The role of optical excitation power on the emission spectra of a strongly coupled quantum dot-micropillar system.
The role of optical excitation power on the emission spectra of a strongly coupled quantum dot-micropillar system.
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光激发功率对强耦合量子点-微柱系统发射光谱的作用。
DOI：
10.1364/oe.17.012821
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发表时间：
2009
期刊：
影响因子：
3.8
通讯作者：
A. Forchel
中科院分区：
文献类型：
--
作者：
S. Münch;S. Reitzenstein;P. Franeck;A. Löffler;T. Heindel;S. Höfling;L. Worschech;A. Forchel
研究了激发功率变化下的强耦合量子点-微柱腔系统。当激发功率增加时，低激发下真空拉比分裂为 85 微电子伏特的发射的特征双峰光谱形状逐渐转变为单个宽发射峰。通过最近发表的形式主义对实验数据进行建模 [Laussy et al., Phys.莱特牧师。 101, 083601 (2008)]产生从强耦合到弱耦合的转变，这主要归因于激发功率驱动的激子-光子耦合常数的降低。
A strongly coupled quantum dot-micropillar cavity system is studied under variation of the excitation power. The characteristic double peak spectral shape of the emission with a vacuum Rabi splitting of 85 microeV at low excitation transforms gradually into a single broad emission peak when the excitation power is increased. Modelling the experimental data by a recently published formalism [Laussy et al., Phys. Rev. Lett. 101, 083601 (2008)] yields a transition from strong coupling towards weak coupling which is mainly attributed to an excitation power driven decrease of the exciton-photon coupling constant.