University of Central Florida Research Foundation Inc

Alireza Safaei

Debashis Chanda

Michael Leuenberger

Jonathan Lee

Sayan Chandra

Sushrut Modak

A subwavelength gold hole/disk array that when coupled with a ground plane induces extraordinary transmission through the hole/disk array and zero back reflection. The hole/disk array functions as a 'light funnel' in couling incident radiation into the cavity with about 100% efficiency over a narrow resonant bandwidth, which results in frequency-selective perfect (&#x2dc;100%) absorption of the incident radiation. Such an optical frequency-selective absorber enables flexible scaling of detector response to any wavelength range by pattern dimensional changes, enabling uncooled frequency selective detection and 'color' imaging in the infrared domain. Methods and applications are disclosed.

Optical frequency-selective absorber-based infrared detector, methods, and applications

Various methods and devices for ultrasensitive infrared photodetection, infrared imaging, and other optoelectronic applications using the plasmon assisted thermoelectric effect in graphene are described. Infrared detection by the photo-thermoelectric uses the generation of a temperature gradient (&#x394;T) for the efficient collection of the generated hot-carriers. An asymmetric plasmon-induced hot-carrier Seebeck photodetection scheme at room temperature exhibits a remarkable responsivity along with an ultrafast response in the technologically relevant 8-12 &#x3bc;m band. This is achieved by engineering the asymmetric electronic environment of the generated hot carriers on chemical vapor deposition (CVD) grown large area nanopatterned monolayer graphene, which leads to a record &#x394;T across the device terminals thereby enhancing the photo-thermoelectric voltage beyond the theoretical limit for graphene. The results provide a strategy for uncooled, tunable, multispectral infrared detection.

Plasmon-assisted photothermoelectric effect based detection of infrared radiation on asymmetrically patterned graphene

A method is for making an optical detector device. The method may include forming a reflector layer carried by a substrate, forming a first dielectric layer over the reflector layer, and forming a graphene layer over the first dielectric layer and having a perforated pattern therein.

Optical detector device with patterned graphene layer and related methods

An optical detector device may include a substrate, a reflector layer carried by the substrate, and a first dielectric layer over the reflector layer. The optical detector device may include a graphene layer over the first dielectric layer and having a perforated pattern.

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Alireza Safaei