Infrared chemical imaging with a silicon-based camera using non-degenerate two photon absorption

David Knez; Adam Hanninen; Richard Prince; Dmitry A. Fishman; Eric Potma

doi:10.1117/12.2578965

5 March 2021 Infrared chemical imaging with a silicon-based camera using non-degenerate two photon absorption

David Knez, Adam Hanninen, Richard Prince, Dmitry A. Fishman, Eric Potma

Proceedings Volume 11654, High-Speed Biomedical Imaging and Spectroscopy VI; 1165406 (2021) https://doi.org/10.1117/12.2578965
Event: SPIE BiOS, 2021, Online Only

Abstract

Nondegenerate two-photon absorption (NTA) is a method for detecting infrared (IR) radiation with wide bandgap photodetectors. We use NTA to detect mid IR (MIR) light on a Si-based detector with the aid of a near-IR (NIR) pump beam. This enables the use of mature, robust Si technologies to detect IR light at room temperature. We show that NTA facilitates MIR spectroscopy in both a single pixel photodiode and a high-resolution CCD, allowing for chemically selective MIR imaging. We demonstrate the utility of NTA by including MIR images and videos of moving targets.

Conference Presentation

Citation Download Citation

David Knez, Adam Hanninen, Richard Prince, Dmitry A. Fishman, and Eric Potma "Infrared chemical imaging with a silicon-based camera using non-degenerate two photon absorption", Proc. SPIE 11654, High-Speed Biomedical Imaging and Spectroscopy VI, 1165406 (5 March 2021); https://doi.org/10.1117/12.2578965

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