Author : Steven Yampolsky
Publisher :
ISBN 13 : 9781321094480
Total Pages : 33 pages
Book Rating : 4.0/5 (944 download)
Book Synopsis Time-resolved Measurement of Vibrational Coherences in the Single Molecule Limit by : Steven Yampolsky
Download or read book Time-resolved Measurement of Vibrational Coherences in the Single Molecule Limit written by Steven Yampolsky and published by . This book was released on 2014 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-resolved, surface-enhanced, coherent anti-Stokes Raman spectroscopy (tr-SECARS) is ideally suited for preparing and interrogating vibrational coherences on single molecules. We have succeeded in the rst demonstration of this concept through measurements carried out on molecules attached to gold nanosphere pairs which act as plasmonic nano-dumbell antennae. The tr-SECARS traces provide unique signatures of coherent evolution in discrete ensembles. The signals are characterized by phase and amplitude noise, which can be cast in terms of amplitude probability distribution functions (PDF), which allow rigorous distinction between single, few, and many molecule coherences. We give a brief background on tr-CARS, the experimental system for carrying out tr-SECARS and the analysis of the results in terms of PDFs. The analysis makes it clear that we have, for the rst time, observed the coherent vibrational motion of a single molecule.