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    题名: Optical spectroscopic investigation of m-plane GaN thin films
    作者: Antaryami Mohanta;Tzeng, Yan-Zhi;Lee, Meng-En;Ling, Dah-Chin;Wang, Ying-Chieh;Lo, Ikai;Jang, Der-Jun
    贡献者: 淡江大學物理學系
    日期: 2014-09-01
    上传时间: 2015-05-11 01:31:17 (UTC+8)
    出版者: Washington, DC: Optical Society of America
    摘要: M-plane GaN thin films grown on γ-LiAlO2 substrate were investigated at different temperatures by photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectroscopy. The origin of two distinct emissions, P1 and P2 observed in the PL spectra were established by analyzing their PL and TRPL properties at different temperatures. The P1 emission is attributed to the excitons bound to the stacking faults (SFs). The P2 shows an anomalous “S-shaped” emission shift with increasing temperature (T), and the associated mechanism is discussed. The radiative life time ‘τr’ for P2 emission exhibits the T 3/2 dependence at higher temperatures and deviates at lower temperatures whereas the radiative life time ‘τr’ for P1 emission does not show the T 3/2 dependence with temperature. The polarization-dependent PL study reveals that P2 emission involves free holes in the transition at room temperature.
    關聯: Optical Materials Express 4(9), pp.1920-1931
    DOI: 10.1364/OME.4.001920
    显示于类别:[物理學系暨研究所] 期刊論文

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