Importance of Diamonds to future electronics, Please watch this video it contains relevant and important information on the state of today’s diamond technology.
How This Gem Could Be The Future Of Technology
January 5 2026
Testing of the modified earth mined diamonds indicated that HPHT processing deposited magnetic impurities into the diamonds shifting the diamagnetic moment to paramagnetic. As a result we have shifted to CVD diamonds testing for a more pure form of diamond. Results so far have been favorable. We are acquiring pure CVD diamond substrates that will be tested for any trace silicone and will permit flat discs with a variety of impurities such as boron and lithium. Testing with 1.2 up to 2.87 GHZ microwaves, 405nm, 532nm and 680nm lasers has helped in defining ways to alter the spin of nitrogen vacancies and in doing so modify the diamagnetic moment of CVD diamonds. This may also revers my original hypothesis to negative from a positive interaction with external magnetic fields (TBD).
From my Linkdin posts:
I Wonder What Reality Might Look Like? 12/12/2025
Already in Existence, A CVD BDD diamond Test Stack! See bottom of post
Sometimes technology just seems to develop and arrive at the appropriate time and this stack seems to be that case. Its primary application is waste water treatment but with minor modifications the assembly should allow us to evaluate its functionality for use as a partial and practical sub section of a solid-state linear quantum drive (photon powered engine). This possibly could be used to evaluate the movement of the diamagnetic fields changing moment (local force gradient) as it moves up or down the vertical axis along with the actual amount of thrust generated by manipulating the NV- center’s electron spin as they interact with local magnetic field lines. From what I can see in this photo the thicker sections could be removed and replaced with UV sources or lasers.
Hold on; this is jumping too far ahead of things as they stand today, first there is a great deal of experimenting yet to do before getting to finalizing the needs for the actual assembly of a functional system. Although I must say at first glance, it does look promising.
Speaking of coincidental timing a related experiment recently conducted at the University of Rochester, floating a nano-diamond in a green laser beam demonstrating quantum opto-mechanics another possible lead into the linear drive requirements.
https://www.youtube.com/watch?v=FPHJyaUDiVI
As a follow up explanation to quantum opto-mechanics test, see the following.
1. Creating a Local Force Gradient: By focusing a UV laser onto a specific spot of a levitating nano-diamond, you locally change the population of the magnetic NV⁻ states to the less-magnetic NV⁰ states. This creates a spatial gradient in the local magnetic susceptibility of the diamond, generating an unbalanced magnetic force.
2. Motion Control: Similar to the pyrolytic graphite set up used in the ECOSat diamagnetic satellite project, the diamond will move away from the region with the reduced magnetic moment (the UV-lit spot), allowing you to “steer” or “drive” the levitating diamond across a non-uniform magnetic field. I see the light; I think we are starting to get somewhere.
Enough for now, as I said previously, “The Deep End”.
11/24/25 The pure 30CT CVD diamond arrive last night, testing will proceed this week. First tests will be with different wave lengths checking for fluorescence. The results so far indicate a pure CVD with little to no vacancies. Diamagnetic testing to follow with magnetic setup. See bottom of page for details on CVD and NV background information.
11/27/2025 Conducted a couple different colour of light test on the 30ct CVD and also a pink 8ct CVD diamond with interesting results. Using 365nm and 455nm lights (+ or –) (40 to 50nm either side of the 405nm source) neither diamond had any photoluminescence (PL), reaction. It was interesting though that the CVD pink 8ct diamond looked green visually to me, but through the camera was seen as red. When exposed to the 405nm laser light.
See bottom of page for related comments concerning 455nm reactions in CVD diamonds.
Moving to testing of CVD diamonds October 31 2025
I have acquired a 30CT CVD clear diamond to test it’s diamagnetic signature to see if inclusions are an issue with this process as well, although it is suggested that the only inclusions should be carbon. Nitrogen would lead to a yellowing of the clear diamond as well. The CVD diamond and natual diamond chips should arrive sometime in December.
Process description from the seller:
CVD lab grown diamond rough typically begins with a tiny diamond seed or substrate. This seed is placed in a specially designed chamber where a mixture of gases, usually methane and hydrogen, is introduced. The gases are then heated to very high temperatures, causing them to break down and release carbon atoms.
