SAMOP 2023 – scientific programme

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QI: Fachverband Quanteninformation

QI 16: Concepts and Methods I

QI 16.8: Talk

Wednesday, March 8, 2023, 12:45–13:00, B302

Optical cavities based on optical Tamm states for application in quantum optics — •Manuel Goncalves — Ulm University - Inst. of Experimental Physics, Ulm, Germany

Single optical Tamm states arise on junctions of one-dimensional binary photonic crystals of different Zak phase (a topological invariant). By stacking multiple crystals of alternating Zak phase multiple photonic modes arise in the band gap. Differently from Fabry-Perot cavities, structures based on multiple optical Tamm states exhibit more modes than the number of coupled cavities. An analysis of the optical properties of the modes is presented.

These cavities can achieve large quality factors, have small mode volume, due to the short cavity length (half-wavelength), and are tunable by varying the angle of incidence of external illumination. Due to these properties, they can be used in quantum optics applications and substitute the much larger Fabry-Perot cavities.