Abstract
THz radiation emission from electrically excited AlGaN/GaN heterostructures with metal grating gate couplers was experimentally studied in the magnetic field. Special emphasis was paid to the technology and fabrication of the high quality AlGaN/GaN plasmonic structures with two-dimensional electron gas (2DEG) integrated with high active area metal surface grating. The THz emission peaks related to 2D plasmons were observed with and without a magnetic field. The positions of THz emission peaks and their dependence on the magnetic field are in agreement with the 2D plasmon resonances. The results pave the way toward new voltage-controlled sources of THz radiation.
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