Browsing by Author "Tokunaga, E."

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Chirped molecular vibration after impulsive Raman excitation in a stilbene derivative molecule in solution
(2007)
Kobayashi, T.
;
Colonna, A.
;
Yabushita, A.
;
Iwakura, I.
;
Tokunaga, E.
The vibrational dynamics in 4-methoxy-4\'-nitrostilbene in a condensed phase was studied by fermosecond pump-probe spectroscopy and quantum-chemical calculation. Transient changes in absorbance due to bleaching exhibit oscillations reflecting chirped molecular vibrational on the potential surface.
Multiplex stimulated Raman imaging with white probe-light from a photonic-crystal fibre and with multi-wavelength balanced detection
(2014-08-30)
Seto, K.
;
Okuda, Y.
;
Tokunaga, E.
;
Kobayashi, T.
;
電子物理學系
A straightforward method for spectral stimulated Raman scattering (SRS) microscopy is to measure the scanned gain/loss spectrum of a white probe light from a photonic crystal fibre (PCF). However, the intensity of the white light noise is a serious problem for SRS microscopy. In this study, we have demonstrated simultaneous two-wavelength SRS microscopy with PCF through balanced detection suitable for spectroscopy with a modification of an auto-balance scheme. The developed auto-balance detection system suppresses the degradation of noise cancellation performance caused by a sample, and is suitable for spectral SRS imaging with simple and robust optics.
Multiplex stimulated Raman imaging with white probe-light from a photonic-crystal fibre and with multi-wavelength balanced detection
(2014-08-30)
Seto, K.
;
Okuda, Y.
;
Tokunaga, E.
;
Kobayashi, T.
;
電子物理學系
A straightforward method for spectral stimulated Raman scattering (SRS) microscopy is to measure the scanned gain/loss spectrum of a white probe light from a photonic crystal fibre (PCF). However, the intensity of the white light noise is a serious problem for SRS microscopy. In this study, we have demonstrated simultaneous two-wavelength SRS microscopy with PCF through balanced detection suitable for spectroscopy with a modification of an auto-balance scheme. The developed auto-balance detection system suppresses the degradation of noise cancellation performance caused by a sample, and is suitable for spectral SRS imaging with simple and robust optics.