The carbon atoms, in turn, begin to settle and accumulate on the diamond seed, layer by layer. As the layers grow, they gradually form a larger crystal structure, replicating the atomic structure of natural diamonds. This process can take anywhere from a few weeks to several months, depending on the desired size and quality of the final diamond.
Once the growth phase is complete, the resulting CVD lab grown diamond rough is extracted from the chamber. At this stage, the rough appears as a translucent, typically light yellow or brownish-colored crystal. The size and shape of the rough can vary, ranging from a few millimeters to several centimeters in diameter.
One of the advantages of CVD lab grown diamond rough is its potential for achieving exceptional clarity and color. Since the growth process is controlled in a laboratory environment, impurities and defects can be minimized or eliminated, resulting in highly pure and visually appealing diamonds.
The Proportional Diamagnetic Effect Related to The Volume of Material Oct. 28 2025
The diamagnetic effect is proportional to the volume of the material. A larger volume will have a greater magnetic energy when subjected to a magnetic field. This means a larger volume of a diamagnetic material will be repelled more strongly by the external field because the induced magnetic moment, which opposes the field, is also larger. Pure diamonds are strongly diamagnetic, meaning they are weakly repelled by a magnetic field due to the absence of free electrons. This property arises from the strong covalent bonds between carbon atoms and is temperature-independent. However, synthetic or enhanced diamonds produced by using high pressure and high temperatures commonly come with trace contents of magnetic metal impurities like iron, nickel, and cobalt can exhibit paramagnetic or ferromagnetic responses. Since synthetic diamonds produce using a different process called Chemical Vapor Deposition similar to the production of pyrolytic graphite at low pressure and high temperature the presence of magnetic materials is avoided to produce thin diamond discs to replace silicone substrates to be used in quantum computers. This may prove beneficial to further testing of the linear quantum drive experiment.
A Method to Quickly Identify HPHT Synthetic Diamonds
The test setup used to measure the diamagnetic field quickly permitted the identification of HPHT synthetic and enhanced diamonds by generating a negative generated force as clearly seen in the following series of photos. Whereas Bismuth produced a positive force as expected from diamagnetic materials. Also see the following reference article “Magnetism in Gemstones“, link bellow.
https://www.gemstonemagnetism.com/how_t0_5_copy
This is a simple method to determine man made HPHT diamonds versing natural diamagnetic diamonds.
Up coming UVB testing to determine if the diamond cut can effect the diamagnetic moment strength. The 91.6ct diamond has a Radiant cut, seems to be generating more sparkle as the photons travel at about half the speed of light reflecting internally inside the Radiant diamond more than the 69.9CT Asscher cut diamond.
Importance of Diamonds to future electronics Oct. 05 2025
An explanation for the orange/red glow of the gray and blue diamonds plus others are becoming aware of the importance of diamonds to the electronics industry of the future. I found this very supportive of my research.
https://www.youtube.com/watch?v=FHHATmUdCx4
How This Gem Could Be The Future Of Technology
Aug. 11 2025
I need a lot more power for the laser! It’s not the black diamond it was supposed to be and it only took 12 years to figure that out. Actually I am not sure if it is even a diamond, it may be a 10 ct dark red ruby since it gave no response to a diamond tester. I was trying to figure out how much power I would require from a UV laser to burn a reasonable size hole into this diamond so I could insert a small piece of thorium ultimately into a blue diamond as part of the process to make a diamond nuclear battery.
Next we will use an earth mind 19.7 ct black diamond with a small hole presently through it as a starting point that may help expedite the process.
Carbonado or black diamonds, are a rare, naturally occurring, opaque polycrystalline form of diamond composed of diamond, graphite, and amorphous carbon. Unlike traditional diamonds, carbonados are found in alluvial deposits in Brazil and the Central African Republic and are believed to have an extraterrestrial origin, possibly from a supernova. They were the key to the development of diamond substrates in place of silicon for future high speed computer chips.
We are also conducting tests with Champaign and gray diamonds investigation the possibility of extend negative time. See the following reference experiments.
