BEGIN:VCALENDAR VERSION:2.0 X-WR-CALNAME:EventsCalendar PRODID:-//hacksw/handcal//NONSGML v1.0//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York LAST-MODIFIED:20240422T053451Z TZURL:https://www.tzurl.org/zoneinfo-outlook/America/New_York X-LIC-LOCATION:America/New_York BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CATEGORIES:College of Arts and Sciences,Thesis/Dissertations DESCRIPTION:Advisor: Dr. Wei-Shun Chang Committee members: Dr. Shuowei Cai, Dr. Milana Vasudev Abstract: Characterizing the chirality of plasmonic na nostructures at the single-particle level is crucial to reveal structure –optochirality relationships. Single-particle dark-field scattering spec troscopy is commonly used to measure circular differential scattering (CDS ) owing to its high throughput, ease of implementation, and high spectrosc opic resolution. However, conventional CDS measurement setups suffer from linear dichroism artifacts, limiting measurement accuracy and leading to s ignificant uncertainty in detecting weak chirality. To address these limit ations, this work aims to develop a modified CDS configuration that simult aneously detects left- and right-handed circularly polarized components, a long with a dual-measurement correction scheme to eliminate linear dichroi sm artifacts. Building on this platform, the project will investigate plas mon-coupled circular dichroism (PCCD) in DNA-functionalized gold nanorods at the single-particle level, to elucidate how molecular structure‚ orie ntation‚ and position influence chiroptical responses beyond ensemble-av eraged measurements․ Additionally, the study will also explore plexciton ic chirality in the systems composed of chiral helical plasmonic nanorods and J-aggregate excitons and understand the mechanism of strong coupling i n this chiral hybrid system. These advances will provide deep insight for the understanding of nanoscale chirality in the application of chiral sens ing, optical communication, and nanophotonics. Meeting ID: 955 2466 7221 P assword: 715764\nEvent page: https://www.umassd.edu/events/cms/phd-dissert ation-proposal-defense-by-angel-rose-thomas.php\nEvent link: https://umass d.zoom.us/j/95524667221?pwd=EGg0bjjvwlh5GvSbzpKW9LD8RbZrES.1 X-ALT-DESC;FMTTYPE=text/html:

Advisor: Dr. Wei-Shun Chang

Committee members: Dr. Shuowei Cai\, Dr. Milana Vasudev

Abstr act: Characterizing the chirality of plasmonic nanostructures at the singl e-particle level is crucial to reveal structure–optochirality relationsh ips. Single-particle dark-field scattering spectroscopy is commonly used t o measure circular differential scattering (CDS) owing to its high through put\, ease of implementation\, and high spectroscopic resolution. However\ , conventional CDS measurement setups suffer from linear dichroism artifac ts\, limiting measurement accuracy and leading to significant uncertainty in detecting weak chirality. To address these limitations\, this work aims to develop a modified CDS configuration that simultaneously detects left- and right-handed circularly polarized components\, along with a dual-meas urement correction scheme to eliminate linear dichroism artifacts. Buildin g on this platform\, the project will investigate plasmon-coupled circular dichroism (PCCD) in DNA-functionalized gold nanorods at the single-partic le level\, to elucidate how molecular structure‚ orientation‚ and posi tion influence chiroptical responses beyond ensemble-averaged measurements ․ Additionally\, the study will also explore plexcitonic chirality in th e systems composed of chiral helical plasmonic nanorods and J-aggregate ex citons and understand the mechanism of strong coupling in this chiral hybr id system. These advances will provide deep insight for the understanding of nanoscale chirality in the application of chiral sensing\, optical comm unication\, and nanophotonics.

Meeting ID: 955 2466 7221

P assword: 715764

Event page: https://www .umassd.edu/events/cms/phd-dissertation-proposal-defense-by-angel-rose-tho mas.php
Event link: https://umassd.zoom.us/j/95524667221? pwd=EGg0bjjvwlh5GvSbzpKW9LD8RbZrES.1

DTSTAMP:20260406T173753 DTSTART;TZID=America/New_York:20260421T153000 DTEND;TZID=America/New_York:20260421T173000 LOCATION:SENG-311/VIRTUAL SUMMARY;LANGUAGE=en-us:PhD Dissertation Proposal Defense by Angel Rose Thom as UID:16c1f49eae701013bd9066675ab4ae0f@www.umassd.edu END:VEVENT END:VCALENDAR