Nearly degenerate two-color impulsive coherent Raman hyperspectral imaging
- Colorado State University, Fort Collins, CO (United States)
- 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)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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