Jonas B, Heinze D, Schöll E, Kallert P, Langer T, Krehs S, Widhalm A, Jöns K D, Reuter D, Schumacher S, Zrenner A
Paderborn University, Physics Department, Warburger Straße 100, 33098, Paderborn, Germany.
Paderborn University, Center for Optoelectronics and Photonics Paderborn (CeOPP), Warburger Straße 100, 33098, Paderborn, Germany.
Nat Commun. 2022 Mar 16;13(1):1387. doi: 10.1038/s41467-022-28993-3.
Tailored nanoscale quantum light sources, matching the specific needs of use cases, are crucial building blocks for photonic quantum technologies. Several different approaches to realize solid-state quantum emitters with high performance have been pursued and different concepts for energy tuning have been established. However, the properties of the emitted photons are always defined by the individual quantum emitter and can therefore not be controlled with full flexibility. Here we introduce an all-optical nonlinear method to tailor and control the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a semiconductor quantum three-level system. Based on this concept, we realize energy tuning and polarization control of the single photon emission with a control-laser field. Our results mark an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles.
量身定制的纳米级量子光源，能够满足特定用例的具体需求，是光子量子技术的关键组成部分。人们已经探索了几种不同的方法来实现高性能的固态量子发射器，并建立了不同的能量调谐概念。然而，发射光子的特性总是由单个量子发射器决定，因此无法完全灵活地控制。在此，我们介绍一种全光学非线性方法来定制和控制单光子发射。我们展示了一个由半导体量子三能级系统的激发态进行激光控制的下转换过程。基于这一概念，我们利用控制激光场实现了单光子发射的能量调谐和偏振控制。我们的结果标志着基于量子光学原理的光子量子系统实现量身定制单光子发射迈出了重要一步。
