Diamond is an exceptional material with remarkable optical, mechanical and thermal properties. Recently, single photon sources based on color centers have been developed.
Optical Q-factors of over 5700 were achieved for a single crystal diamond micro-disk supported by a faceted pillar via crystallographic etching. The method combines DRIE and FIB milling with subsequent thermal annealing to remove FIB damage and to improve the resulting optical quality.
The diamond shape is a unique and eye-catching design that will stand out in any environment. From gift shops to marinas, this 3D Crystal Diamond is sure to draw attention and is perfect for displaying photos, logos, or text of your choice. With low minimums, you can order as many as you need and have it engraved for your organization or event.
Diamond, long considered unconquerable due to its extraordinary strength and chemical resistance, has recently been employed as a platform for next generation sensing, nanophotonic and quantum devices1,2. In particular, the nitrogen vacancy (NV) spin qubit has made it possible for scientists to explore an entirely new class of dynamic materials with both unprecedented electronic, magnetic, and optical properties3,4.
In polycrystalline chemical vapour deposition (pCVD) diamond substrates, however, native deep and shallow defects make it difficult to achieve good timing response stability. These defects are caused by the asymmetry of electron beam interactions with the surface of the crystal. The improvement of pCVD diamond dosimeter performance has been achieved by using pre-irradiation to occupy charge traps prior to dosimetry, but this approach requires a large amount of irradiation for small wafer surfaces.
This paper describes a 3D diamond pillar sensor featuring laser processed internal graphitic electrode columns and wire-bonding pads that eliminate the need for metallisation on the diamond surface. The absence of metallic paths reduces the impact of interference phenomena at the diamond-metal interface, improving detector performance. This is particularly important in medical dosimetry as it allows for lower operational voltage, which improves patient and practitioner safety.
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Diamond, once considered to be unbreakable, has found new life in nanophotonic, quantum and sensing devices1,2,3,4,5. The unique combination of optical, electronic, chemical and thermal properties have made it the ideal material for next-generation sensing, nanophotonic and quantum technologies6,7. The atomically-flat surface of diamond allows nanofabrication with high resolution and its extraordinary hardness makes it durable enough for use in harsh environments, including particle beams.
To improve the performance of diamond sensors, a new prototype has been developed with laser-inscribed electrode columns and graphitic surface connections rather than metal ones. This allows a reduction in the metal content of the detector and reduces interface phenomena that disturb timing response. The resulting device shows a current response that is linear with dose-rate.
The prototype has been tested using electrons from a 90Sr b source and has demonstrated an improvement of 30% in space and time resolution over the previous generation of diamond detectors. The measurements were obtained with a pCVD diamond detector sample containing 5 x 5 x 0.5 mm3 of elementary cells, each consisting of 4 bias and one collection electrode. The electrodes were fabricated inside the detector by laser processing with different pulse lengths for internal and surface features to optimise the geometry.
Add a little something extra to your crystal diamond by having it engraved with your custom logo or text. These 3D laser etchings are a great way to make your gift, award, or trophy look even more amazing.
Unlike mask-based lithography, electron beam induced chemical etching (EBIE) allows the user to directly edit 3D structures in single-crystal diamond without destroying its intrinsic optical properties or graphitization. In this work, EBIE is used to pattern and sculpt the (111) facets of a diamond microparticle in platinum. PL and Raman analysis show that the edited structure maintains its optical functionality.
This is a great gift idea for someone who has everything or if you want to give your loved ones a unique keepsake that will last forever. This 3D crystal can be engraved with any photo or name and will come in an attractive black box.
This item is made to order and requires a minimum of 100 pieces to start production. The product will be shipped in 3-4 business days after the artwork is approved and paid for. This product can be shipped anywhere in the world. If you are looking for a larger quantity, please contact us for pricing and lead time. Please note that shipping costs will vary depending on size, weight and location of shipment.
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Diamond has attracted immense scientific interest due to its unique combination of optical, chemical and mechanical properties1. Recently, nitrogen vacancy luminescence centers in diamond have been employed as spin qubits, opening the door to next generation sensing, nanophotonic and quantum devices2–4.
This new design of 3D graphitised diamond consists of an array of 9 x 5 pixels of diamond electrodes interdigitated with metal wire-bonding pads. The array is fabricated using single crystal CVD (scCVD) diamond produced by Element Six and laser-graphitised with 800 nm Ti:Sapphire laser beams in 50 fs pulses. The high photon density in the beam spot converts the crystalline diamond to ohmically conducting graphite by multiphoton absorption. The short pulse duration prevents the graphite from annealing into amorphous carbon.
The current generated by the electrodes in response to ionising radiation is measured by an external polarisation voltage applied to the diamond-metal interface. This voltage reflects the difference in their respective work functions and drives electrons to flow from lower-work function diamond into higher-work function metal. Previously, only very low voltage operation was possible with diamond dosimeters due to the large bias voltage required to drive these electrons through the diamond-metal junction.
This new prototype has shown a suitable current response for radiotherapy dosimetry at low voltages. It has also been shown to have a linearity with respect to dose, both in the clinical and laboratory setting.