Generation of a two-photon state from a quantum dot in a microcavity
Generation of a two-photon state from a quantum dot in a microcavity
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DOI：
10.1088/1367-2630/13/11/113014
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发表时间：
2011-11-11
影响因子：
3.3
通讯作者：
Tejedor, C.
中科院分区：
文献类型：
--
作者：
del Valle, E.;Gonzalez-Tudela, A.;Tejedor, C.
我们提出并表征了一种双光子（2P）源，该源以高度偏振、单色和定向光束发射，通过嵌入线性偏振腔中的量子点来实现。在我们的方案中，腔频率被调整为双激子（两个具有相反自旋的激子）频率的一半，并且由于较大的双激子结合能而很大程度上与激子失谐。我们展示了如何将 Purcell 的发射增强几个数量级，进入可用实验系统的 2P 通道。
We propose and characterize a two-photon (2P) source that emits in a highly polarized, monochromatic and directional beam, realized by means of a quantum dot embedded in a linearly polarized cavity. In our scheme, the cavity frequency is tuned to half the frequency of the biexciton (two excitons with opposite spins) and largely detuned from the excitons thanks to the large biexciton binding energy. We show how the emission can be Purcell enhanced by several orders of magnitude into the 2P channel for available experimental systems.