Nonresonant dielectric hole burning spectroscopy of supercooled liquids

B. Schiener, Ralph Chamberlin, G. Diezemann, R. Böhmer

Research output: Contribution to journalArticle

143 Scopus citations

Abstract

The nonexponential response of propylene carbonate and glycerol near their glass transitions could be selectively altered using nonresonant spectral hole burning (NSHB) experiments. This observation provides evidence of the existence of a distribution of relaxation times in these supercooled liquids. NSHB is based on a pump, wait, and probe scheme and uses low-frequency large amplitude electrical fields to modify the dielectric relaxation. The temporal evolution of the polarization of the sample is then measured subsequent to a small voltage step. By variation of a recovery time inserted between pump and probe, the refilling of the spectral features could be monitored and was found to take place on the time scale set by the peak in the distribution. The recovery time and pump frequency dependences of the spectral modifications were successfully simulated using a set of coupled rate equations.

Original languageEnglish (US)
Pages (from-to)7746-7761
Number of pages16
JournalJournal of Chemical Physics
Volume107
Issue number19
DOIs
StatePublished - Nov 15 1997

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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