Related papers: Scalable on-chip integration of diamond color centers for cryogenic quantum photonics

Scalable on-chip integration of diamond color centers for cryogenic quantum photonics

URL: http://arxiv.org/abs/2604.06984v1
Date: Wed, 08 Apr 2026 12:00:36 GMT
Title: Scalable on-chip integration of diamond color centers for cryogenic quantum photonics
Abstract summary: Diamond color centers are promising because of their long spin coherence times and high photon emission rates.<n>We develop a chip-integrated diamond photonic crystal cavity embedding an ensemble of nitrogen-vacancy (NV) centers.<n>This result demonstrates successful integration of diamond color centers, a photonic crystal cavity, and an optical waveguide-fiber package.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Chip integration of quantum emitters is a crucial milestone for scalable quantum photonic information processing. Among optically active defect centers for quantum photonics, diamond color centers are promising because of their long spin coherence times and high photon emission rates. However, for a coherent-photon emission, they typically require a cryogenic environment to protect optical coherence from thermal phonons, which makes chip integration challenging. In this paper, we develop a chip-integrated diamond photonic crystal cavity embedding an ensemble of nitrogen-vacancy (NV) centers. We confirm cryogenic operation by observing Purcell enhancement of NV-center emission via an edge-coupled optical fiber. This result demonstrates successful integration of diamond color centers, a photonic crystal cavity, and an optical waveguide-fiber package, representing a key step toward scalable diamond-based quantum communication platforms.

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