Fast mid-infrared imaging through non-degenerate two-photon absorption in an CMOS camera

Eric O. Potma; Dave Knez; Dmitry A. Fishman

doi:10.1117/12.2595758

1 August 2021 Fast mid-infrared imaging through non-degenerate two-photon absorption in an CMOS camera

Eric O. Potma, Dave Knez, Dmitry A. Fishman

Proceedings Volume 11825, Ultrafast Nonlinear Imaging and Spectroscopy IX; 118250K (2021) https://doi.org/10.1117/12.2595758
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Chemical imaging based on mid-infrared (MIR) spectroscopic contrast is an important technique with a myriad of applications, including biomedical imaging and environmental monitoring. Current MIR cameras, however, lack in performance and are much less affordable compared to mature Si-based devices, which operate in the visible and near-infrared. We demonstrate fast MIR imaging through non-degenerate two-photon absorption (NTA) in a scientific CMOS camera. We show that wide-field MIR images can be obtained at more than 100 frames/s with energies of only a few fJ per pixel. This on-chip approach does not rely on phase-matching, it is alignment-free and it does not necessitate complex post-processing of the images. We show chemically selective MIR imaging of polymers and biological samples, including MIR videos of live organisms and complete 3D volumetric images of objects acquired at rates as fast as 1 volume/s.

Conference Presentation

Citation Download Citation

Eric O. Potma, Dave Knez, and Dmitry A. Fishman "Fast mid-infrared imaging through non-degenerate two-photon absorption in an CMOS camera", Proc. SPIE 11825, Ultrafast Nonlinear Imaging and Spectroscopy IX, 118250K (1 August 2021); https://doi.org/10.1117/12.2595758

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