Husel Lukas, Trapp Julian, Scherzer Johannes, Wu Xiaojian, Wang Peng, Fortner Jacob, Nutz Manuel, Hümmer Thomas, Polovnikov Borislav, Förg Michael, Hunger David, Wang YuHuang, Högele Alexander
Fakultät für Physik, Munich Quantum Center, and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Geschwister-Scholl-Platz 1, 80539, München, Germany.
Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA.
Nat Commun. 2024 May 11;15(1):3989. doi: 10.1038/s41467-024-48119-1.
Indistinguishable single photons in the telecom-bandwidth of optical fibers are indispensable for long-distance quantum communication. Solid-state single photon emitters have achieved excellent performance in key benchmarks, however, the demonstration of indistinguishability at room-temperature remains a major challenge. Here, we report room-temperature photon indistinguishability at telecom wavelengths from individual nanotube defects in a fiber-based microcavity operated in the regime of incoherent good cavity-coupling. The efficiency of the coupled system outperforms spectral or temporal filtering, and the photon indistinguishability is increased by more than two orders of magnitude compared to the free-space limit. Our results highlight a promising strategy to attain optimized non-classical light sources.
在光纤的电信带宽中，难以区分的单光子对于长距离量子通信至关重要。固态单光子发射器在关键基准测试中已取得优异性能，然而，在室温下实现光子不可区分性仍是一项重大挑战。在此，我们报告了在基于光纤的微腔中，由单个纳米管缺陷产生的电信波长下的室温光子不可区分性，该微腔工作在非相干良好腔耦合 regime 中。耦合系统的效率优于光谱或时间滤波，并且与自由空间极限相比，光子不可区分性提高了两个多数量级。我们的结果突出了一种实现优化非经典光源的有前景的策略。
