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

@article{Godschalk2010ProposalFA,
  title={Proposal for an optical laser producing light at half the Josephson frequency.},
  author={Frans Godschalk and Fabian Hassler and Yuli V. Nazarov},
  journal={Physical review letters},
  year={2010},
  volume={107 7},
  pages={
          073901
        }
}
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 in a p-n semiconducting heterostructure and surrounded by a cavity supporting a resonant optical mode. We study decoherence and spontaneous switching in the device. 
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