Higher-order multiphoton imaging by femtosecond near-infrared laser microscope system

Hirohisa Matsuda, Syoji Ito, Yutaka Nagasawa, Tsuyoshi Asahi, Hiroshi Masuhara, Seiya Kobatake, Masahiro Irie, Hiroshi Miyasaka*

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Near-infrared (NIR) femtosecond laser microscope with Cr:Forsterite laser at ca. 1.26 μm output wavelength was constructed and applied to two-, three- and four-photon imaging of gold nanoparticle and some organic micro crystals. The ultrafast pulse duration of 35 fs after passing through the objectives easily induced higher-order multiphoton absorption. The size of the laser focal spot and the resolution along the optical axis were discussed by comparing the present higher-order multiphoton imaging and two-photon induced processes.

Original languageEnglish
Pages (from-to)261-266
Number of pages6
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume183
Issue number3
DOIs
StatePublished - 25 Oct 2006

Keywords

  • Chromium:forsterite laser
  • Four-photon imaging
  • Near-infrared femtosecond microscopy
  • Three-photon imaging

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