Pump-Probe Time-Resolved Sum Frequency Spectroscopy of the H-Si(111)1×1 surface

We have performed time-resolved sum frequency (SF) spectroscopy of a H-Si(111)1×1 surface excited by pump visible pulses with the pulse width of ∼30 ps in ultra-high vacuum. Broad non-resonant SF signals as a function of the infrared wavenumber increased soon after the pump light irradiation, and de...

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Veröffentlicht in:E-journal of surface science and nanotechnology 2010/02/27, Vol.8, pp.89-92
Hauptverfasser: Hien, Khuat Thi Thu, Miyauchi, Yoshihiro, Mizutani, Goro
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Sprache:eng
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Zusammenfassung:We have performed time-resolved sum frequency (SF) spectroscopy of a H-Si(111)1×1 surface excited by pump visible pulses with the pulse width of ∼30 ps in ultra-high vacuum. Broad non-resonant SF signals as a function of the infrared wavenumber increased soon after the pump light irradiation, and decreased in ∼1 ns. A remarkable change in the intensity and the shape of the peak at 2085 cm-1 attributed to the Si-H stretching vibration is observed as a function of the delay time. After the pump light irradiation, the symmetric peak in the SF spectra disappeared at ∼60 ps and recovered gradually with an asymmetric shape. [DOI: 10.1380/ejssnt.2010.89]
ISSN:1348-0391
1348-0391
DOI:10.1380/ejssnt.2010.89