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

Journal Article · Mon Jul 14 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4887515· OSTI ID:22308711

Bandyopadhyay, Saumil ^[1]

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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)

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.

• OSTI ID: 22308711
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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