光子被限制在掺有量子点的3d微腔中

U. Woggon, M. Artemyev, H. Jaschinski, A. Pack, R. Wannemacher
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引用次数: 0

摘要

只提供摘要形式。我们提出了一个空心微球的概念,以实现半导体量子点的三维受限腔模式和量子化电子态之间的有效耦合。我们通过实验和理论证明,从放置在高质量球形微腔的薄表面壳内的半导体纳米晶体发射的光子有效地耦合到不同的,光谱上分离良好的高q低语走廊模式(WGM),而较高径向量子数n>1的腔模式被抑制。观察到的空腔模式在红橙色光谱范围内,并且在T=300 K时表现出高达4000的空腔精细度Q (Q在这里定义为谐振能量与空腔模式线宽之间的比值)。利用多重多极理论研究了电介质球中辐射偶极子与WGM模式的电动力耦合,并将其作为偶极子在球内位置和方向的函数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photons confined in 3D-microcavities doped with quantum dots
Summary form only given. We present the concept of a hollow microsphere to realize an efficient coupling between 3D-confined cavity modes and quantized electronic states of semiconductor quantum dots. We demonstrate both experimentally and theoretically that photons emitted from semiconductor nanocrystals placed inside a thin surface shell of a high-quality spherical microcavity efficiently couple to distinct, spectrally well separated high-Q whispering gallery modes (WGM) while cavity modes of higher radial quantum numbers n>1 are suppressed. The observed cavity modes are in the red-orange spectral range and exhibit a cavity finesse Q up to 4000 at T=300 K (Q is defined here as the ratio between resonance energy and linewidth of a cavity mode). The electrodynamic coupling of a radiative dipole to the WGM mode of a dielectric sphere has been investigated as a function of position and orientation of the dipole within the sphere by using the multiple multipole theory.
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