Enhanced radiative recombination rate for electron-hole droplets in a silicon photonic crystal nanocavity
Enhanced radiative recombination rate for electron-hole droplets in a silicon photonic crystal nanocavity
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硅光子晶体纳米腔中电子空穴液滴的增强辐射复合率
DOI：
10.1103/physrevb.96.035303
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发表时间：
2017
影响因子：
3.7
通讯作者：
and Yoshihiko Kanemitsu
中科院分区：
文献类型：
--
作者：
Toshiyuki Ihara;Yasushi Takahashi;Susumu Noda;and Yoshihiko Kanemitsu
研究了干净硅光子晶体纳米腔在10 K下的光致发光光谱和动力学。当纳米腔模式的能量与电子空穴液滴的发射能量相等时，由纳米腔模式引起的尖锐发射峰强度最大。时间分辨PL光谱表明，在纳米腔模式下，EHD的PL寿命缩短至1.2 ns。对寿命的仔细分析表明，由于珀塞尔效应，EHD的辐射复合率提高了5倍以上。
We investigate photoluminescence (PL) spectra and dynamics of clean silicon photonic crystal nanocavities at 10 K. A sharp emission peak due to the nanocavity mode has the largest intensity when the energy of the nanocavity mode is equal to the emission energy of the electron-hole droplets (EHDs). Time-resolved PL spectroscopy indicates that the PL lifetime of the EHD is reduced to as short as 1.2 ns by the nanocavity mode. A careful analysis of the lifetimes indicates that the radiative recombination rate for EHD is enhanced by a factor of larger than 5 by the Purcell effect.