Author/Authors :
Matsuda، نويسنده , , Hirohisa and Ito، نويسنده , , Syoji and Nagasawa، نويسنده , , Yutaka and Asahi، نويسنده , , Tsuyoshi and Masuhara، نويسنده , , Hiroshi and Kobatake، نويسنده , , Seiya and Irie، نويسنده , , Masahiro and Miyasaka، نويسنده , , Hiroshi، نويسنده ,
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.
Keywords :
Chromium:forsterite laser , Near-infrared femtosecond microscopy , Three-photon imaging , Four-photon imaging
