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Total Internal Reflection of Two Lasers in a Single Planar Optical Waveguide

Journal Article · · ECS Sensors Plus
Multiplex biomarker quantitation is ideal for tracking the progression of a disease, but sensitive, specific, and quantitative multiplex biosensing remains challenging. We achieved total internal reflection with two lasers in a single planar optical waveguide by coupling 532 nm laser light into the diffraction grating of a waveguide and 635 nm laser light directly into the thin film of the same waveguide. We confirmed that the evanescent fields generated in the waveguide can excite two fluorescent dyes (Alexa Fluor 532 and Alexa Fluor 647) held to the surface of the waveguide through biotin-streptavidin chemistry. This sensing concept holds significant potential as a platform for multiplex biomarker detection.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
U.S. Department of Defense (DOD); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1869626
Report Number(s):
LA-UR-22-21004
Journal Information:
ECS Sensors Plus, Journal Name: ECS Sensors Plus Journal Issue: 2 Vol. 1; ISSN 2754-2726
Publisher:
IOP ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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