Remote excitation between quantum emitters mediated by an optical Fano resonance

• Published in: Optica Vol. 8; no. 12; p. 1605
• Main Authors: Yu, Yi, Delgoffe, Antoine Maxime, Miranda, Alessio, Lyasota, Alexey, Dwir, Benjamin, Rudra, Alok, Kapon, Eli
• Format: Journal Article
• Language: English
• Published: 20-12-2021
• ISSN: 2334-2536; 2334-2536
• DOI: 10.1364/OPTICA.442594

Remote coupling between quantum emitters is of great importance for constructing quantum networks. Conventionally, this can be achieved via photon exchange by incorporating the quantum emitters in a waveguide or a large cavity. However, such photonic structures suffer from low quality-factors or large mode volumes, limiting the efficiency of light–matter interaction. Here, we demonstrate remote coupling between two site-controlled semiconductor quantum dot emitters mediated by an optical Fano resonance induced by coupling cavity modes via a continuum waveguide state. Unlike ordinary coupled modes, the Fano mode offers both a spatially extended field and a high local density of optical states at the emitters, enhancing light–matter interaction. This coupling scheme allows the demonstration of mutual excitation between two quantum dots separated in space by > 17 wavelengths. Our approach holds promise for achieving long-distance interaction without compromising interaction efficiency, which is essential for scaling up on-chip integration of quantum networks based on solid-state quantum emitters.