Nearly degenerate two-color impulsive coherent Raman hyperspectral imaging

Journal Article · Tue Nov 08 00:00:00 EST 2022 · Optics Letters

DOI:https://doi.org/10.1364/ol.467970· OSTI ID:2234020

Smith, David R. ^[1]; Shivkumar, Siddarth ^[2]; Field, Jeff  ^[1]; Wilson, Jesse W.  ^[1]; Rigneault, Hervé ^[2]; Bartels, Randy A.  ^[1]

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1. Colorado State University, Fort Collins, CO (United States)
2. CNRS, Marseille (France)

Impulsive stimulated Raman scattering (ISRS) is a robust technique for studying low frequency (<300 cm ⁻¹ ) Raman vibrational modes, but ISRS has faced difficulty in translation to an imaging modality. A primary challenge is the separation of the pump and probe pulses. Here we introduce and demonstrate a simple strategy for ISRS spectroscopy and hyperspectral imaging that uses complementary steep edge spectral filters to separate the probe beam detection from the pump and enables simple ISRS microscopy with a single-color ultrafast laser source. ISRS spectra are obtained that span from the fingerprint region down to <50 cm ⁻¹ vibrational modes. Hyperspectral imaging and polarization-dependent Raman spectra are also demonstrated.

• Research Organization: Mesa Photonics, LLC, Santa Fe, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: SC0019545; FOA-0002603
• OSTI ID: 2234020
• Alternate ID(s): OSTI ID: 1897341
• Journal Information: Optics Letters, Vol. 47, Issue 22; ISSN 0146-9592
• Publisher: Optical Society of America (OSA)
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
Raman microscopy
coherent Raman scattering
stimulated Raman
impulsive stimulated Raman scattering
Raman imaging