Browsing by Author "Fuji, T."

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Chirped-pulse upconversion of mid-infrared pulses with four-wave difference frequency generation in gases
(2013)
Fuji, T.
;
Nomura, Y.
;
Wang, Y-T
;
Yabushita, A.
;
Luo, C-W
Single-shot detection of mid-infrared spectra from 250 to 5500 cm(-1) with 5 cm(-1) resolution was demonstrated by using chirped-pulse upconversion with four-wave difference frequency generation in gases
Single-shot detection of mid-infrared spectra by chirped-pulse upconversion with four-wave difference frequency generation in gases
(2013-07-29)
Nomura, Y.
;
Wang, Y. -T.
;
Kozai, T.
;
Shirai, H.
;
Yabushita, A.
Single-shot detection of ultrabroadband mid-infrared spectra was demonstrated by using chirped-pulse upconversion technique with four-wave difference frequency generation in gases. Thanks to the low dispersion of the gas media, the bandwidth of the phase matching condition of the upconversion process becomes very broad and the entire mid-infrared spectrum spanning from 200 to 5500 cm(-1) was upconverted by using a 10 ps chirped pulse to visible wavelength radiation, which was detected with a conventional visible dispersive spectrometer. This method was demonstrated by the successful measurement of infrared absorption spectra of organic polymer films. (C) 2013 Optical Society of America
Time-resolved photoelectron imaging using a femtosecond UV laser and a VUV free-electron laser
(2010-03-01)
Liu, S. Y.
;
Ogi, Y.
;
Fuji, T.
;
Nishizawa, K.
;
Horio, T.
A time-resolved photoelectron imaging using a femtosecond ultraviolet (UV) laser and a vacuum UV free-electron laser is presented. Ultrafast internal conversion and intersystem crossing in pyrazine in a supersonic molecular beam were clearly observed in the time profiles of photoioinzation intensity and time-dependent photoelectron images.