Aix-Marseille Université, CNRS, Centrale Marseille, Institut Fresnel, UMR 7249, Domaine Universitaire de Saint Jérôme, F-13397 Marseille Cedex 20, France.
Phys Rev Lett. 2014 Feb 7;112(5):053905. doi: 10.1103/PhysRevLett.112.053905. Epub 2014 Feb 6.
We propose a three-color, double-modulation scheme for the background-free detection of stimulated Raman scattering (SRS). We call the scheme stimulated Raman gain and opposite loss detection (SRGOLD). It exploits the symmetric nature of potential parasitic signals (cross phase modulation, two-photon absorption, and thermal effects) to the end of suppressing them. Conversely, the antisymmetric nature of SRS provides for a twofold increase in the magnitude of the SRS signal. We experimentally demonstrate SRGOLD spectroscopy and microscopy on test samples as well as on mice skin samples.
我们提出了一种用于无背景检测受激拉曼散射（SRS）的三波长双调制方案，称之为受激拉曼增益和相反损耗检测（SRGOLD）。该方案利用潜在寄生信号（交叉相位调制、双光子吸收和热效应）的对称特性来抑制这些信号。相反，SRS 的非对称特性使得 SRS 信号的幅度增加了一倍。我们在测试样品以及小鼠皮肤样品上进行了 SRGOLD 光谱和显微镜实验演示。
