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Q: Fachverband Quantenoptik und Photonik

Q 28: Poster – Quantum Optics

Q 28.16: Poster

Dienstag, 3. März 2026, 17:00–19:00, Philo 2. OG

Characterisation of perovskite quantum dots interfaced with a high-finesse cavity — •Svenja Müller¹, Amrutha Rajan², Gabriele Raino², Maksym Kovalenko², and David Hunger¹ — ¹Physikalisches Institut, Karlsruher Institut für Technologie, 76131 Karlsruhe, Germany — ²Department of Chemistry and Applied Biosciences, Institute of Inorganic Chemistry, ETH Zurich, 8093 Zurich, Switzerland.

Perovskite Quantum dots (PQDs) exhibit promising optical characteristics like a narrow emission line-width, a strong oscillator strength, and high quantum yield. Interfacing PQDs with an optical cavity gives the possibility controllably enhance light-matter interactions via the Purcell effect. As a first step, we integrate PQDs in a tunable, fiber-based microcavity to realize a highly coherent emitter of single photons. This may enable the generation of indistinguishable photons at room temperature, which can be useful in quantum network experiments. As a second step, we aim to reach the regime of strong coupling by integrating large PQDs with increased oscillator strength into a high-finesse cavity. In the strong coupling regime, the coupling of the emitter to the cavity is faster than the dephasing and cavity decay rates, offering insights into coherent light-matter interactions.

Keywords: Cavity; Perovskite; Quantum Dots; Nanocrystals; Light Matter interaction