Title :
Tunable antenna coupled intersubband terahertz detector
Author :
Gautam, Nishit ; Kawamura, Jonathan ; Chahat, Nacer ; Karasik, Boris S. ; Focardi, Paolo ; Gulkis, Samuel ; Pfeiffer, Loren ; Sherwin, Mark
Author_Institution :
Inst. of Terahertz Sci. & Technol., UC-Santa Barbara, Santa Barbara, CA, USA
Abstract :
We report on the development of a tunable antenna coupled intersubband terahertz (TACIT) detector based on GaAs/AlGaAs two dimensional electron gas. A successful device design and micro-fabrication process have been developed which maintain the high mobility (1.1×106 cm2/V-s at 10K) of a 2DEG channel in the presence of a highly conducting backgate. Gate voltage-controlled device resistance and direct THz sensing has been observed. The goal is to operate as a nearly quantum noise limited heterodyne sensor suitable for passively-cooled space platforms.
Keywords :
antennas; heterodyne detection; quantum noise; terahertz wave detectors; two-dimensional electron gas; 2DEG channel; direct THz sensing; gate voltage controlled device resistance; highly conducting backgate; passively cooled space platforms; quantum noise limited heterodyne sensor; tunable antenna coupled intersubband terahertz detector; two dimensional electron gas; Antennas; Detectors; HEMTs; Logic gates; MODFETs; Metals; Resistance;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956457
