title: Single-beam coherent Raman spectroscopy and microscopy via spectral notch shaping.
abstract: We present a simple and easily implementable scheme for multiplexed Coherent Anti-Stokes Raman Scattering (CARS) spectroscopy and microscopy using a single femtosecond pulse, shaped with a narrow spectral notch. We show that a tunable spectral notch, shaped by a resonant photonic crystal slab, can serve as a narrowband, optimally time-delayed probe, resolving a broad vibrational spectrum with high spectral resolution in a single-shot measurement. Our single-source, single-beam scheme allows the simple transformation of any multiphoton microscope with adequate bandwidth into a nearly alignment-free CARS microscope.
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel. ori.katz@weizmann.ac.il
authors.forename: Ori
authors.initials: O
authors.lastname: Katz
authors.forename: Jonathan M
authors.initials: JM
authors.lastname: Levitt
authors.forename: Eran
authors.initials: E
authors.lastname: Grinvald
authors.forename: Yaron
authors.initials: Y
authors.lastname: Silberberg