Development of near-infrared 35 fs laser microscope and its application to the detection of three- and four-photon fluorescence of organic microcrystals

Hirohisa Matsuda, Yousuke Fujimoto, Syoji Ito, Yutaka Nagasawa, Hiroshi Miyasaka*, Tsuyoshi Asahi, Hiroshi Masuhara

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Femtosecond near-infrared laser microscope was developed with a home-built cavity-dumped chromium: forsterite laser as a light source centered at 1.26 μm. Optimization of the pulse duration achieved 35 fs fwhm at the sample position of the microscope after passing through a 100 × objective. This system was applied to the detection of multiphoton fluorescence of some organic microcrystals. Excitation intensity dependence and the interferometric autocorrelation detection of the fluorescence clearly demonstrated that simultaneous three- and four-photon absorption processes are responsible for the production of the excited state for perylene and anthracene microcrystals, respectively. The spatial resolution along the optical axis and its dependence on the order of the multiphoton process were also discussed.

Original languageEnglish
Pages (from-to)1091-1094
Number of pages4
JournalJournal of Physical Chemistry B
Volume110
Issue number3
DOIs
StatePublished - 26 Feb 2006

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