红外和raman光谱学.pdf

红外和Raman光谱学 物理系 王冠中 Tel. email: gzwang@ustc.edu.cn 第一章：红外和Raman光谱介绍 • 什么是红外光谱？什么是Raman光谱 • 红外谱仪和Raman谱仪 • 红外光谱和Raman光谱方法的特点 • 红外光谱和Raman光谱研究的基本问题 红外和Raman光谱举例 Quantum memory: Phonons in diamond crystals Through Raman scattering, a write laser pulse creates a lower-energy Stokes photon (red) and an optical phonon in the diamond lattice. The optical phonon is a single excitation of a vibration mode in which nearest-neighbour carbon atoms move in opposite directions. A read laser pulse then converts this phonon into an anti-Stokes photon (blue). Nature Photonics , 6, 10 (2012) 2 (a) Polarized IR spectra of the Azo-PI film with a LPL exposure of 320 J=cm . (b) Polarized IR spectra of the pentacene films on 11 J=cm2 and 320 J=cm2 exposed Azo-PI. (c) LPL exposure dependence of DR (A /A ) of the Azo-PI films (1370 cm-1 band) and the pentacene   films (905 cm-1 band). (Phys. Rev. Lett., 101, 236103 (2008)) High-frequency first- and second-order First order-allowed Raman G- micro-Raman spectra of nGL films band for supported nGL films supported on a SiO2:Si substrate and vs number of layers n. HOPG Nano Lett ., 6 (12), 2667(06) In situ probing of biological structures by SHINERS. JF Li et al. Nature 464, 392-395 (2010) doi:10.1038/nature08907 Raman Spectrum of Si (300 K) ) u. Rayleigh (Elastic) Scattering Stokes a.