Doubly resonant IR-UV sum-frequency vibrational spectroscopy on molecular chirality
Doubly resonant IR-UV sum-frequency vibrational spectroscopy on molecular chirality
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DOI：
10.1103/physrevlett.91.213907
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发表时间：
2003-11-21
影响因子：
8.6
通讯作者：
Shen, YR
中科院分区：
文献类型：
--
作者：
Belkin, MA;Shen, YR
我们从理论和实验上表明，在电子跃迁附近的和频振动光谱，手性响应的共振增强可以比非手性响应强得多。双共振谱通过它们不同的电子-振动耦合选择性地增强振动模式。这种异常强的共振增强效应显著提高了手性光谱的灵敏度，并首次实现了对单分子层手性振动光谱的检测。
We show theoretically and experimentally that for sum-frequency vibrational spectroscopy near electronic transitions, resonant enhancement of the chiral response can be much stronger than that of the achiral response. The doubly resonant spectrum selectively enhances the vibrational modes through their different electron-vibration couplings. The unusually strong resonant enhancement significantly improves sensitivity of chiral spectroscopy and allows detection of the chiral vibrational spectrum of a molecular monolayer for the first time.