Chu Xiao-Liu, Papon Camille, Bart Nikolai, Wieck Andreas D, Ludwig Arne, Midolo Leonardo, Rotenberg Nir, Lodahl Peter
Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.
Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany.
Phys Rev Lett. 2023 Jul 21;131(3):033606. doi: 10.1103/PhysRevLett.131.033606.
Efficient light-matter interaction at the single-photon level is of fundamental importance in emerging photonic quantum technology. A fundamental challenge is addressing multiple quantum emitters at once, as intrinsic inhomogeneities of solid-state platforms require individual tuning of each emitter. We present the realization of two semiconductor quantum dot emitters that are efficiently coupled to a photonic-crystal waveguide and individually controllable by applying a local electric Stark field. We present resonant transmission and fluorescence spectra in order to probe the coupling of the two emitters to the waveguide. We exploit the single-photon stream from one quantum dot to perform spectroscopy on the second quantum dot positioned 16 μm away in the waveguide. Furthermore, power-dependent resonant transmission measurements reveal signatures of coherent coupling between the emitters. Our work provides a scalable route to realizing multiemitter collective coupling, which has inherently been missing for solid-state deterministic photon emitters.
在新兴的光子量子技术中，单光子水平上高效的光与物质相互作用至关重要。一个基本挑战是同时处理多个量子发射器，因为固态平台的固有不均匀性要求对每个发射器进行单独调谐。我们展示了两个半导体量子点发射器的实现，它们与光子晶体波导有效耦合，并通过施加局部电场进行单独控制。我们展示了共振透射和荧光光谱，以探测两个发射器与波导的耦合。我们利用来自一个量子点的单光子流对位于波导中16μm远处的第二个量子点进行光谱分析。此外，功率相关的共振透射测量揭示了发射器之间相干耦合的特征。我们的工作为实现多发射器集体耦合提供了一条可扩展的途径，而固态确定性光子发射器一直缺乏这种耦合。
