title: Broadband coherent Raman spectroscopy running at 24,000 spectra per second.
abstract: We present a Fourier-transform coherent anti-Stokes Raman scattering (FT-CARS) spectroscopy technique that achieves broadband CARS measurements at an ultrahigh scan rate of more than 20,000 spectra/s - more than 20 times higher than that of previous broadband coherent Raman scattering spectroscopy techniques. This is made possible by an integration of a FT-CARS system and a rapid-scanning retro-reflective optical path length scanner. To demonstrate the technique's strength, we use it to perform broadband CARS spectroscopy of the transient mixing dynamics of toluene and benzene in the fingerprint region (200-1500 cm(-1)) with spectral resolution of 10 cm(-1) at a record high scan rate of 24,000 spectra/s. Our rapid-scanning FT-CARS technique holds great promise for studying chemical dynamics and wide-field label-free biomedical imaging.
authors.affiliation: Department of Chemistry, University of Tokyo-7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Hashimoto
authors.affiliation: Department of Chemistry, University of Tokyo-7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Megumi
authors.initials: M
authors.lastname: Takahashi
authors.affiliation: Research Centre for Spectrochemistry, University of Tokyo-7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Takuro
authors.initials: T
authors.lastname: Ideguchi
authors.affiliation: Department of Chemistry, University of Tokyo-7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.|Department of Electrical Engineering, University of California, Los Angeles-Los Angeles, CA 90095, USA.|Japan Science and Technology Agency-7 Gobancho, Chiyoda-ku, Tokyo 102-0076, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Goda