论文标题
部分可观测时空混沌系统的无模型预测
Temperature dependence of the single photon source efficiency based on QD-cQED
论文作者
论文摘要
我们研究了由量子点QD组成的光子电路，该光子电路在广泛的温度范围内到室温，该光子电路与光子腔耦合到光子腔。此处以基于腔量量子电动力学的purcell增强单光源的形式介绍了此类系统的关键组成部分。我们使用一组从INGAAS QD实验测量中提取的纯dephasing数据来计算有效的QD-cavity耦合强度，purcell因子和QD-cavity System中的单个光子效率，而没有QD-cavity System在没有和失调的情况下。在未解决的系统中，QD和谐振器之间的有效耦合强度随温度升高而降低，从而降低了效率。但是，当QD腔体系统的温度在purcell效应条件下升高时，QD腔内系统的QD-cavity系统会引起自发的发射率提高。结果，我们发现，当最大有效耦合强度和purcell因子与自发发射和纯dephasing速率有关时，效率的提高可以在一定条件下获得。此外，检查了泵送机制对QD系统效率的影响，并表明泵送过程可用于进一步提高效率。一旦考虑到温度，我们的结果对于高级量子光学应用可能是有利的。
We study a photonic circuit consisting of a quantum dot, QD, coupled to a photon cavity over a wide range of temperature up to room temperature. A key component of such a system is presented here in the form of a Purcell-enhanced single-photon source based on Cavity Quantum Electrodynamics, cQED. We use a real set of pure dephasing data extracted from experimental measurements of InGaAs QD to calculate the effective QD-cavity coupling strength, the Purcell factor, and the single photon efficiency emerged from the QD-cavity system in the cases without and with detuning. In the non-detuned system, the effective coupling strength between the QD and the resonator decreases with increasing temperature, results in a decrease in efficiency. However, when the temperature of the QD-cavity system increases under Purcell effect conditions, the detuned QD-cavity system induces spontaneous emission rate enhancement. As a result, we found that the increase in efficiency can be obtained under a certain condition, when the maximum effective coupling strength and the Purcell factor are related to the spontaneous emission and the pure dephasing rates. Additionally, the influences of the pumping mechanism on the efficiency of the QD-system were examined and showed that the pumping process can be used to further increase in efficiency. Our results can be advantageous for advanced quantum optics applications once temperature is taken into account.
