Detection of electronic excited states in conjugated polymers by picosecond transient strain spectroscopy

Journal Article · Mon Feb 27 00:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.1685· OSTI ID:6493620

Kanner, G S; Frolov, S; Vardeny, Z V ^[1]

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1. Los Alamos National Laboratory, CST4, MS G755, Los Alamos, New Mexico 87545 (United States) Physics Department, University of Utah, Salt Lake City, Utah 84112 (United States)

We describe a new type of spectroscopy based on picosecond transient strain in absorption photomodulation that can be used to detect and identify both allowed and forbidden optical transitions in solid thin films. We have applied the new spectroscopy to a variety of conducting polymer films such as polythiophene, [ital trans] and [ital cis] polyacetylene, and poly(diethynyl-silane), in which we measured energy levels of various excitonic states with odd and even symmetry that are, respectively, allowed and forbidden in the optical absorption.

• DOE Contract Number: FG03-93ER45490
• OSTI ID: 6493620
• Journal Information: Physical Review Letters; (United States), Vol. 74:9; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPOLYMERS
LASER SPECTROSCOPY
ABSORPTION SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITONS
FORBIDDEN TRANSITIONS
MODULATION
PHOTO-INDUCED TRANSIENT SPECTROSCOPY
STRAINS
THIN FILMS
FILMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
QUASI PARTICLES
SPECTRA
SPECTROSCOPY
360606* - Other Materials- Physical Properties- (1992-)