Work

Confocal photoluminescence mapping of diamond photonic crystal cavity modes for the silicon vacancy center

Year: 2026

Type: article

Abstract: Diamond photonic crystal cavities offer exceptional properties for interfacing color centers in diamond to integrated photonic circuits. Leveraging Purcell enhancement of the color centers' emission into the zero-phonon line, the development of high quality, low mode volume single-crystal diamond resonators remains one of the key challenges for building diamond quantum networks. In this paper, we present both a robust, versatile photonic crystal design as well as a scalable fabrication process realizing suspended nanobeam cavities. Measurements of confocal microscopy with broadband excitation yield quality factors of more than 5000. We further demonstrate a fast and facile characterization of our structures based on confocal photoluminescence imaging. This method not only provides a more detailed look at the higher order modes within diamond nanobeam resonators but also serves as a non-destructive diagnostic of the modes' susceptibility to fabrication imperfections, providing critical feedback for scalable, high-yield integrated quantum photonic device development.

Source: Optics Express

DOI: 10.1364/oe.585152