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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:20220101T000000
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DTSTART;TZID=Asia/Hong_Kong:20230807T140000
DTEND;TZID=Asia/Hong_Kong:20230807T153000
DTSTAMP:20260515T232837
CREATED:20250224T023525Z
LAST-MODIFIED:20250224T024011Z
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SUMMARY:Seminar - Quantum Induced Coherence Light Detection and Ranging
DESCRIPTION:Abstract\nQuantum illumination has been proposed and demonstrated to improve the signal-to-noise ratio (SNR) in light detection and ranging (LiDAR). When relying on coincidence detection\, such a quantum LiDAR is limited by the response time of the detector and suffers from jamming noise. Inspired by the Zou-Wang-Mandel experiment\, we design\, construct and validate a quantum induced coherence (QuIC) LiDAR which is inherently immune to ambient and jamming noises. In traditional LiDAR the direct detection of the reflected probe photons suffers from deteriorating SNR for increasing background noise. In QuIC LiDAR we circumvent this obstacle by only detecting the entangled reference photons\, whose single-photon interference fringes are used to obtain the distance of the object\, while the reflected probe photons are used to erase path information of the reference photons. In consequence\, the noise accompanying the reflected probe light has no effect on the detected signal. We demonstrate such noise resilience with both LED and laser light to mimic the background noise and jamming attack. The proposed method paves a new way of battling noise in precise quantum electromagnetic sensing and ranging. \nBiography of the Speaker\nDa-Wei Wang received his Bachelor’s degree from Tongji University in 2006 and Ph.D degree in physics from the Chinese University of Hong Kong in 2012. He worked as Postdoc\, Research Assistant Professor and Research Associate Professor in Texas A&M University from 2012 to 2017\, and then joined Zhejiang University as a Professor. His research focuses in quantum simulation in atom-photon coupled systems\, and optical sensing with quantum light. He published more than 60 papers in peer reviewed journals\, including 2 Science\, 1 Nat. Phys.\, 1 Nat. Photon.\, 1 Nat. Nanotechnol. and 15 PRL papers. He was supported by NSFC Key Program and National Key Research and Development Program. \nOrganiser\nProf. Z. Chu \nAll are welcome!
URL:https://ece.hku.hk/events/seminar-quantum-induced-coherence-light-detection-and-rangingquantum-illumination-has-been-proposed-and-demonstrated-to-improve-the-signal-to-noise-ratio-snr-in-light-detection-and-ranging-lidar/
CATEGORIES:Seminar
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