Index Catalog // ScholarsArchive@OSU

Creator:: Han, Fangyuan, Liu, Weimin, and Fang, Chong
Abstract:: We use femtosecond stimulated Raman spectroscopy (FSRS) to illuminate the choreography of intermolecular excited-state proton transfer (ESPT) of photoacid pyranine (8-hydroxypyrene-1,3,6-trisulfonic acid, HPTS) in water. The multidimensional reaction coordinate responsible for photoacidity is revealed to involve sequential activation of characteristic skeletal motions during the ca. 1 ps preparation stage preceding...
Resource Type:: Article
Full Text:: Spectroscopy Fangyuan Han, Weimin Liu, and Chong Fang* Department of Chemistry, Oregon State

Creator:: Zhu, Liangdong, Liu, Weimin, and Fang, Chong
Abstract:: We demonstrate the generation of broadband up-converted multicolor array (BUMA) in a thin BK7 glass slide using two noncollinear weak near-IR laser pulses with various crossing angles. The BUMA signal arises from cubic nonlinear χ⁽³⁾:χ⁽³⁾ processes via cascaded four-wave mixing of the two incident beams. Broad and continuous tunability of...
Resource Type:: Article
Full Text:: spectroscopy Liangdong Zhu,1 Weimin Liu,2 and Chong Fang2,a) 1Department of Physics, Oregon State University

Creator:: Liu, Weimin, Zhu, Liangdong, and Fang, Chong
Abstract:: We demonstrate the simultaneous generation of multicolor femtosecond laser pulses spanning the wavelength range from UV to near IR in a 0.1 mm Type I beta-barium borate crystal from 800 nm fundamental and weak IR super-continuum white light (SCWL) pulses. The multicolor broadband laser pulses observed are attributed to two...
Resource Type:: Article
Full Text:: multicolor spectroscopy. © 2012 Optical Society of America OCIS codes: 320.7110, 320.2250, 190.4380, 190.4160

Creator:: Liu, Weimin, Zhu, Liangdong, Wang, Liang, and Fang, Chong
Abstract:: We demonstrate the versatile broadband wavelength tunability of frequency upconverted multicolor cascaded fourwave-mixing (CFWM) signals spanning the continuous wavelength range from UV to near IR in a thin type-I BBO crystal using 35 fs, 800 nm fundamental and chirped IR supercontinuum white light pulses. Two sets of spatially dispersed CFWM...
Resource Type:: Article
Full Text:: setup is readily applicable for multi- color ultrafast molecular spectroscopy, such as femto- second

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