A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot.

ABSTRACT: A quantum-light source that delivers photons with a high brightness and a high degree of entanglement is fundamental for the development of efficient entanglement-based quantum-key distribution systems. Among all possible candidates, epitaxial quantum dots are currently emerging as one of the brightest sources of highly entangled photons. However, the optimization of both brightness and entanglement currently requires different technologies that are difficult to combine in a scalable manner. In this work, we overcome this challenge by developing a novel device consisting of a quantum dot embedded in a circular Bragg resonator, in turn, integrated onto a micromachined piezoelectric actuator. The resonator engineers the light-matter interaction to empower extraction efficiencies up to 0.69(4

SUBMITTER: Rota MB 

PROVIDER: S-EPMC11269457 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature