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Title: Nanowire-based frequency-selective capacitive photodetector for resonant detection of infrared radiation at room temperature

Characteristics of a capacitive infrared photodetector that works at room temperature by registering a change in capacitance upon illumination are reported. If used in an ideal resonant inductor-resistor-capacitor circuit, it can exhibit zero dark current, zero standby power dissipation, infinite detectivity, and infinite light-to-dark contrast ratio. It is also made frequency-selective by employing semiconductor nanowires that selectively absorb photons of energies close to the nanowire's bandgap. Based on measured parameters, the normalized detectivity is estimated to be ∼3 × 10{sup 7} Jones for 1.6 μm IR wavelength at room temperature.
Authors:
 [1]
  1. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Department of Electrical and Computer Engineering, Virginia Commonwealth University, Richmond, Virginia 23284 (United States)
Publication Date:
OSTI Identifier:
22308711
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CAPACITORS; CURRENTS; DETECTION; ILLUMINANCE; INFRARED RADIATION; NANOWIRES; PHOTODETECTORS; PHOTONS; QUANTUM WIRES; SEMICONDUCTOR MATERIALS; TEMPERATURE RANGE 0273-0400 K; VISIBLE RADIATION; WAVELENGTHS