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Home»Science»Uncovering the Secrets of Diamond: Optoelectronic Devices Reveal Unexpected Lightning-like Phenomena
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Uncovering the Secrets of Diamond: Optoelectronic Devices Reveal Unexpected Lightning-like Phenomena

October 3, 2024No Comments3 Mins Read
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Researchers have discovered an unexpected phenomenon in diamond optoelectronic devices, reminiscent of lightning in slow motion. This groundbreaking study sheds light on the potential of diamond for high-power electronics and quantum technology.

3D mapping and manipulation of photocurrent in an optoelectronic diamond device
The array of lasers that control the charge of NV centres in the diamond and image where current flows. Green lasers are used for charge control, while orange and red lasers allow for imaging in three dimensions. Credit: A. Wood, D. McCloskey and E. Grant

Decoding Diamond’s Electrical Mysteries

While diamond is commonly recognized for its uses in fine jewelry and industrial applications, this work could help it break into a new area: high-powered electronics. Diamond has been known to be an excellent conductor of heat, and previous studies have shown that many qubits can also fit into diamond’s lattice, thus making it a strong candidate for future power electronics and quantum computing.

But challenges in the fabrication, joining and engineering of diamond for electronic devices have kept it from becoming a widespread material. Also, the basic knowledge of how charges move through diamond and how impurities and defects can alter its electrical behavior has eluded scientists.

In a scientific first, the team from the University of Melbourne combined high-resolution 3D optical microscopy and electrical measurements to see what was happening inside the diamond plastic.

Lightning flashes to Earth in a field of diamonds.

The researchers were able to image the transport of charges by taking advantage of the special properties of so-called nitrogen-vacancy (NV) centers in the diamond crystal lattice. NV centers can also display neutral or negatively charged state, so the Researchers could build a detailed 3D image of where current flowed by looking at the electric charge of these defects.

It is a truly amazing thing they found. Instead of a steady current, the charges flowed along narrow threads running through the diamond in striking patterns that resembled lightning. These filaments followed sites along the metal electrodes, just as a lightning bolt starts from specific positions along the leading and returns to these places while it draws on the supply of electrons (the ‘invisible leader’). ORNL and USF used microscopy to see it happening, with the microelectrons meeting up in pathways as they streak towards ground (positively charged particles also move from ground to cloud, seeking electrons).

Our finding is unexpected and challenges our general understanding of charge transport in diamond, providing potential new directions for research on the topic. The researchers think these particular ‘ground’ features on the metal-to-diamond surface are spots where there is improved electrical conduction, so that charges flowing over the mechanism would gather at those locations like lightning rods.

Conclusion

This novel phenomena uncovered by the research of the MIT team has opened up a new front in diamond optoelectronic devices and its exploration would not only have implications for high-power electronics but also for quantum technology. This deep insight into the interplay of charge and excitations in diamond provides a pathway for creating better diamond-based power devices, by enabling high-performance metal-to-diamond interfaces. Furthermore, their controllable engineering of the charge state of Nitrogen-Vacancy (NV) centers acts as a promising element to form optically reconfigurable diamond devices and is an important intermediate step toward room-temperature quantum computing. The intrigue and promise of diamond remain, this study is further testament to the mystery and capacity it holds.

diamonds high-power electronics lightning optoelectronics Quantum technology in medicine
jeffbinu
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Tech enthusiast by profession, passionate blogger by choice. When I'm not immersed in the world of technology, you'll find me crafting and sharing content on this blog. Here, I explore my diverse interests and insights, turning my free time into an opportunity to connect with like-minded readers.

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