Thermal lens signal enhancement by utilizing two excitation laser pulses

Akihide Hibara, Kazuma Mawatari, Takehiko Kitamori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper reports a novel thermal lens microscope utilizing two laser pulses for excitation in order to enhance thermal lens signal via repetitive excitation-relaxation by the second pulse. The two-color excitation thermal lens microscope (TCE-TLM) system showed 80-times higher signal than a single-beam excitation TLM. By controlling duration between the two excitation pulses, TCE-TLM can measure non-radiative lifetime of photoexcited triplet state. The lifetime measurement can be applied to qualitative analysis, which cannot be realized in normal TLM.

Original languageEnglish
Title of host publicationMicro Total Analysis Systems - Proceedings of MicroTAS 2005 Conference
Subtitle of host publication9th International Conference on Miniaturized Systems for Chemistry and Life Sciences
PublisherTransducer Research Foundation
Pages1488-1490
Number of pages3
Volume1
ISBN (Print)0974361119, 9780974361116
Publication statusPublished - 2005 Jan 1
Externally publishedYes
Event9th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2005 - Boston, MA, United States
Duration: 2005 Oct 92005 Oct 13

Other

Other9th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2005
CountryUnited States
CityBoston, MA
Period05/10/905/10/13

Keywords

  • Laser spectroscopy
  • Thermal lens microscope
  • Trace analysis
  • Transient absorption

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Bioengineering

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