Efficient ultrathin all-dielectric nonlinear optical device
| DWPI Title: Apparatus for generating harmonic light from pump beam, comprises all-dielectric resonator bodies, multiple quantum well structure formed in each resonator body includes asymmetric coupled quantum wells having intersubband transition frequencies that couple to Mie resonances of resonator bodies |
| Abstract: An apparatus and method are provided for generating harmonic light from a pump beam that is impinged on a metasurface comprising a plurality of all-dielectric resonator bodies. A multiple quantum well structure formed in each resonator body includes asymmetric coupled quantum wells having intersubband transition frequencies that couple to Mie resonances of the resonator bodies. |
| Use: Apparatus for generating harmonic light from pump beam (claimed). |
| Advantage: The apparatus has low loss and high optical damage thresholds relative to plasmonic metasurfaces, and is able to enhance second harmonic (SH) generation efficiency. |
| Novelty: Apparatus with non-linear optical materials comprises a metasurface in which a set of elements is set on a substrate surface, where each of the elements is an all-dielectric resonator body conformed to resonate at a first resonant frequency. Each of the elements has at least some resonant response at a second resonant frequency that is a multiple of the first resonant frequency. Each of the elements includes at least one multiple quantum well (MQW) structure constituted by a sequence of layers that defines multiple quantum wells. Each MQW structure comprises at least one coupled quantum well (coupled QW) in which two or more dissimilar quantum wells are set sequentially. Each of the coupled QWs is dimensioned to have at least a first, a second, and a third electronic eigenstate having respective energy levels. The eigenstate energy levels are separated from each other by transition energies, each corresponding to a respective optical transition frequency. |
| Filed: 5/26/2021 |
| Application Number: US17331314A |
| Tech ID: SD 15419.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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