Evidence of Negative Time
https://www.perplexity.ai/page/evidence-of-negative-time-Ut987S07Rl2p3ryWJL_Pig
This gray diamond ring has 4 diamonds with impurities that allow them to have florescence of over a minute which may permit extended measurements of negative time. At the same time we are also testing a Champaign diamond if it has negative time properties.
With a little help from AI : November 13/2025
Diamond electrically conductive, fluorescence and phosphorescence
Boron-doped diamonds become electrically conductive, acting as semiconductors or even metals, across a range of boron concentrations, from trace amounts in naturally blue diamonds (parts-per-million) to high percentages in synthetic materials. The specific percentage required depends on the desired level of conductivity.
Conductivity Levels by Boron Concentration
· Trace Amounts (parts-per-million or ppm): Natural blue diamonds, like the Hope Diamond, contain trace amounts of boron, which make them p-type semiconductors. The concentration is low but sufficient to induce semiconducting behavior by creating “holes” that carry electrical current.
· Metal-to-Insulator Transition: The transition to metallic-like conductivity occurs at a concentration of approximately 3 x 10²⁰ atoms per cm³. This concentration is equivalent to a very low atomic percentage, around 0.17 at.% (based on diamond’s atomic density of 1.76 x 10²³ atoms per cm³). At this point, the impurity bands formed by neighboring boron atoms merge with the diamond’s valence band, allowing free charge movement.
· High Concentrations: In heavily doped synthetic diamonds, high boron concentrations (up to several atomic percent) result in maximum conductivity enhancement.
- A concentration of around 5.88 at.% B-atoms showed maximum splitting of energy bands, leading to significant enhancement of conductivity.
- The maximum achievable boron concentration in p-type BDD (boron-doped diamond) films can be between 4 at.% and 7 at.%, which results in superhard, electrically conductive materials.
In summary, even minor doping makes diamond a semiconductor, but significantly higher percentages are needed for metallic-like conduction.
Phosphorescence in a diamond is not caused by a specific percentage mix of nitrogen and boron. Instead, it is a complex phenomenon tied to the presence and concentration of these trace elements, especially boron, and their interaction within the diamond’s crystal structure.
Here is a breakdown of how these elements relate to phosphorescence:
Role of Boron
· Phosphorescence: Boron is the primary element responsible for phosphorescence in diamonds, particularly a blue afterglow.
· Concentration: As little as 1 part per million (ppm) of boron is enough to give a diamond a blue or gray color and make it a p-type semiconductor.
Role of Nitrogen
- Fluorescence: Nitrogen is the most common impurity in diamonds and is typically associated with fluorescence (a glow that occurs only while under a UV light source), often causing a yellow or blue glow.
- Phosphorescence Suppression: Research indicates that the presence of nitrogen can actually suppress phosphorescence, which is why diamonds with strong phosphorescence are often Type IIb diamonds that have very low or unmeasurable amounts of nitrogen.
Phosphorescence in natural blue and gray diamonds is caused primarily by
trace amounts of boron, with the specific color of the afterglow (blue, gray, or red) being influenced by the interplay between boron and minute quantities of nitrogen and other structural defects.
Trace Elements and Mechanisms
- Boron (B): This is the primary trace element responsible for the characteristic blue/gray body color of Type IIb diamonds, as well as their phosphorescence. Boron acts as an electron acceptor within the diamond’s crystal lattice. When exposed to UV light, electrons are excited and temporarily trapped in defect sites. The delayed release of this energy as visible light after the UV source is removed creates the phosphorescence.
- Nitrogen (N): While Type IIb diamonds are characterized by negligible amounts of nitrogen, the trace nitrogen that is present can influence the phosphorescence color and intensity.
- Structural Defects: The specific configuration of these impurities and other simple structural defects (like vacancies) within the carbon lattice determines the exact color and duration of the afterglow.
Phosphorescence Colors
The observed color is a combination of two primary emission bands, centered at approximately 500 nm (greenish-blue) and 660 nm (orange-red):
- Blue Phosphorescence: When the 500 nm band is more intense, the diamond phosphoresces blue or greenish-blue. This is common in many natural blue diamonds.
- Gray Phosphorescence: Gray diamonds can result from either boron impurities (which would lead to a bluish appearance and typical blue/red phosphorescence bands) or from simple structural defects (such as hydrogen-related defects or micro-inclusions), which may cause different or uncharacteristic phosphorescence.
