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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publicationOptical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI
EditorsIsrael Gannot, Katy Roodenko
PublisherSPIE
ISBN (Electronic)9781510641051
DOIs
StatePublished - 2021
EventOptical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI 2021 - Virtual, Online, United States
Duration: 6 Mar 202111 Mar 2021

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume11635
ISSN (Print)1605-7422

Conference

ConferenceOptical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI 2021
Country/TerritoryUnited States
CityVirtual, Online
Period6/03/2111/03/21

Keywords

  • Infrared
  • QCL
  • SNOM
  • Scanning microscopy
  • Thermal analysis
  • Thermal imaging

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