Multimode Sensing by Optical Whispering-gallery-mode Barcodes: A New Route to Expand Dynamic Range for High-resolution Measurement.

ABSTRACT: Sensors play a vital role in detecting and quantifying various parameters relevant to the physical and biochemical aspects of the world. In the field of optical sensing, Whispering-Gallery-Mode (WGM) microresonators have emerged as promising candidates, offering the advantages of high sensitivity, high resolution, and small footprint. However, conventional sensing methods, which rely on tracking changes in a single mode, have a limited dynamic range of measurement. In this study, we develop a theoretical framework that offers comprehensive analytical insights for multimode-sensing techniques. We demonstrate an optical WGM barcode technique that enables simultaneous monitoring of the patterns of multiple modes that can provide over-FSR (Free spectral range) tracking with high resolution. By

SUBMITTER: Liao J 

PROVIDER: S-EPMC12269905 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature