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Proceedings Paper

Particle shape analysis using whispering gallery mode polarization sensing (Conference Presentation)
Author(s): Cheng Li; Jiang Qiu; Adley Gin; Phuong-Diem Nguyen; Judith Su

Paper Abstract

Whispering-gallery mode (WGM) microtoroid optical resonators have been used for highly sensitive biological and chemical sensing. With the help of auto-balanced detection and data processing techniques, frequency locked optical whispering evanescent resonator (FLOWER) has successfully reduced external noise and achieved detection of single macromolecules. FLOWER, however, can only analyze the size of particles and not their shape. To determine the shape of non-spherical particles interacting with different polarized WGM modes, we built a dual-FLOWER system to perform multi-mode locking. We demonstrate the ability of this system to detect particle shape by detecting gold nanorods and spheres.

Paper Details

Date Published: 10 March 2020
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Proc. SPIE 11254, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVII, 1125404 (10 March 2020); doi: 10.1117/12.2545252
Show Author Affiliations
Cheng Li, The Univ. of Arizona (United States)
Jiang Qiu, The Univ. of Arizona (United States)
Adley Gin, The Univ. of Arizona (United States)
Phuong-Diem Nguyen, The Univ. of Arizona (United States)
Judith Su, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 11254:
Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVII
Dror Fixler; Ewa M. Goldys, Editor(s)

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