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arXiv 1506.05705cond-mat.mes-hallphysics.atom-phphysics.opticsquant-ph
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量子点的单光子超辐射

Single-photon superradiance from a quantum dot

P. Tighineanu, R. S. Daveau, T. B. Lehmann, H. E. Beere, D. A. Ritchie, P. Lodahl, S. Stobbe

摘要:

报道了半导体量子点中激子单光子超辐射的观测结果。量子点的限制强到足以模拟二能级原子,但又弱到足以确保超辐射。电子和空穴之间的静电相互作用,包括激子引起的非谐光谱,我们利用准备超辐射量子态确定性与激光脉冲。与传统量子点相比,我们观察到振荡器强度的五倍增强。增强是有限的,我们的低温恒温器的基础温度,并可能导致振荡器的强度超过1000从一个单一的量子发射器在光频率。

英文摘要:

We report on the observation of single-photon superradiance from an exciton in a semiconductor quantum dot. The confinement by the quantum dot is strong enough for it to mimic a two-level atom, yet sufficiently weak to ensure superradiance. The electrostatic interaction between the electron and the hole comprising the exciton gives rise to an anharmonic spectrum, which we exploit to prepare the superradiant quantum state deterministically with a laser pulse. We observe a five-fold enhancement of the oscillator strength compared to conventional quantum dots. The enhancement is limited by the base temperature of our cryostat and may lead to oscillator strengths above 1000 from a single quantum emitter at optical frequencies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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