会议论文详细信息
33rd International Conference on the Physics of Semiconductors
Quantum Generation Dynamics of Coherent Phonons: Analysis of Transient Fano Resonance
Watanabe, Yohei^1 ; Hino, Ken-Ichi^2,3 ; Hase, Muneaki^4 ; Maeshima, Nobuya^2,3
Doctoral Program in Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki, Tsukuba
305-8573, Japan^1
Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba
305-8573, Japan^2
Center for Computational Sciences, University of Tsukuba, Tsukuba
305-8577, Japan^3
Division of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba
305-8573, Japan^4
关键词: Central frequency;    Coherent phonons;    Detunings;    Fano resonances;    Photoemission spectra;    Pump laser;    Time region;    Ultra-fast;   
Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/864/1/012079/pdf
DOI  :  10.1088/1742-6596/864/1/012079
来源: IOP
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【 摘 要 】

We study the transient Fano resonance of a semiconductor Si observed in the early time region of coherent phonon generation induced by an ultrafast pump laser. We particularly examine effects of the detuning on the transient Fano resonance, where the detuning is de ned by the difference between the central frequency of the pump laser and the band gap. It is clari ed that asymmetric pro les of transient induced photoemission spectra, implying the Fano resonance, strongly depend on the detuning. This is attributed to energetically adjacent bosonic states, whose energy levels are strongly in uenced by the detuning.

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