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

Area of Science:

• Quantum optics
• Condensed matter physics
• Semiconductor devices

Background:

• Superconducting devices offer unique quantum phenomena.
• Generating visible light from quantum dots is challenging.
• Controlling optical phase with superconducting properties is an active research area.

Purpose of the Study:

• To demonstrate a novel superconducting device for visible laser light generation.
• To investigate the optical phase locking mechanism.
• To study decoherence and switching phenomena in the device.

Main Methods:

• Fabrication of a p-n semiconducting heterostructure with embedded quantum dots.
• Integration of the heterostructure within an optical cavity.
• Characterization of light emission and superconducting phase dynamics.

Main Results:

• Successful generation of visible laser light at half the Josephson frequency.
• Demonstration of optical phase locked to the superconducting phase difference.
• Analysis of decoherence and spontaneous switching behaviors.

Conclusions:

• The device presents a new platform for optoelectronic applications.
• Phase-locking offers precise control over light properties.
• Understanding decoherence is crucial for device optimization.