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US 10,873,991 B2Granted
Photonic near infrared heater
AssigneeThe Regents of the University of California
InventorsRavi Shankar Prasher, Hao Wang, Justin Palmer Freedman
Life of this patent
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Abstract
A multilayer photonic stack comprising a lower plurality of alternating layers comprising at least A and B and an upper plurality of alternating layers comprising at least C and D, layer A comprises at least one of Al, Au, W, Ag, Ni, Ti, Pt, and Cr, layer B comprises at least one of Al2O3, AlN, MgO, SiO2, TiO2, Si3N4, MgF2, Ta2O5, SiC, Si, Ge, and Indium Tin Oxide (ITO), and layers C and D comprise at least one of Al2O3, AlN, MgO, SiO2, TiO2, Si3N4, MgF2, Ta2O5, SiC, Si, Ge, and Indium Tin Oxide (ITO).
Claims5
A multilayer photonic stack comprising:
- a lower portion of layers comprising a first layer of A and a first layer of B,
- the first layer of A comprising at least one of Al, Au, W, Ag, Ni, Ti, Pt, and Cr, and
- the first layer of B comprising at least one of Al2O3, AlN, MgO, SiO2, TiO2, Si3N4, MgF2, Ta2O5, SiC, Si, Ge, and indium tin oxide (ITO);
- and
- an upper portion of layers disposed on the lower portion of layers, the upper portion of layers comprising a plurality of sets of a layer of C and a layer of D disposed on the layer of C,
- the layer of C and the layer of D each comprising at least one of Al2O3, AlN, MgO, SiO2, TiO2, Si3N4, MgF2, Ta2O5, SiC, Si, Ge, and indium tin oxide (ITO), and the layer of C and the layer of D being different compositions;
- the multilayer photonic stack having an emissivity in the near infrared (NIR) range with the emissivity being at a maximum at a wavelength between 0.7 microns and 3 microns, and the multilayer photonic stack being disposed on a filament coil of a radiative heater.
4 more elements
Dependencies are inferred from the claim text.