Field-based Design of a Resonant Dielectric Antenna for Coherent Spin-Photon Interfaces

TL;DR

This paper introduces a field-based dielectric antenna design that efficiently interfaces diamond color centers with free-space Gaussian modes, achieving high Purcell factors and robustness to fabrication imperfections for quantum communication and computing applications.

Contribution

The paper presents a novel field-based dielectric antenna design that significantly improves spin-photon coupling efficiency and robustness compared to previous approaches.

Findings

Achieves Purcell factor exceeding 400.

Provides 93% mode overlap with Gaussian mode.

Robust to fabrication imperfections.

Abstract

We propose a field-based design for dielectric antennas to interface diamond color centers with a Gaussian propagating far field. This antenna design enables an efficient spin-photon interface with a Purcell factor exceeding 400 and a 93% mode overlap to a 0.4 numerical aperture far-field Gaussian mode. The antenna design is robust to fabrication imperfections, such as variations in the dimensions of the dielectric perturbations and the emitter dipole location. The field-based dielectric antenna design provides an efficient free-space interface to closely packed arrays of quantum memories for multiplexed quantum repeaters, arrayed quantum sensors, and modular quantum computers.