Complementary vibrational spectroscopy

Kazuki Hashimoto, Venkata Ramaiah Badarla, Akira Kawai and Takuro Ideguchi ()
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Kazuki Hashimoto: The University of Tokyo
Venkata Ramaiah Badarla: The University of Tokyo
Akira Kawai: The University of Tokyo
Takuro Ideguchi: The University of Tokyo

Nature Communications, 2019, vol. 10, issue 1, 1-6

Abstract: Abstract Vibrational spectroscopy, comprised of infrared absorption and Raman scattering spectroscopy, is widely used for label-free optical sensing and imaging in various scientific and industrial fields. The two molecular spectroscopy methods are sensitive to different types of vibrations and provide complementary vibrational spectra, but obtaining complete vibrational information with a single spectroscopic device is challenging due to the large wavelength discrepancy between the two methods. Here, we demonstrate simultaneous infrared absorption and Raman scattering spectroscopy that allows us to measure the complete broadband vibrational spectra in the molecular fingerprint region with a single instrument based on an ultrashort pulsed laser. The system is based on dual-modal Fourier-transform spectroscopy enabled by efficient use of nonlinear optical effects. Our proof-of-concept experiment demonstrates rapid, broadband and high spectral resolution measurements of complementary spectra of organic liquids for precise and accurate molecular analysis.

Date: 2019
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DOI: 10.1038/s41467-019-12442-9

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