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Proceedings Paper

Dynamics and vibrational spectra of individual molecules in polymer glasses
Author(s): Anne B. Myers; Paul Tchenio; William E. Moerner
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Paper Abstract

Fluorescence excitation and vibrationally resolved dispersed fluorescence spectra of single molecules of terrylene in a polyethylene matrix at 1.5 K are presented. Single molecules are selected from the inhomogeneous ensemble by tuning a narrow-band dye laser into resonance with the sharp electronic origin features in highly dilute samples. Total fluorescence is detected with a photomultiplier and photon counting electronics, while vibrationally resolved fluorescence spectra are obtained by dispersing the emission onto a CCD detector. The excitation spectra reveal a variety of spectral diffusion effects on a wide range of time scales, including both continuous wandering over a range of frequencies and jumping among two or more discrete resonance frequencies. The dispersed fluorescence spectra show two distinct types of vibrational frequency and intensity patterns, possibly arising from terrylene molecules in the amorphous and crystalline regions of the polyethylene matrix, respectively. The description of the emission as resonance Raman or fluorescence is discussed.

Paper Details

Date Published: 7 April 1995
PDF: 12 pages
Proc. SPIE 2385, Advanced Optical Methods for Ultrasensitive Detection, (7 April 1995); doi: 10.1117/12.206437
Show Author Affiliations
Anne B. Myers, IBM Almaden Research Ctr. (United States)
Paul Tchenio, IBM Almaden Research Ctr. (United States)
William E. Moerner, IBM Almaden Research Ctr. (United States)

Published in SPIE Proceedings Vol. 2385:
Advanced Optical Methods for Ultrasensitive Detection
Bryan L. Fearey, Editor(s)

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