- Red Phosphorescence: When the 660 nm (orange-red) band is stronger and decays more slowly, the diamond exhibits red phosphorescence, as famously seen in the Hope Diamond.
Percentage Concentration
The concentrations of these elements are in trace amounts, typically at the parts per billion (ppb) level, which are sufficient to cause both the body color and the phosphorescence.
- Specific percentages are not a standard measurement for phosphorescence in gemology reports, as the effect depends on the complex interplay of defect structures and concentrations, not just a simple percentage.
- The concentration and distribution of these impurities determine the intensity and duration of the glow, which can range from a few seconds to several minutes.
In summary, the presence of boron is the key activator for phosphorescence in blue and gray diamonds, while minor variations in the local atomic environment and other trace elements like nitrogen fine-tune the specific color and persistence of the glow.
Phosphorescence in blue and gray diamonds is primarily caused by
trace amounts of boron, which can be present in concentrations as low as a few parts per billion (ppb). This element is characteristic of type IIb diamonds, the rare category to which most natural blue diamonds belong.
Trace Elements and Phosphorescence Color
- Boron is commonly associated with a blue phosphorescent glow.
- However, in some type IIb diamonds (often those with gray or violet components), the phosphorescence can appear red or orange. The Hope Diamond is a famous example, known for its vibrant red afterglow that can last for up to a minute.
- The concentration and distribution of impurities, along with the specific structural defects, determine the color and intensity of the afterglow.
- Trace nitrogen within the stone can also produce green or yellow phosphorescence, though this is less common for blue/gray diamonds.
- Aluminum is another trace element that can contribute to fluorescence and phosphorescence characteristics in diamonds.
- Gray diamonds can also derive their color and phosphorescence properties from simple structural defects caused by radiation exposure, or from micro-inclusions, rather than solely boron.
Concentration and Measurement
The concentration of these trace elements is extremely low, in the range of parts per billion. For example, the Hope Diamond contains about 360 ppb of boron.
While the color (hue) of a diamond with phosphorescence is listed on its grading certificate (e.g., Fancy Deep Grayish Blue), the phosphorescence itself is generally not measured or listed by major gemological laboratories like the GIA in their standard reports. It is primarily a diagnostic feature used in laboratory settings to distinguish natural diamonds from treated or synthetic ones.
Good Explanation of fluorescence and phosphorescence by Whiteflash Diamonds Company
https://www.whiteflash.com/diamond-education/diamond-phosphorescence
The Deep End 11/21/2025
A Hypothesis moves towards Reality
Clarity of the influence of Boron, Nitrogen and Nitrogen Vacancies in diamonds has altered my original assumptions as to the required impurities that I think will be required in making the fluorescent 0.5mm thick diamond substrate 4” diameter disc. Further for confirmation, that I will be able to modify the diamagnetic moment with UV light and other possible wave lengths. The discs will be necessary for the assembly of the linear quantum drive, a near light speed engine powered by light.
First the number of nitrogen atoms adjacent to a nitrogen vacancy; be it 1, 2 or 3 will determine the colour of fluorescence along with other deformities and excitation wavelengths which, would produce the greatest change in the diamagnetic moment?
Second what methodology will allow creating the maximum number of nitrogen vacancies and permit the controlled insertion of the relevant number of nitrogen atoms to create the maximum response? This technology will also be beneficial for advancements in the area of quantum computers, permitting their operation at near room temperature.
This will be a move away from boron as I have found that even in small amounts of a few parts per million boron in combination with nitrogen leads to phosphorescence with extended time durations that is incompatible with the theoretical design of the engine. Increased percentages of boron in the 5.88 percent range or more, then the diamond starts acting like a very conductive metal and this would lead to the generation of undetermined and uncontrolled magnetic fields re Maxwell equations.
Ampère’s law with Maxwell’s addition: ∇×𝐁=𝜇0𝐉+𝜇0𝜖0𝜕𝐄𝜕𝑡
The magnetic field produced by a steady current flowing in a very long straight wire encircles the wire. At a point P a radial distance r away from the wire it has magnitude
B = μ0I/(2πr)
The resulting mix ratios of B & N that produce gray or blue diamonds are very nice to look at but that is not the point. With lower percentages of boron the diamond acts as P type semiconductors or combined with lithium produce N type semiconductors leaving the door open to producing the new age of computer chips.
