Light absorption and filtering properties of vertically oriented semiconductor nano wires
AssigneesPresident and Fellows of Harvard College, Zena Technologies, Inc.
InventorsKwanyong Seo, Munib Wober, Paul Steinvurzel, Ethan Schonbrun, Yaping Dan, Kenneth B. Crozier
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Abstract
A nanowire array is described herein. The nanowire array comprises a substrate and a plurality of nanowires extending essentially vertically from the substrate; wherein: each of the nanowires has uniform chemical along its entire length; a refractive index of the nanowires is at least two times of a refractive index of a cladding of the nanowires. This nanowire array is useful as a photodetector, a submicron color filter, a static color display or a dynamic color display.
Claims35
A nanowire array, comprising a substrate and a plurality of nanowires extending essentially perpendicularly from the substrate;
- wherein the nanowire array is operable as a color filter or the nanowires do not substantially couple;
- wherein each of the nanowires has an essentially uniform chemical composition from one end of the nanowire to an opposite end of the nanowire in a longitudinal direction of the nanowire;
- wherein a ratio of a radius of the nanowires to a pitch of the nanowires is at most 0.5.
A dynamic color display comprises a nanowire array comprising a substrate and a plurality of nanowires extending essentially perpendicularly from the substrate, the nanowire array being operable as a color filter;
- an array of independently addressable white light sources on a side of the substrate opposite the nanowires, wherein each white light source corresponds to and is aligned in the substrate plane with one of the nanowires.
A nanowire array, comprising a substrate and a plurality of nanowires extending essentially perpendicularly from the substrate;
- wherein the nanowire array is operable as a light filter or the nanowires do not substantially couple;
- wherein at least one nanowire among the plurality of nanowires has a dip in a reflectance spectrum of the at least one nanowire, wherein a light of a wavelength in the dip incident on the at least one nanowire is guided by the at least one nanowire to be transmitted through the substrate;
- wherein a ratio of a radius of the nanowires to a pitch of the nanowires is at most 0.5.
Dependencies are inferred from the claim text.