Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 71: Cavity QED and QED II

Q 71.8: Talk

Friday, March 6, 2026, 12:45–13:00, P 4

Design of 1D Photonic Crystal Nanobeam Cavities for Quantum Dot Integration — •Oscar Camacho Ibarra, Sandesh Kallappa Mahajan, Jan Gabriel Hartel, Atzin Ruiz Perez, Sonja Barkhofen, and Klaus Jöns — hqpd lab, PhoQS institute, CeOPP, and Department of Physics,Paderborn University, Germany

Although the design and fabrication of nanobeam cavities have been extensively explored since the early 2000s, comparatively little attention has been given to tailoring these structures for the integration of epitaxial III*V semiconductor quantum dots (QDs). This gap largely stems from the realization, around 2018, that QDs experience significant linewidth broadening when placed too close to the etched sidewalls of nanophotonic structures. Such broadening is undesirable, as it degrades photon indistinguishability, which is a key requirement for single-photon sources. In this work, we present design strategies for 1D photonic crystal nanobeam cavities with minimal impact on the optical properties of the embedded QDs.

Keywords: Nanobeam cavities; Nanofabrication