Tomm Natasha, Antoniadis Nadia O, Janovitch Marcelo, Brunelli Matteo, Schott Rüdiger, Valentin Sascha R, Wieck Andreas D, Ludwig Arne, Potts Patrick P, Javadi Alisa, Warburton Richard J
Department of Physics, <a href="https://ror.org/02s6k3f65">University of Basel</a>, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
Lehrstuhl für Angewandte Festkörperphysik, <a href="https://ror.org/04tsk2644">Ruhr-Universität Bochum</a>, D-44780 Bochum, Germany.
Phys Rev Lett. 2024 Aug 23;133(8):083602. doi: 10.1103/PhysRevLett.133.083602.
A quantum emitter interacting with photons in a single optical-mode constitutes a one-dimensional atom. A coherent and efficiently coupled one-dimensional atom provides a large nonlinearity, enabling photonic quantum gates. Achieving a high coupling efficiency (β factor) and low dephasing is challenging. Here, we use a semiconductor quantum dot in an open microcavity as an implementation of a one-dimensional atom. With a weak laser input, we achieve an extinction of 99.2% in transmission and a concomitant bunching in the photon statistics of g^{(2)}(0)=587, showcasing the reflection of the single-photon component and the transmission of the multi-photon components of the coherent input. The tunable nature of the microcavity allows β to be adjusted and gives control over the photon statistics-from strong bunching to antibunching-and the phase of the transmitted photons. We obtain excellent agreement between experiment and theory by going beyond the single-mode Jaynes-Cummings model. Our results pave the way towards the creation of exotic photonic states and two-photon phase gates.
与单个光学模式中的光子相互作用的量子发射器构成一维原子。一个相干且高效耦合的一维原子提供了很大的非线性，从而实现光子量子门。实现高耦合效率（β因子）和低退相具有挑战性。在此，我们使用开放微腔中的半导体量子点来实现一维原子。通过弱激光输入，我们实现了99.2%的透射消光以及伴随的g^{(2)}(0)=587的光子统计聚束，展示了相干输入中单光子成分的反射和多光子成分的透射。微腔的可调性允许调整β，并能控制光子统计——从强聚束到反聚束——以及透射光子的相位。通过超越单模Jaynes-Cummings模型，我们在实验和理论之间取得了极佳的一致性。我们的结果为创建奇异光子态和双光子相位门铺平了道路。
