Infrared scanning near-field optical microscopy (IR-SNOM) for thermal profiling of quantum cascade lasers

Trey B. Daunis; F. Abbas; Kevin P. Clark; E. Fuchs; K. Lascola; Y. Dikmelik; Kimari Hodges; Dennis I. Robbins; Max Platkov; Abraham Katzir; Q. Gu; Katy Roodenko

doi:10.1117/12.2585911

5 March 2021 Infrared scanning near-field optical microscopy (IR-SNOM) for thermal profiling of quantum cascade lasers

Trey B. Daunis, F. Abbas, Kevin P. Clark, E. Fuchs, K. Lascola, Y. Dikmelik, Kimari Hodges, Dennis I. Robbins, Max Platkov, Abraham Katzir, Q. Gu, Katy Roodenko

Author Affiliations +

Proceedings Volume 11635, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI; 116350Z (2021) https://doi.org/10.1117/12.2585911
Event: SPIE BiOS, 2021, Online Only

Abstract

In this work, we present the development of an infrared scanning near-field optical microscope (IR-SNOM) for thermal imaging. As an example, we explore thermal imaging of quantum cascade lasers (QCLs). QCLs are attractive infrared (IR) sources for chemical detection due to their tunability and wide emission range spanning from mid-wavelength to longwavelength infrared radiation (MWIR and LWIR). However, they require high performance cooling systems and have limited use at low power in continuous wave (CW) operation due to the potential for thermal failure of the device. Thermal imaging can help identify mechanisms and points of failure during laser operation. Because the size of the features of QCLs (~1 μm) are much smaller than the wavelength of the emitted thermal radiation, IR-SNOM is an ideal technique to image the spatial thermal profile of QCLs during operation to guide design improvement.

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Trey B. Daunis, F. Abbas, Kevin P. Clark, E. Fuchs, K. Lascola, Y. Dikmelik, Kimari Hodges, Dennis I. Robbins, Max Platkov, Abraham Katzir, Q. Gu, and Katy Roodenko "Infrared scanning near-field optical microscopy (IR-SNOM) for thermal profiling of quantum cascade lasers", Proc. SPIE 11635, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI, 116350Z (5 March 2021); https://doi.org/10.1117/12.2585911

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