SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 49: Quantum dots: Devices
HL 49.3: Talk
Friday, March 31, 2023, 10:00–10:15, POT 151
Investigation of optical properties of open-fiber cavities embedding semiconductor quantum dots emitting in the telcom O-band — •Nam Tran1, Julian Maisch1, Jonas Grammel2, Julia Wecker1, Thomas Herzog1, Robert Sittig1, Ponraj Vijayan1, Michael Jetter1, Simone L. Portalupi1, David Hunger2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen , Center for Integrated Quantum Science and Technology (IQST) and SCoPE , University of Stuttgart, Stuttgart, Germany — 2Physikalisches Institut , Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
Single photon sources operating at telecom wavelength play a central role in quantum information, in particular when long-distance implementations are targeted. Highly promising candidates are semiconductor quantum dots (QD). Cavity quantum electrodynamics is often used to tailor the emission properties and, in case of photon sources, enhance their performances. However, limiting factors like spatial and spectral mismatch can be detrimental to the cavity-emitter interaction. Using tunable fiber cavities can overcome these limitations. Additionally, since the fiber coupling is intrinsically given in these cavities the integration into the already existing fiber network is facilitated. Here, we made a thorough investigation of the optical properties of open fiber cavities embedding semiconductor QDs emitting in the telecom O-band. Moreover, deterministic positioning of individual QDs enables the comparison of the optical properties within and outside the cavity.