Metallo-graphene nanocomposites and methods for using metallo-graphene nanocomposites for electromagnetic energy conversion

    公开(公告)号:US11456392B2

    公开(公告)日:2022-09-27

    申请号:US16617473

    申请日:2018-06-01

    Abstract: Nanocomposites in accordance with many embodiments of the invention can be capable of converting electromagnetic radiation to an electric signal, such as signals in the form of current or voltage. In some embodiments, metallic nanostructures are integrated with graphene material to form a metallo-graphene nanocomposite. Graphene is a material that has been explored for broadband and ultrafast photodetection applications because of its distinct optical and electronic characteristics. However, the low optical absorption and the short carrier lifetime of graphene can limit its use in many applications. Nanocomposites in accordance with various embodiments of the invention integrates metallic nanostructures, such as (but not limited to) plasmonic nanoantennas and metallic nanoparticles, with a graphene-based material to form metallo-graphene nanostructures that can offer high responsivity, ultrafast temporal responses, and broadband operation in a variety of optoelectronic applications.

    Opto-electronic device having junction field-effect transistor structure and image sensor including the opto-electronic device

    公开(公告)号:US11302740B2

    公开(公告)日:2022-04-12

    申请号:US16930574

    申请日:2020-07-16

    Abstract: Provided is an opto-electronic device having low dark noise and a high signal-to-noise ratio. The opto-electronic device may include: a first semiconductor layer doped to have a first conductivity type; a second semiconductor layer disposed on an upper surface of the first semiconductor layer and doped to have a second conductivity type electrically opposite to the first conductivity type; a transparent matrix layer disposed on an upper surface of the second semiconductor layer; a plurality of quantum dots arranged to be in contact with the transparent matrix layer; and a first electrode provided on a first side of the transparent matrix layer and a second electrode provided on a second side of the transparent matrix layer opposite to the first side, wherein the first electrode and the second electrode are electrically connected to the second semiconductor layer.

    NANODOME-GRAPHENE PLASMONIC SUBSTRATES

    公开(公告)号:US20210396916A1

    公开(公告)日:2021-12-23

    申请号:US17289386

    申请日:2019-10-30

    Inventor: Judy Z. Wu

    Abstract: Plasmonic substrates are provided which may be used in a variety of optoelectronic devices, e.g., biosensors and photodetectors. The plasmonic substrate may comprise a layer of graphene and a plurality of discrete, individual transition metal chalcogenide nanodomes distributed on a surface of the layer of graphene, each nanodome surrounded by bare graphene. Methods for making and using the plasmonic substrates are also provided.

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