A Fast, Coherent Look At Single-Molecule Vibrations | Chemical & Engineering News
 
 
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Volume 92 Issue 28 | p. 31 | Concentrates
Issue Date: July 14, 2014

A Fast, Coherent Look At Single-Molecule Vibrations

Coherent anti-Stokes Raman-scattering signals, acquired in femtoseconds, don’t dephase like ensemble measurements
Department: Science & Technology
News Channels: Analytical SCENE
Keywords: single-molecule spectroscopy, Raman, CARS, time-resolved spectroscopy, ultrafast

Ultrafast nonlinear spectroscopy in which scientists excite a molecule with optical pulses and then use a probe pulse to see what happens allows researchers to observe the motions of chemical bonds. But such measurements are usually made of large ensembles of molecules and are limited to time­scales over which the molecular motions of the ensemble remain coherent. Vartkess A. Apkarian, Eric O. Potma, and coworkers . . .

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