Broadband coherent anti-Stokes Raman scattering spectroscopy in supercontinuum optical trap

The authors report on a supercontinuum tweezer which combines tweezing with broadband (∼3000cm−1) coherent anti-Stokes Raman scattering (CARS) spectroscopy by taking advantage of the high spatial coherence and broad bandwidth of pulsed supercontinuum generated in a nonlinear photonic crystal fiber. Polarization-discriminated and time-resolved CARS is investigated to suppress the nonresonant four-wave-mixing background.