Single quantum-dot Purcell factor and β factor in a photonic crystal waveguide
Single quantum-dot Purcell factor and β factor in a photonic crystal waveguide
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DOI：
10.1103/physrevb.75.205437
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发表时间：
2007-05-01
影响因子：
3.7
通讯作者：
Hughes, S.
中科院分区：
文献类型：
--
作者：
Rao, V. S. C. Manga;Hughes, S.
提出了一种计算平面光子晶体波导中单量子点自发发射率增强（Purcell因子）和传输模式β因子的理论形式。随后预测了慢光模式的大Purcell因子和宽带（10thz）光谱范围内的巨大β因子（>.85）。发现光子态的局部密度在光子带边缘发散，但我们讨论了为什么这种发散在实际样品中总是会被展宽，最明显的是由于结构无序。强调了“片上”单光子源的应用。
A theoretical formalism to calculate the spontaneous emission rate enhancement (Purcell factor) and propagation mode beta factor from single quantum dots in a planar-photonic-crystal waveguide is presented. Large Purcell factors for slow light modes, and enormous beta factors (>0.85) over a broadband (10 THz) spectral range are subsequently predicted. The local density of photon states is found to diverge at the photonic band edge, but we discuss why this divergence will always be broadened in real samples, most notably due to structural disorder. Applications towards "on-chip" single photon sources are highlighted.