Quantum 2025 – scientific programme

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THU: Thursday Contributed Sessions

THU 13: Poster Session: Applications

THU 13.82: Poster

Thursday, September 11, 2025, 16:30–18:30, ZHG Foyer 1. OG

Design and optimization of bimodal cavities coupled to multi-level quantum systems — •Oscar Camacho Ibarra, Jan Gabriel Hartel, and Klaus D. Jöns — 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. Our 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 enabling quantum emitter integration. 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 with quality factors up to the order of 105. Our approach supports configurations with either matching or mismatched resonance frequencies, offering flexibility for diverse on-chip photonic quantum applications.

Keywords: Cavities; QED; Quantum dots