Nitrogen vacancies verse number of adjacent nitrogen atoms what colours are generated?
The colour (photo-luminescence) of nitrogen-related defects in diamonds depends on the specific defect structure and its charge state, not simply the number of adjacent nitrogen atoms in a general sense, but rather the specific configuration with a vacancy. The main configurations involving a nitrogen atom and a vacancy are the nitrogen-vacancy (NV) center and the nitrogen-vacancy-nitrogen (N2V) center.
| The key color characteristics are: | ||||
| Defect Type | Charge State | Common Name | Color Emission/Absorption | |
| Nitrogen-Vacancy | Negative (NV⁻) | NV | Red fluorescence (600–800 nm emission, often pink or red appearance) when excited by green light. | |
| Nitrogen-Vacancy | Neutral (NV⁰) | NV⁰ | Yellow/Orange absorption (zero-phonon line at 575 nm). | |
| Nitrogen-Vacancy-Nitrogen | Neutral (N₂V⁰) | H3 center | Green emission peak (~540 nm). | |
| N3 Defect | (Involves 3 N atoms) | N3 center | Absorbs blue light around 415 nm, contributing to the typical yellow “cape” diamonds’ color. | |
The NV⁻ center is particularly important in quantum technology due to its robust red luminescence and spin properties. The presence of other defects, like the N3 center or P1 centers (single substitutional nitrogen), in the surrounding lattice can also influence the overall color of the diamond by altering the charge state stability of the NV center.
What this requires is more testing of natural and modified CVD diamonds with a range of wavelengths to see the best combinations to activate maximum fluorescence. Also the first substrate will be assembled by selecting the fluorescing blueish/white, green, red and yellow diamond chips as see in the above photo. Now that is going to take some time and don’t sneeze. Did that today and ended up picking up scattered diamonds off the floor.
https://www.photoniques.com/articles/photon/pdf/2021/02/photon2021107p50.pdf
https://opg.optica.org/ome/fulltext.cfm?uri=ome-10-5-1224
NV Time Crystals
A little more AI help 11/24/2025
The creation of “time crystal diamonds” in Chemical Vapor Deposition (CVD) diamonds refers to advanced quantum research where a time quasicrystal (a type of time crystal) is engineered inside a diamond. This is a scientific process for quantum applications, not for creating typical gemstone diamonds.
Scientific Process
Researchers create these specialized diamonds using a modified CVD process to incorporate specific defects known as nitrogen-vacancy (NV) centers.
· Nitrogen Bombardment: A diamond sample (often a CVD-grown single crystal diamond) is bombarded with nitrogen ions. This process lodges nitrogen atoms within the crystal lattice and creates millions of microscopic holes or “vacancy states”.
· Electron Collection: Electrons collect in these vacancy states, creating the NV centers, which possess unique optical and spin characteristics valuable for quantum research.
· Quantum Excitation: When excited with a laser, these quantum states produce fluorescence. Exposing these nitrogen vacancies to specific oscillating electric fields causes the electron spin to flip orientation, changing how brightly they glow.
· Creating the Quasicrystal: Researchers applied two microwave beams at different frequencies to the diamond lattice. This caused the electrons to redistribute in a non-repeating, quasi-periodic rhythm, effectively producing a continuous time quasicrystal pattern within the diamond material.
Purpose
The goal of creating a time quasicrystal in a diamond is not related to the diamond’s use as a gemstone. Instead, it is a significant development in fundamental physics and quantum computing research. The sensitivity of these quantum states may allow for the detection of extremely weak electric or magnetic fields, and help prove assumptions about how quantum mechanical systems behave.
Key Methods to Maximize NV Centers
· Start with High Nitrogen Concentration: The diamond crystal must initially contain a significant amount of single, substitutional nitrogen atoms (known as P1 centers), typically in the parts per million (ppm) range, either through High-Pressure High-Temperature (HPHT) synthesis or by adding nitrogen gas during Chemical Vapor Deposition (CVD) growth.
