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CATEGORIES:Seminar/Colloquia
DESCRIPTION:Title: Ultra-Sensitive Whispering Gallery Mode Resonators for P
 hotoacoustic Bio-Sensing and Imaging.\n\nAbstract: Whispering gallery mode 
 (WGM) microresonators are robust optical devices that have high sensitivity
 \, high quality factors\, small mode volume\, and strong light-matter inter
 action. In my presentation\, I will delve into the extensive applications o
 f WGM microresonators\, with a specific focus on their pivotal role in phot
 oacoustic biosensing and imaging. Even though the microresonators themselve
 s can detect very small sized particles utilizing a shift in resonance\, th
 ey have to rely on evanescent field interactions with molecules on the surf
 ace\, while molecules outside the range remain undetected. In this presenta
 tion we will introduce a novel approach\, proposing the generation of photo
 acoustic signals with a pulsed laser and the detection of photoacoustic sig
 nals through the microresonator\, to enable subsequent imaging or biomolecu
 le detection. We were able to distinguish and classify three types of bacte
 ria cells from human wound sample using the inherent microfluidic channel o
 f microbubble resonator using this approach. Additionally\, we demonstrated
  the versatility of this method by detecting glucose concentration in solut
 ions. In the later part of my talk\, I will present an optically transparen
 t packaged microbubble resonator for Photoacoustic Microscopy (PAM). It’s h
 igh Q-factor enables phantom imaging with high sensitivity\, offering a com
 pact\, sensitive alternative to the conventional transducer while having si
 mple fabrication process.
DTEND:20250418T160000Z
DTSTAMP:20260312T193531Z
DTSTART:20250418T140000Z
GEO:38.648882;-90.302207
LOCATION:Stephen F. & Camilla T. Brauer Hall\, 3015
SEQUENCE:0
SUMMARY:ESE defense | Dipayon Sikder
UID:tag:localist.com\,2008:EventInstance_49357000964281
URL:https://happenings.washu.edu/event/ese-defense-dipayon-sikder
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