Free-space coupling to microtoroid optical resonator chemosensors

Euan McLeod; Jeffrey E. Melzer; Sartanee Suebka; Lei Chen; Cheng Li; Judith Su

doi:10.1117/12.2664167

14 June 2023 Free-space coupling to microtoroid optical resonator chemosensors

Euan McLeod, Jeffrey E. Melzer, Sartanee Suebka, Lei Chen, Cheng Li, Judith Su

Proceedings Volume PC12541, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIV; PC1254102 (2023) https://doi.org/10.1117/12.2664167
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Microtoroid resonators are one of the most sensitive chemical sensing technologies. However, coupling light into microtoroids typically requires equipment such as vibration-isolation tables and piezoelectric nanopositioning stages. Translating microtoroids to platforms with small size, weight, power, and cost for chemical vapor sensing remains a challenge. We demonstrate an approach to position photonic nanostructures on the surface of microtoroids to facilitate free-space coupling via inexpensive optics. We have designed the nanophotonic coupler using finite element simulations with novel boundary conditions to accommodate a large simulation domain. The nanophotonic coupler is assembled using a custom manufacturing platform based on automated optical tweezers.

Conference Presentation

Citation Download Citation

Euan McLeod, Jeffrey E. Melzer, Sartanee Suebka, Lei Chen, Cheng Li, and Judith Su "Free-space coupling to microtoroid optical resonator chemosensors", Proc. SPIE PC12541, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIV, PC1254102 (14 June 2023); https://doi.org/10.1117/12.2664167

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