Proposal for an optical laser producing light at half the Josephson frequency

TL;DR

This paper proposes a superconducting device that generates visible light at half the Josephson frequency, with its optical phase locked to the superconducting phase difference, involving quantum dots in a resonant cavity.

Contribution

It introduces a novel superconducting laser device using quantum dots and a resonant cavity, with phase locking to the Josephson frequency, advancing quantum optoelectronic integration.

Findings

Device can produce laser light at half Josephson frequency

Optical phase is locked to superconducting phase difference

Analysis includes decoherence and spontaneous switching effects

Abstract

We describe a superconducting device capable of producing laser light in the visible range at half of the Josephson generation frequency with the optical phase of the light locked to the superconducting phase difference. It consists of two single-level quantum dots embedded into a p-n semiconducting heterostructure and surrounded by a cavity supporting a resonant optical mode. We study decoherence and spontaneous switching in the device.