· Irradiation: The diamond is then bombarded with high-energy particles, such as electrons, protons, or ions. This process displaces carbon atoms in the lattice, creating vacancies.
- Electron beam irradiation is common because it creates isolated vacancies relatively uniformly throughout the material while minimizing other lattice damage.
- The energy and fluence (dose) of the irradiation are crucial parameters that must be optimized for a given initial nitrogen concentration.
· Thermal Annealing: After irradiation, the diamond is heated to a high temperature (typically between 800°C and 1200°C) in a controlled environment. This annealing step mobilizes the created vacancies, allowing them to migrate through the crystal lattice until they become trapped by the stable, immobile nitrogen atoms, forming the desired NV centers.
- Simultaneous irradiation and annealing can also increase the efficiency of the NV center creation process.
- The number of nitrogen atoms associated with nitrogen-vacancy (NV) centers in
- chemical vapor deposition (CVD) diamonds is controlled primarily by managing the overall nitrogen concentration during growth and the subsequent vacancy creation process (irradiation and annealing).
- The number of nitrogen atoms associated with nitrogen-vacancy (NV) centers in
- chemical vapor deposition (CVD) diamonds is controlled primarily by managing the overall nitrogen concentration during growth and the subsequent vacancy creation process (irradiation and annealing).
Influencing the Number of Associated Nitrogen Atoms
The goal is typically to form an NV center, which consists of a single substitutional nitrogen atom adjacent to a single carbon vacancy (N-V configuration). Other configurations, such as two nitrogen atoms and a vacancy (H3 center) or more complex defects, can also form.
CVD Growth Process Control
The initial step is to control the total amount of nitrogen incorporated into the diamond lattice during the CVD growth phase. This nitrogen typically exists as isolated substitutional nitrogen atoms (known as P1 centers) before further processing.
Nitrogen-to-Carbon (N/C) Gas Ratio: The concentration of nitrogen in the grown diamond increases linearly with an increasing flow rate ratio of the nitrogen source gas (like N2 or N2O) to the carbon source gas (CH4) in the plasma.
Dopant Gas Type: Using N2O as a nitrogen source results in a much higher incorporation efficiency compared to using N2 gas.
· Growth Conditions: Lower growth temperatures and lower methane concentrations can enhance nitrogen doping efficiency.
· Gas Purification: Using highly purified hydrogen and methane source gases reduces the residual background nitrogen incorporation, which is crucial for achieving low, controlled nitrogen concentrations.
Post-Growth Processing Control
After growing the nitrogen-doped diamond, subsequent steps are used to convert some of the isolated nitrogen atoms into NV centers
· Irradiation: High-energy particle irradiation (e.g., electrons, protons, or ions) is used to create vacancies in the diamond lattice. The total fluence (dose) of the irradiation determines the concentration of created vacancies.
· Annealing: A high-temperature annealing step (typically above 700 °C, often around 1000 °C) is required to mobilize the vacancies, allowing them to migrate through the lattice and be captured by the substitutional nitrogen atoms, forming the NV centers.
· Vacancy-to-Nitrogen Ratio: The key to influencing the final NV concentration (and minimizing other nitrogen-related defects) is the ratio of created vacancies to the initial substitutional nitrogen concentration.
- An optimal ratio is sought (e.g., achieving a total NV-to-initial nitrogen ratio of approximately 20% is a reported target).
- If the vacancy concentration significantly exceeds the nitrogen concentration, unwanted defects or NV centers in the neutral charge state (NV0) may form, which are less desirable for quantum applications compared to the negatively charged state (NV-).
- By precisely controlling these parameters, researchers can tailor the concentration of single NV centers to meet specific application requirements, balancing between high NV density for stronger signals and lower total nitrogen concentration for longer quantum coherence times.
Quantum Excitation: When excited with a laser, these quantum states produce fluorescence. Exposing these nitrogen vacancies to specific oscillating electric fields causes the electron spin to flip orientation, changing how brightly they glow.
Thinking
This description refers to the principles behind how
nitrogen-vacancy (NV) centers in diamond function as quantum sensors [1].
Here is a breakdown of the process described:
- Quantum States: The NV center is a point defect in a diamond crystal lattice, which possesses distinct, measurable quantum energy states [1].
