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(a) Device structure of the 2DEG THz detector. (b) Schematic representation of the mechanism for the THz detection and modulation. (c) Sketch of the measurement system.
THz detected signal V sig versus magnetic field at f = 0.7, 1.4, 1.8, 2.6, and 3.1 THz.
R sd as a function of magnetic field at V g = 0, 40, and 80 V.
Vsig (upper panels) and Rsd (lower panels) versus magnetic field at Vg = 0, 40, 80, and 120 V. The left and right results were taken at f = 1.6 and 3.1 THz, respectively. The dashed lines indicate the resonance condition, and the arrows denote the minimum of the Rsd .
Time trace of Vsig as the square wave of Vg between 80 V and −80 V was applied.
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