Bandgap radiation detector and method of fabrication

Details Bandgap radiation detector and method of fabrication Bandgap radiation detector and method of fabrication

H - Electricity

01

L

H01L 31/052 (2006.01) H01L 27/146 (2006.01) H01L 31/101 (2006.01) H01L 31/18 (2006.01)

Patent

CA 2036874

A radiation detector device for radiation of the infrared region and regions of shorter wavelengths comprises a dipole antenna mounted on a substrate and connected through blocking contacts to a bandgap detector element. The dipole antenna has a length which is approximately one half the wavelength of the incident infrared radiation. The bandgap detector element has linear dimensions which are each substantially smaller than the wavelength of the detected radiation. A group of detector devices are combined to form an array which can produce a pixel signal for an image. Unlike conventional infrared radiation detectors, the disclosed detector device is capable of producing a usable output signal without the need for cooling below ambient temperature. A further infrared radiation detector device has an array of detectors each of which comprises a pattern of parallel detector elements. Each detector produces a pixel signal for an image. The elements of the detector are photoconductive or photovoltaic bandgap materials, and the elements are spaced apart at a dimension which is equal to or less than the wavelength of the radiation to be received. Additional layered structures above and/or below the detector elements provide impedance matching between free space radiation and the radiation impedance of the detector elements, to increase the capture of radiation.

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