BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系 - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://ece.hku.hk
X-WR-CALDESC:Events for Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Asia/Hong_Kong
BEGIN:STANDARD
TZOFFSETFROM:+0800
TZOFFSETTO:+0800
TZNAME:HKT
DTSTART:20240101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Asia/Hong_Kong:20250623T110000
DTEND;TZID=Asia/Hong_Kong:20250623T120000
DTSTAMP:20260511T230032
CREATED:20250612T015942Z
LAST-MODIFIED:20250612T100557Z
UID:111868-1750676400-1750680000@ece.hku.hk
SUMMARY:Optical polarization modulation of fluorescent nanodiamonds toward practical applications
DESCRIPTION:Zoom Link: https://hku.zoom.us/j/91034052349 \nAbstract\nWith ultrahigh photostability\, nanoscale size and good biocompatibility\, fluorescent nanodiamonds containing nitrogen-vacancy (NV) centers are promising nanoscale markers. The prevailing method of using this marker—quantum sensing—demonstrates outstanding function as detecting various physical quantities with high precision and spatial resolution. However\, the complexity of apparatus and manipulation currently limit this method in the stage of model application and proof-of-concept. To balance strong function with ease of use\, we proposed another approach\, i.e.\, optical linear polarization modulation (LPM). In the initial phase\, we set up a custom-built confocal microscopy system that provides high-quality\, single-spot measurement data with user-friendly operation. Using this system\, we measured the LPM curve of single NV centers to determine their orientations\, and for the first time\, directly observed rotational motion in the cellular traction force field—serving as a proof-of-concept for our method. In the subsequent phase\, we enabled significantly brighter fluorescent nanodiamonds\, by demonstrating that the LPM model of multiple NV centers is equivalent to that of a single NV center. This breakthrough allows for the observation of spatial mapping information using convenient wide-field microscopy. These advancements provided the basis for multidimensional encoding of anti-counterfeiting labels\, achieving both satisfactory anticounterfeiting and commercial performance. This work marks a significant step toward the practical application of fluorescent nanodiamonds. \nSpeaker\nMr. Lingzhi Wang\nDepartment of Electrical and Electronic Engineering\nThe University of Hong Kong \nSpeaker’s Biography\nLingzhi Wang received his B.Eng. Degree from Nanjing University. He is currently pursing a PhD degree in the Department of Electrical and Electronic Engineering\, The University of Hong Kong. His research focuses on promoting practical application of fluorescent nanodiamonds by optical polarization modulation method. \nAll are welcome!
URL:https://ece.hku.hk/events/20250623-1/
LOCATION:Online via Zoom
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://ece.hku.hk/wp-content/uploads/2024/11/rpg-seminar.jpg
END:VEVENT
END:VCALENDAR