Self-isolated nanoscale laser
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsJefferson Dixon, Mark Lawrence, David Russell Barton, III, Jennifer A. Dionne
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Abstract
Self-isolated lasers are provided by using a chiral metasurface in combination with a spin-selective gain medium and symmetry-breaking (i.e., not linearly polarized) optical pumping. In preferred embodiments the chiral metasurface is resonant, thereby proving an integrated optical resonator to support lasing. The chiral metasurface can be the spin-selective gain medium, or it can be formed on a surface of the spin-selective gain medium, or it can be distinct from the spin-selective gain medium.
Claims11
A self-isolated coherent light source comprising:
- a pump source configured to provide pump radiation having a not-linear state of polarization;
- a spin-selective gain medium configured to provide gain when excited by the pump radiation;
- an optical resonator configured to define a lasing mode when the spin-selective gain medium is excited by the pump radiation;
- and
- a chiral metasurface configured to provide less loss to the lasing mode than to a back-reflection of the lasing mode.
Dependencies are inferred from the claim text.