Dresden 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 55: Quantum Dots and Wires: (Single) Photonics

HL 55.1: Vortrag

Freitag, 13. März 2026, 09:30–09:45, POT/0251

Fabrication of a III/V SiO2/SiN hybrid cavity incorporating a single Stark tunable (In,Ga)As quantum dot for high rate single photon generation — •Imad Limame, Kartik Gaur, Sarthak Tripathi, Setthanat Wijitpatima, Aris Koulas-Simos, Chirag Chandrakant Palekar, and Stephan Reitzenstein — Institute for Physics and astronomy, Technical University of Berlin, Berlin, Germany

The advancement of quantum photonic technologies, particularly secure communication based on semiconductor quantum dots (QDs), relies on the on-demand generation of high-quality quantum light. Emission of single photons with high brightness, purity, and indistinguishability is essential for scalable quantum networks. However, the photon emission rate of QDs is fundamentally limited by their nanosecond-scale radiative lifetime. To overcome this, QDs are integrated into photonic nanostructures that enhance light-matter interaction via the Purcell effect, accelerating emission dynamics. Yet, such approaches often require complex bonding and alignment, hindering scalability.

We demonstrate a scalable hybrid cavity platform integrating a Stark-tunable QD within a p-i-n diode into a resonator composed of an epitaxially grown III-V bottom mirror and a PECVD-deposited dielectric top DBR. Deterministic QD positioning using marker-based EBL ensures precise spatial and spectral alignment, improving photon extraction and reducing the radiative lifetime. This approach enables scalable, high-brightness, coherent quantum light sources, providing a solid foundation for next-generation integrated quantum photonics.

Keywords: Quantum dots; Telecom O-band; Purcell effect; Hybrid cavity; Scalable photonics