Department of Physics, University of Ottawa, Ottawa, Ontario, Canada.
Opt Lett. 2012 Feb 15;37(4):473-5. doi: 10.1364/OL.37.000473.
We investigate the role of a spatially inhomogenous nonresonant background medium on several Raman-based imaging modalities. In particular, we consider a small resonant bead submerged in a spatially heterogeneous nonresonant χ(3) background. Using detailed 3D electrodynamic simulations, we compare coherent anti-Stokes Raman scattering (CARS), frequency-modulated CARS, amplitude-modulated stimulated Raman scattering (SRS), and frequency-modulated SRS. We find that only FM-SRS is background-free.
我们研究了空间不均匀非共振背景介质对几种基于拉曼的成像模式的影响。具体来说，我们考虑了一个小的共振珠浸在空间不均匀的非共振 χ(3)背景中。通过详细的三维电动力学模拟，我们比较了相干反斯托克斯拉曼散射（CARS）、频移 CARS、调幅受激拉曼散射（SRS）和频移 SRS。我们发现只有调频 SRS 是无背景的。
