Cavity-enhanced photon indistinguishability at room temperature and telecom wavelengths

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 (2024): Cavity-enhanced photon indistinguishability at room temperature and telecom wavelengths. Nature Communications, 15: 3989. pp. 1-7. ISSN 2041-1723

Abstract

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.

• Dokumententyp: Artikel (LMU)
• Organisationseinheit (Fakultäten): 17 Physik
• DFG-Fachsystematik der Wissenschaftsbereiche: Naturwissenschaften
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - EXC-2111-390814868
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 491502892