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4 November 2004 Frequency-selective sub-mm-W detector based on semiconductor superlattice with a built-in resonator
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We propose a design of the frequency-selective sub-mm-W detector, which must operate at room temperature. The idea is based on a standing wave enhancement of the detector responsivity. The detector contains a lateral semiconductor superlattice with electrons performing Bloch oscillations as an active medium, a broadband bow-tie terahertz (THz) antenna, a built-in resonator and an external dc circuit. As compared with well-known THz-photon detector based on one-dimensional layered superlattice the switch to the lateral superlattice leads to a necessary change in technology of antenna attachment to the superlattice and allows the additional growth of a resonator. The estimation calculations of the current responsivity of the proposed detector fulfilled by means of an equivalent transmission line model have proved that the detector responsivity can be enhanced in several hundred times near a resonance frequency due to the matching between the incident radiation and the superlattice provided by built-in resonator. The expected rise time of the proposed detector is in order of 10-11s.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander S. Raspopin and Hong-Liang Cui "Frequency-selective sub-mm-W detector based on semiconductor superlattice with a built-in resonator", Proc. SPIE 5543, Infrared Spaceborne Remote Sensing XII, (4 November 2004);

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