Nanoscale IR spectroscopy and imaging with a versatile broadband IR laser source

Qichi Hu; Honghua Yang

doi:10.1117/12.2583171

5 March 2021 Nanoscale IR spectroscopy and imaging with a versatile broadband IR laser source

Qichi Hu, Honghua Yang

Proceedings Volume 11635, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI; 116350X (2021) https://doi.org/10.1117/12.2583171
Event: SPIE BiOS, 2021, Online Only

Abstract

We demonstrate a state-of-the-art nanoIR instrument that integrates a broadband mid-IR OPO/DFG system from APE GmbH with a scanning probe system from Bruker. This broadband laser covers an extended wavelength range, and works in both broadband and narrowband modes. The broadband mode covers the range of 670-4000 cm^-1 (2.5-15 μm) allowing fast acquisition of s-SNOM spectrum. The narrowband mode covers the range of 670-2200 cm^-1 (4.5-15 μm), giving access to key molecular vibrational modes commonly used for chemical identification in the “fingerprint” region. With its higher spectral resolution, the narrowband enables s-SNOM imaging at defined IR wavelength, as well as AFM-IR spectroscopy and imaging. The comprehensive capabilities and performance of this combined system are highlighted by the high quality results obtained from several representative samples including 2D material, polymer film and biological sample.

Conference Presentation

Citation Download Citation

Qichi Hu and Honghua Yang "Nanoscale IR spectroscopy and imaging with a versatile broadband IR laser source", Proc. SPIE 11635, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI, 116350X (5 March 2021); https://doi.org/10.1117/12.2583171

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