Title :
Detection and Homodyne Mixing of Terahertz Gas Laser Radiation by Submicron GaAs/AlGaAs FETs
Author :
Veksler, Dmitry ; Muravjov, Andrey ; Stillman, William ; Pala, Nezih ; Shur, Michael
Author_Institution :
Rensselaer Polytech. Inst., Troy
Abstract :
We demonstrated detection and homodyne mixing of laser modes of optically pumped terahertz gas laser at 2.52 THz by submicron AlGaAs/GaAs field-effect transistors (FETs). The mechanism of the detection of terahertz radiation is based on the phenomena of non-linear excitations of plasma waves in a channel with 2D electron gas. According to theoretical models, the response time associated with this detection mechanism can be as fast as picoseconds, which makes these plasma wave devices attractive for real time detection and heterodyne mixing applications in the terahertz frequency range.
Keywords :
field effect transistors; gas lasers; heterodyne detection; homodyne detection; optical pumping; 2D electron gas; GaAs-AlGaAs; field-effect transistors; frequency 2.52 THz; heterodyne mixing; homodyne mixing; laser modes; nonlinear excitations; optically pumped terahertz gas laser; plasma wave devices; plasma waves; real time detection; response time; submicron FET; terahertz gas laser radiation; Electron optics; FETs; Gallium arsenide; Gas lasers; Laser excitation; Laser modes; Laser theory; Plasma waves; Pump lasers; Radiation detectors;
Conference_Titel :
Sensors, 2007 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-1261-7
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2007.4388431
