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We report the optical characterization of low temperature (LT)-GaAs and Semi Insulating (SI)-GaAs based dipole types Photoconductive (PC) antennas with gap of 5μm for the generation and detection of Terahertz (THz) signals. We have used tunable 140femto-seconds laser pulses at 80MHz repetition rate of different power and biasing voltage to evaluate the performance of our antennas as a THz generator...
Magnetic properties of alloyed Ohmic contacts of the type AuGe/Ni/Au on GaAs/AlGaAs multilayers with n + cap layer with different AuGe compositions and Ni-layer thicknesses are examined. Magnetization data indicate that the annealed structures are non-magnetic, at room temperature for commonly used anneal temperatures (∼400–430°C) and Ni-layer thicknesses (10–100nm). The transformation of...
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