Non-linear kinetic model for oscillatory relaxation of the photovoltage effect on a Si(111)7 x 7 surface

作者：Ogawa M; Liu R Y; Lin C H; Yamamoto S; Yukawa R; Hobara R; Tang S J; Matsuda I^*

来源：Surface Science, 2014, 624: 70-75.

DOI：10.1016/j.susc.2014.01.014

• Surface photovoltage
• Carrier dynamics
• Time-resolved photoemission
• Synchrotron radiation
• Semiconductor surface

Oscillatory relaxation of surface photovoltage has been observed by time-resolved photoemission spectroscopy on a Si(111)7 x 7 surface with a temporal period of several tens of nanoseconds. The oscillation was reproduced by solving non-linear Master equations that describe surface recombination of electron-hole pairs associated with the formation of exciton-like states at the surface. Appearance of non-linear phenomena is naturally expected by the model when high density photo-excited carriers are generated by the high power laser pulse.

• 出版日期2014-6
• 单位清华大学