A terahertz plasmon cavity detector

• Published in: Applied physics letters Vol. 97; no. 19; pp. 193507 - 193507-3
• Main Authors: Dyer, G. C., Vinh, N. Q., Allen, S. J., Aizin, G. R., Mikalopas, J., Reno, J. L., Shaner, E. A.
• Format: Journal Article
• Language: English
• Published: United States American Institute of Physics 08-11-2010
• Subjects: ALUMINIUM ARSENIDES; ALUMINIUM COMPOUNDS; ANTENNAS; ARSENIC COMPOUNDS; ARSENIDES; BOLOMETERS; CHARGED-PARTICLE TRANSPORT; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DETECTION; ELECTRICAL EQUIPMENT; ELECTRON MOBILITY; FREQUENCY RANGE; GALLIUM ARSENIDES; GALLIUM COMPOUNDS; GHZ RANGE; MATERIALS; MEASURING INSTRUMENTS; MOBILITY; NOISE; PARTICLE MOBILITY; PERIODICITY; PLASMA; PLASMONS; PNICTIDES; QUASI PARTICLES; RADIATION TRANSPORT; RESONANCE; SEMICONDUCTOR DEVICES; SEMICONDUCTOR MATERIALS; SENSITIVITY; SENSORS; TEMPERATURE RANGE; TEMPERATURE RANGE 0013-0065 K; TRANSISTORS; VARIATIONS
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.3513339

Sensitivity of a plasmonic detector is enhanced by integrating a broadband log-periodic antenna with a two-dimensional plasma cavity that is defined by source, drain, and multiple gates of a GaAs/AlGaAs high electron mobility transistor. Both narrow-band terahertz detection and a rich harmonic spectrum are evident. With a bolometric sensor in the channel, we report responsivity, on resonance at 235-240 GHz and at 20 K, of up to 7 kV/W and a noise equivalent power of
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