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Overcoming the Rate-Directionality Trade-off: A Room-Temperature Ultrabright Quantum Light Source
ACS Nano ( IF 15.8 ) Pub Date : 2021-10-19 , DOI: 10.1021/acsnano.1c08591 Hamza Abudayyeh 1, 2 , Annika Mildner 3 , Dror Liran 1, 2 , Boaz Lubotzky 1, 2 , Lars Lüder 3 , Monika Fleischer 3 , Ronen Rapaport 1, 2, 4
ACS Nano ( IF 15.8 ) Pub Date : 2021-10-19 , DOI: 10.1021/acsnano.1c08591 Hamza Abudayyeh 1, 2 , Annika Mildner 3 , Dror Liran 1, 2 , Boaz Lubotzky 1, 2 , Lars Lüder 3 , Monika Fleischer 3 , Ronen Rapaport 1, 2, 4
Affiliation
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Deterministic GHz-rate single photon sources at room temperature would be essential components for various quantum applications. However, both the slow intrinsic decay rate and the omnidirectional emission of typical quantum emitters are two obstacles toward achieving such a goal which are hard to overcome simultaneously. Here, we solve this challenge by a hybrid approach using a complex monolithic photonic resonator constructed of a gold nanocone responsible for the rate enhancement, enclosed by a circular Bragg antenna for emission directionality. A repeatable process accurately binds quantum dots to the tip of the antenna-embedded nanocone. As a result, we achieve simultaneous 20-fold emission rate enhancement and record-high directionality leading to an increase in the observed brightness by a factor as large as 800 (130) into an NA = 0.22(0.5). We project that these miniaturized on-chip devices can reach photon rates approaching 1.4 × 108 photons/s and pure single photon rates of >107 photons/second after temporal purification processes, thus enabling ultrafast light–matter interfaces for quantum technologies at ambient conditions.
中文翻译：
克服速率-方向性权衡：室温超亮量子光源
室温下确定性的 GHz 速率单光子源将是各种量子应用的重要组成部分。然而，典型量子发射器的缓慢固有衰减率和全向发射是实现这一目标的两个难以同时克服的障碍。在这里，我们通过使用复杂的单片光子谐振器的混合方法解决了这一挑战，该谐振器由负责速率增强的金纳米锥构成，由圆形布拉格天线包围以实现发射方向性。一个可重复的过程将量子点准确地绑定到嵌入天线的纳米锥的尖端。结果，我们同时实现了 20 倍的发射率增强和创纪录的高方向性，导致观察到的亮度增加了 800 (130) 倍，NA = 0.22(0. 5）。我们预计这些小型化的片上设备可以达到接近 1.4 × 10 的光子率8光子/秒和>10 7光子/秒的纯单光子速率在时间纯化过程后，从而在环境条件下为量子技术实现超快光-物质界面。
更新日期：2021-11-23
中文翻译：
克服速率-方向性权衡：室温超亮量子光源
室温下确定性的 GHz 速率单光子源将是各种量子应用的重要组成部分。然而，典型量子发射器的缓慢固有衰减率和全向发射是实现这一目标的两个难以同时克服的障碍。在这里，我们通过使用复杂的单片光子谐振器的混合方法解决了这一挑战，该谐振器由负责速率增强的金纳米锥构成，由圆形布拉格天线包围以实现发射方向性。一个可重复的过程将量子点准确地绑定到嵌入天线的纳米锥的尖端。结果，我们同时实现了 20 倍的发射率增强和创纪录的高方向性，导致观察到的亮度增加了 800 (130) 倍，NA = 0.22(0. 5）。我们预计这些小型化的片上设备可以达到接近 1.4 × 10 的光子率8光子/秒和>10 7光子/秒的纯单光子速率在时间纯化过程后，从而在环境条件下为量子技术实现超快光-物质界面。
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