Regensburg 2025 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 6: Materials and Devices for Quantum Technology I

HL 6.11: Talk

Monday, March 17, 2025, 17:45–18:00, H13

Design and optimization of bimodal cavities coupled to multi-level quantum systems — •Oscar Camacho Ibarra, Jan Gabriel Hartel, Atzin Ruiz Perez, Sonja Barkhofen, and Klaus Jöns — PhoQS Institute, CeOPP, and Department of Physics, Paderborn University, Paderborn, Germany

Photonic integrated cavities are essential building blocks for qubit-controlled switches, routers, and gates in quantum networks and quantum information processing. These devices rely on the integration of multi-level quantum systems coupled to multiple photonic modes inside a cavity. Thus, the present work introduces a systematic workflow for the design of bimodal cavities by employing one-dimensional crossed photonic crystal nanobeam cavities with non-zero cavity lengths. By optimizing three key parameters*the periodicity, a single feature size of the hole shape, and the central cavity length*we establish a robust methodology for designing crossed nanobeam cavities. This approach supports configurations with either matching or mismatched resonance frequencies, offering flexibility for diverse quantum applications. References [1]* Mikkel Heuck, Kurt Jacobs and Dirk R. Englund. Controlled-Phase Gate Using Dynamically Coupled Cavities and Optical Nonlinearities. Phys. Rev. A 109, 062620 (2024). [2]* Luiz O. R. Solak, Daniel Z. Rossatto, and Celso J. Villas-Boas, Universal quantum computation using atoms in cross-cavity systems. Phys. Rev. A 109, 062620 (2024).

Keywords: Bimodal cavities; QED; EIT; light-matter interaction