標題: Ultrabroadband Midinfrared Pump-Probe Spectroscopy Using Chirped-Pulse Up-conversion in Gases
作者: Shirai, Hideto
Yeh, Tien-Tien
Nomura, Yutaka
Luo, Chih-Wei
Fuji, Takao
電子物理學系
Department of Electrophysics
公開日期: 28-May-2015
摘要: We demonstrate ultrabroadband and ultrafast midinfrared (MIR) pump-probe spectroscopy by employing the chirped-pulse up-conversion technique with four-wave difference-frequency generation in a gas. The full spectra of the MIR probe pulses, which spread from 200 to 5000 cm(-1), are recorded on a single-shot basis. We apply this MIR pump-probe spectroscopy to measure the ultrafast carrier dynamics of an intrinsic germanium crystal wafer. Ultrafast reflectivity change induced by the excitation of carriers is observed in the region from far to near infrared. The behavior of the reflectivity-change signals at each delay time is explained by the Drude model.
URI: http://dx.doi.org/10.1103/PhysRevApplied.3.051002
http://hdl.handle.net/11536/124801
ISSN: 2331-7019
DOI: 10.1103/PhysRevApplied.3.051002
期刊: PHYSICAL REVIEW APPLIED
Volume: 3
Issue: 5
起始頁: 0
結束頁: 0
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