Bachler Brandon R, Fermann Martin E, Ogilvie Jennifer P
Department of Physics and Biophysics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Opt Express. 2012 Jan 16;20(2):835-44. doi: 10.1364/OE.20.000835.
We report spectrally-resolved chemical imaging based on Raman induced Kerr effect spectroscopy (RIKES). When used with circularly-polarized pump excitation, multiplex RIKES offers the potential for spectrally-resolved imaging free of the nonresonant background that plagues coherent anti-Stokes Raman scattering. RIKES does however have a highly sample-dependent birefringent background that limits its sensitivity and can introduce spectral distortions. We demonstrate that in low birefringence samples multiplex RIKES microscopy offers an enhanced signal-to-noise ratio compared to multiplex stimulated Raman scattering (SRS) when implemented in a high polarization-purity, low frequency chopping scheme.
我们报道了基于拉曼诱导克尔效应光谱（RIKES）的光谱分辨化学成像。当与圆偏振泵浦激发一起使用时，多重RIKES提供了进行光谱分辨成像的潜力，可避免困扰相干反斯托克斯拉曼散射的非共振背景。然而，RIKES确实存在高度依赖样品的双折射背景，这限制了其灵敏度并可能引入光谱畸变。我们证明，在低双折射样品中，当采用高偏振纯度、低频斩波方案实施时，多重RIKES显微镜与多重受激拉曼散射（SRS）相比，具有更高的信噪比。
