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HL: Fachverband Halbleiterphysik

HL 7: Poster I

HL 7.47: Poster

Montag, 27. März 2023, 13:00–15:00, P2/EG

Towards solid-state quantum emitters strongly coupled to crossed nanobeam cavities — •Jan-Gabriel Hartel, Oscar Camacho Ibarra, and Klaus D. Jöns — hqpd lab, PhoQS Institute and Department of Physics, Paderborn University, Germany

The strong coupling regime of quantum electrodynamics, theoretically described via the Jaynes-Cummings model, offers insight into purely quantum mechanical effects in the interaction of a two-level system and a single mode light field. An extension of this model to the interaction of a two-level system with two resonant modes yields the possibility of free exchange of the excitation between the light modes as well as subsequent applications in quantum gates. While the fundamental case has been experimentally studied, the realization of this extension has proven to be elusive due to the technological challenges of fabricating a stable coupled cavity system.

In this work, we seek to approach this realization by exploring nanofabrication of on-chip crossed nanobeam cavity systems, realized via Bragg mirrors. We numerically explore heuristic extensions of existing design recipes for 1D nanobeam cavities, based on the creation of a localized defect mode. We emphasize the challenges of conserving high Q-factors at the specified resonance frequency while minimizing coupling between the crossed cavities, developing novel design ideas.