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MON: Monday Contributed Sessions

MON 8: Quantum Sensing and Decoherence: Contributed Session to Symposium I

MON 8.5: Talk

Monday, September 8, 2025, 15:15–15:30, ZHG009

Nonlocal metasurface coupled to a single-photon emitter for on-chip applications — •Amitrajit Nag and Jaydeep Kumar Basu — Department of Physics, Indian Institute of Science, Bangalore, India-560012

Solid-state single-photon emitters (SPE) are indispensable in the emerging applications for qubits and photonic communications due to their higher quantum yield, spectral tunability, and scalability. All-dielectric guided mode resonant metasurfaces (GMR-MSR) are interesting photonic systems with low losses, waveguiding, and asymmetric Fano resonance features. The near-field coupling between an SPE and a GMR-MSR brings up interesting features like the resonance linewidth narrowing, directional emission, long-range photon transport, etc. In this work, we emphasize the field nonlocality property of a GMR-MSR, which controls and tunes the overall partial coherence of the coupled SPE-MSR system.

The in-plane component of this defined Green’s function of the SPE-MSR system quantifies this nonlocal field behavior. Our experimental results on SPEs integrated to GMR-MSR, capable of showing field nonlocality along with an appreciable antibunching property, makes the coupled system emerge as a new platform to efficiently generate directional, high spectral purity photons with precision control parameters, and the waveguiding gives the system an additional leap as a viable platform for on-chip integrated photonic applications.

Keywords: Single-photon emitter quantum well; Guided mode resonant metasurface; Nonlocal metasurface; Green's function; Fano resonant metasurface