Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
Chem Soc Rev. 2017 Jul 7;46(13):3980-3999. doi: 10.1039/c7cs00137a. Epub 2017 May 22.
Surface enhanced hyper Raman scattering (SEHRS) is the spontaneous, two-photon excited Raman scattering that occurs for molecules residing in high local optical fields of plasmonic nanostructures. Being regarded as a non-linear analogue of surface enhanced Raman scattering (SERS), SEHRS shares most of its properties, but also has additional characteristics. They include complementary spectroscopic information resulting from different selection rules and a stronger enhancement due to the non-linearity in excitation. In practical spectroscopy, this can translate to advantages, which include a high selectivity when probing molecule-surface interactions, the possibility of probing molecules at low concentrations due to the strong enhancement, and the advantages that come with excitation in the near-infrared. In this review, we give examples of the wealth of vibrational spectroscopic information that can be obtained by SEHRS and discuss work that has contributed to understanding the effect and that therefore provides directions for SEHRS spectroscopy. Future applications could range from biophotonics to materials research.
表面增强超拉曼散射（SEHRS）是一种自发的双光子激发拉曼散射，发生在等离子体纳米结构的高局域光场中的分子上。SEHRS 被视为表面增强拉曼散射（SERS）的非线性类似物，它具有大多数相同的特性，但也有一些额外的特性。它们包括由于不同的选择定则而产生的互补光谱信息，以及由于激发的非线性而导致的更强的增强。在实际光谱学中，这可以转化为一些优势，包括在探测分子-表面相互作用时具有高选择性，由于强增强而有可能探测低浓度的分子，以及在近红外激发的优势。在这篇综述中，我们给出了通过 SEHRS 获得的丰富的振动光谱信息的例子，并讨论了有助于理解这一效应的工作，从而为 SEHRS 光谱学提供了方向。未来的应用可能涵盖从生物光子学到材料研究。
