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Carrier (electron) density, mobility, and resistivity of the LTG as functions of the annealing temperature. The open and filled symbols correspond to the growth at 180 and , respectively, and the circles, squares, and diamonds show the values of , 0.47, and 0.40, respectively. The lines are guides for the eyes.
Conductance of the PC antennas made on the grown at and annealed at as functions of the excitation power. The circles, squares, and diamonds correspond to , 0.47, and 0.40, respectively. Filled and open symbols are the values under 1.56 and excitations, respectively.
Time-domain traces and their amplitude spectra of the terahertz signals detected by the antennas made on the grown at 180 and . The annealing temperature was . The time-domain traces were vertically shifted for clarity.
Amplitude spectra of the terahertz signals detected by the antennas made on the LTG layers: (a) , (b) , and (c) , all grown at and annealed at . The dotted and solid curves correspond to the 3 and excitation, respectively.
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