ANISOTROPIC CONDUCTING FILMS FOR ELECTROMAGNETIC RADIATION APPLICATIONS
First Claim
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1. An electromagnetic radiation source comprising:
- a substrate having a surface, the surface comprising a plurality of surface segments of a first material and a plurality of surface segments of a second material, wherein the surface segments of the first and second materials are arranged in a periodic pattern;
an electrically conducting film comprising an electrically conducting material disposed over the surface of the substrate; and
first and second electrical contacts in electrical communication with the electrically conducting film;
wherein the mobility of charge carriers in regions of the electrically conducting film that are disposed on surface segments of the first material differs from the mobility of the charge carriers in regions of the electrically conducting film that are disposed on surface segments of the second material, such that the charge carriers have a periodically varying mobility within the plane of the electrically conducting film;
and further wherein the electromagnetic radiation source is configured to generate electromagnetic radiation when the charge carriers pass through the electrically conducting film.
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Abstract
Electronic devices for the generation of electromagnetic radiation are provided. Also provided are methods for using the devices to generate electromagnetic radiation. The radiation sources include an anisotropic electrically conducting thin film that is characterized by a periodically varying charge carrier mobility in the plane of the film. The periodic variation in carrier mobility gives rise to a spatially varying electric field, which produces electromagnetic radiation as charged particles pass through the film.
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15 Claims
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1. An electromagnetic radiation source comprising:
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a substrate having a surface, the surface comprising a plurality of surface segments of a first material and a plurality of surface segments of a second material, wherein the surface segments of the first and second materials are arranged in a periodic pattern; an electrically conducting film comprising an electrically conducting material disposed over the surface of the substrate; and first and second electrical contacts in electrical communication with the electrically conducting film; wherein the mobility of charge carriers in regions of the electrically conducting film that are disposed on surface segments of the first material differs from the mobility of the charge carriers in regions of the electrically conducting film that are disposed on surface segments of the second material, such that the charge carriers have a periodically varying mobility within the plane of the electrically conducting film; and further wherein the electromagnetic radiation source is configured to generate electromagnetic radiation when the charge carriers pass through the electrically conducting film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14)
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12. An electromagnetic radiation source comprising:
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a substrate having a surface, the surface comprising a plurality of surface segments of a first material and a plurality of surface segments of a second material, wherein the surface segments of the first and second materials are arranged in a periodic striped pattern; an electrically conducting film comprising graphene; and first and second electrical contacts in electrical communication with the graphene; wherein the mobility of electrons in regions of the graphene that are disposed on surface segments of the first material differs from the mobility of electrons in regions of the graphene that are disposed on surface segments of the second material, such that the electrons have a periodically varying mobility within the plane of the graphene; and further wherein the periodicity of the periodic striped pattern is configured such that terahertz radiation is generated when electrons pass through the graphene. - View Dependent Claims (15)
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Specification