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公开(公告)号：US11788893B1
公开(公告)日：2023-10-17
申请号：US17718778
申请日：2022-04-12
CPC分类号： G01J5/0215 , G01J5/024 , G01J5/0837 , G01J5/0853 , G01J5/20
摘要： A nanoscale bolometer for infrared (IR) thermal imaging comprises a subwavelength antenna that provides a specific detectivity approaching a fundamental, thermodynamic limit. The uncooled nanobolometer achieves performance comparable to cooled, high-performance, semiconductor photodetectors, but with significantly reduced size, weight, power, and cost.
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公开(公告)号：US20180335651A1
公开(公告)日：2018-11-22
申请号：US15981561
申请日：2018-05-16
发明人： Paul G. Clem , Michael Goldflam , Ting S. Luk , Michael B. Sinclair , Thomas Edwin Beechem, III
CPC分类号： G02F1/009 , G02F1/0147 , G02F2203/11
摘要： Thermochromic low-emissivity films can comprise a vanadium dioxide thin film or a thin film of vanadium dioxide nanoparticles incorporated into a polymer matrix, and a layer comprising a transparent conductive oxide to modify solar heat gain, solar reflectivity and thermal resistance of windows. The thermochromic low-emissivity films transition from infrared (IR) reflective when warm, to IR transparent when cool. This dynamic reflectivity is passive by nature, and requires no electronics or power source to shift. In addition, this dynamic transition can occur at any design temperature, and when the nanoparticles are dispersed, they remain transparent in the visible spectrum during both phases.
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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：US20190196229A9
公开(公告)日：2019-06-27
申请号：US15981561
申请日：2018-05-16
发明人： Paul G. Clem , Michael Goldflam , Ting S. Luk , Michael B. Sinclair , Thomas Edwin Beechem, III
CPC分类号： G02F1/009 , G02F1/0147 , G02F2203/11
摘要： Thermochromic low-emissivity films can comprise a vanadium dioxide thin film or a thin film of vanadium dioxide nanoparticles incorporated into a polymer matrix, and a layer comprising a transparent conductive oxide to modify solar heat gain, solar reflectivity and thermal resistance of windows. The thermochromic low-emissivity films transition from infrared (IR) reflective when warm, to IR transparent when cool. This dynamic reflectivity is passive by nature, and requires no electronics or power source to shift. In addition, this dynamic transition can occur at any design temperature, and when the nanoparticles are dispersed, they remain transparent in the visible spectrum during both phases.
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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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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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