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公开(公告)号：US20200249451A1
公开(公告)日：2020-08-06
申请号：US16369218
申请日：2019-03-29
发明人： Salvatore Campione , Michael B. Sinclair , Igal Brener , D. Bruce Burckel , Aaron J. Pung , Michael D. Goldflam
摘要： Dielectric resonators provide a building block for the development of low-loss resonant metamaterials because they replace lossy ohmic currents of metallic resonators with low-loss displacement currents. The spectral locations of electric and magnetic dipole resonances of a dielectric resonator can be tuned by varying the resonator geometry so that desired scattering properties are achieved.
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公开(公告)号：US11017186B2
公开(公告)日：2021-05-25
申请号：US16369218
申请日：2019-03-29
发明人： Salvatore Campione , Michael B. Sinclair , Igal Brener , D. Bruce Burckel , Aaron J. Pung , Michael D. Goldflam
摘要： Dielectric resonators provide a building block for the development of low-loss resonant metamaterials because they replace lossy ohmic currents of metallic resonators with low-loss displacement currents. The spectral locations of electric and magnetic dipole resonances of a dielectric resonator can be tuned by varying the resonator geometry so that desired scattering properties are achieved.
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公开(公告)号：US11314145B1
公开(公告)日：2022-04-26
申请号：US17331314
申请日：2021-05-26
摘要： 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.
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公开(公告)号：US20170276848A1
公开(公告)日：2017-09-28
申请号：US15624117
申请日：2017-06-15
摘要： Tunable filters can use Fano metasurface designs having extremely narrow transmission bands. The Fano metasurface can comprise dielectric or semiconductor materials and can produce transmission bands with quality factors well in excess of 1000—at least a factor of 50 greater than typical metamaterial-based infrared resonances. Numerical simulations of these metasurfaces show that the spectral position of the passband can be changed by slightly changing the position of a small dielectric perturbation block placed within the near-field of the resonator by using simple electromechanical actuation architectures that allow for such motion. An array of independently tunable narrowband infrared filters can thereby be fabricated that only requires deep-subwavelength motions of perturbing objects in the resonator's near-field.
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公开(公告)号：US10908440B1
公开(公告)日：2021-02-02
申请号：US16510012
申请日：2019-07-12
发明人： Michael Wood , Salvatore Campione , Gordon Arthur Keeler , Kent M. Geib , Joshua Shank , Jon Ihlefeld , Darwin K. Serkland , Ting S. Luk , Isak C. Reines
摘要： A method of optical modulation in a non-resonant epsilon-near-zero (EMZ) plasmonic electro-optical modulator is provided. An optical carrier is injected into a waveguide optically coupled to a layer of transparent conductive material having an epsilon-near-zero (ENZ) wavelength. The transparent conductive material layer constitutes a portion of a capacitive structure that includes a gate dielectric layer. A time-varying bias voltage applied across the gate dielectric layer shifts the ENZ wavelength toward the carrier wavelength, and thereby impresses a phase modulation pattern on the carrier wave.
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公开(公告)号：US09799798B1
公开(公告)日：2017-10-24
申请号：US15379786
申请日：2016-12-15
CPC分类号： H01L33/06 , H01L33/0025 , H01L33/30
摘要： A novel thermal source comprising a semiconductor hyperbolic metamaterial provides control of the emission spectrum and the angular emission pattern. These properties arise because of epsilon-near-zero conditions in the semiconductor hyperbolic metamaterial. In particular, the thermal emission is dominated by the epsilon-near-zero effect in the doped quantum wells composing the semiconductor hyperbolic metamaterial. Furthermore, different properties are observed for s and p polarizations, following the characteristics of the strong anisotropy of hyperbolic metamaterials.
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公开(公告)号：US10908438B1
公开(公告)日：2021-02-02
申请号：US15909767
申请日：2018-03-01
发明人： Michael Wood , Salvatore Campione , Gordon Arthur Keeler , Kent M. Geib , Joshua Shank , Jon Ihlefeld , Darwin K. Serkland , Ting S. Luk
摘要： An electroabsorption modulator that operates based on electroabsorption of a surface plasmon polariton mode is improved by various structural changes and/or selection of different materials. For example, at least a portion of the waveguide may be made to be conductive, e.g., by doping. Also, layers that make up the modulator structure may be placed along sides of waveguides in addition to or instead of simply on the top thereof. High permittivity gate dielectric materials may be employed. Also, materials other than ITO may be employed as a transparent conductor. Such an improved plasmonic electroabsorption modulator can be fabricated using standard semiconductor processing techniques and may be integrated with standard photonic integrated circuits, including silicon photonics and compound semiconductor-based platforms. Advantageously, high-speed, low-voltage operation over a wide spectrum of wavelengths may be achieved.
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公开(公告)号：US10393933B2
公开(公告)日：2019-08-27
申请号：US15624117
申请日：2017-06-15
摘要： Tunable filters can use Fano metasurface designs having extremely narrow transmission bands. The Fano metasurface can comprise dielectric or semiconductor materials and can produce transmission bands with quality factors well in excess of 1000—at least a factor of 50 greater than typical metamaterial-based infrared resonances. Numerical simulations of these metasurfaces show that the spectral position of the passband can be changed by slightly changing the position of a small dielectric perturbation block placed within the near-field of the resonator by using simple electromechanical actuation architectures that allow for such motion. An array of independently tunable narrowband infrared filters can thereby be fabricated that only requires deep-subwavelength motions of perturbing objects in the resonator's near-field.
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公开(公告)号：US09846348B2
公开(公告)日：2017-12-19
申请号：US15040799
申请日：2016-02-10
CPC分类号： G02F1/353 , B82Y20/00 , B82Y30/00 , G02F1/355 , G02F1/3556 , G02F1/37 , G02F2001/354 , G02F2202/101 , G02F2202/16 , G02F2202/30 , G02F2202/36 , G02F2203/10
摘要： Efficient harmonic light generation can be achieved with ultrathin films by coupling an incident pump wave to an epsilon-near-zero (ENZ) mode of the thin film. As an example, efficient third harmonic generation from an indium tin oxide nanofilm (λ/42 thick) on a glass substrate for a pump wavelength of 1.4 μm was demonstrated. A conversion efficiency of 3.3×10−6 was achieved by exploiting the field enhancement properties of the ENZ mode with an enhancement factor of 200. This nanoscale frequency conversion method is applicable to other plasmonic materials and reststrahlen materials in proximity of the longitudinal optical phonon frequencies.
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