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X-WR-CALNAME:Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系
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X-WR-CALDESC:Events for Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系
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TZID:Asia/Hong_Kong
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DTSTART;TZID=Asia/Hong_Kong:20260421T110000
DTEND;TZID=Asia/Hong_Kong:20260421T120000
DTSTAMP:20260511T035356
CREATED:20260326T042150Z
LAST-MODIFIED:20260326T090341Z
UID:115419-1776769200-1776772800@ece.hku.hk
SUMMARY:RPG Seminar – Fast customization of color centers in single nanodiamonds and its applications
DESCRIPTION:Zoom Link:\nhttps://hku.zoom.us/j/91528535994?pwd=pagmffbltruagBNPmFkEWo5sxaFJrN.1 \nAbstract\nDeterministic control of nitrogen–vacancy (NV) centers in nanodiamonds (NDs) is critical for emerging applications in quantum photonics and high-density optical data storage. Conventional approaches based on random irradiation and thermal annealing often lead to nondeterministic NV formation and lattice damage\, making it difficult to precisely control the optical properties of the color centers and resulting in low fabrication yields. In this seminar\, we present a rapid and targeted approach for customizing NV centers in pre-selected single nanodiamonds using a standard transmission electron microscope (TEM). A brief 1-second electron beam exposure enables NV formation without post-annealing while minimizing lattice damage. The resulting nanodiamonds exhibit stable optical and spin properties. Furthermore\, controlled TEM exposure can quench NV photoluminescence within tens of seconds\, enabling a fast write–erase process. Leveraging this capability\, we demonstrate a flexible nanodiamond-based optical data storage platform. This accessible and highly targeted method provides a powerful route for on-demand NV center engineering and opens new opportunities for quantum technologies and nanoscale photonic data storage. \nSpeaker\nMiss Jiaqi Li\nDepartment of Electrical and Computer Engineering\nThe University of Hong Kong \nBiography of the Speaker\nJiaqi Li received her BEng degree in Physics from South China Normal University in 2022. She is currently pursuing a PhD in the Department of Electrical and Computer Engineering at the University of Hong Kong. Her research focuses on the fabrication\, characterization\, and applications of nitrogen-vacancy (NV) centers in diamond materials\, particularly in nanodiamonds. \nOrganiser\nProf. Zhiqin Chu \nDepartment of Electrical and Computer Engineering\, The University of Hong Kong \nAll are welcome.
URL:https://ece.hku.hk/events/20260421/
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://ece.hku.hk/wp-content/uploads/2024/11/rpg-seminar.jpg
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