- Excitation and Fluorescence: When a laser light (usually green) excites the center, it produces red fluorescence (glow) [1].
- Electron Spin Manipulation: The brightness of this fluorescence is directly related to the NV center’s electron spin orientation (either spin state 0 or +/-1) [1].
- Electric Field Interaction: Applying a specific oscillating electric or microwave field at a precise frequency causes the electron spin to flip (a process called magnetic resonance) [1].
- Change in Brightness: This spin flip changes the efficiency with which the NV center fluoresces, altering how brightly it glows when excited by the laser [1].
Scientists utilize this predictable relationship between external fields and fluorescence to precisely measure minute magnetic or electric fields, temperature changes, and strain at the nanoscale [1].
Photoluminescence (PL) with CVD diamond 11/25/2025
CVD diamond exposed to 405 nm blue laser went red 637nm why? More AI help follows in explanation.
The red fluorescence (emission around 600 nm) observed in a
CVD diamond when exposed to a 405 nm blue laser is caused by specific nitrogen-vacancy (NV) defect centers within the diamond’s crystal structure.
Mechanism of Photoluminescence
The process you observed is called photoluminescence (PL), where the diamond absorbs light at one wavelength (405 nm) and emits it at a longer wavelength (around 600 nm, which appears red/orange-red). This occurs in a few steps:
1 · Excitation: The 405 nm laser light provides energy to electrons associated with certain defect centers in the diamond’s lattice.
2 · Energy Transfer: These electrons jump to a higher, “excited” energy state.
3 · Emission: The electrons quickly return to a more stable, lower energy state, releasing the excess energy as a photon of light in the process. Because some energy is lost to the lattice as heat during this cycle, the emitted light has lower energy (a longer wavelength) than the absorbed light, resulting in a red glow from a blue laser.
Role of Defects
The specific color of the fluorescence is a fingerprint of the type of trace elements or structural defects present:
Nitrogen-Vacancy (NV) Centers: These are a key characteristic of CVD diamonds, which often contain trace nitrogen impurities. The NV center, in its negatively charged state (NV-), has an emission peak around 637 nm, and the neutral state (NV0) peaks around 575 nm. Both contribute to the observed red/orange-red color.
· Silicon-Vacancy (SiV) Centers: Silicon is also a common impurity in CVD diamonds (originating from the silicon substrate used for growth) and forms a defect center that can luminesce. The SiV center typically emits at 737 nm, which can contribute to the red emission, especially under certain excitation conditions.
The presence and specific distribution of these defects and impurities are typical for the CVD growth process and help gemologists and researchers identify and characterize lab-grown diamonds
Diamond Reactions to 455 nm Light
11/28/2025
- Natural Diamonds: The vast majority of natural, colorless Type Ia and Type IIa diamonds exhibit a delayed blue luminescence centered around 455 nm when excited by pulsed short-wave UV radiation (wavelengths below 225 nm). This specific reaction is the basis for commercial screening devices like the De Beers SYNTHdetect instrument, which use this signature to help identify natural stones.
- CVD Synthetic Diamonds:
- Fluorescence and Phosphorescence: CVD diamonds can exhibit a wide range of fluorescence colors, including blue, green, orange, red, and yellow, depending on the specific growth conditions and post-growth treatments. They often display phosphorescence (a lingering glow after the UV source is removed), which is uncommon in natural diamonds.
- Specific Wavelength Reactions: While they typically lack the specific delayed 455 nm luminescence signature used to identify natural diamonds, a delayed, broad blue luminescence centered at 465 nm has been documented in CVD diamonds at low temperatures. This indicates that reactions near the 455 nm range are possible in synthetic diamonds under certain conditions.
Therefore, the reaction (or lack thereof) to specific wavelengths of light, particularly in advanced gemological testing, is a complex diagnostic tool used by experts to differentiate between natural and lab-grown diamonds. The blanket statement that CVD diamonds do not react to 455 nm light is an oversimplification of their varied optical properties
Deep-UV for Identification: A more definitive method for identification often involves deep-UV (shorter wavelength, e.g., <225 nm) illumination, which can reveal growth patterns and defects specific to lab-grown diamonds that are inert under 365 nm light