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Mapping an on-chip terahertz antenna by a scanning near-field probe and a fixed field-effect transistor*
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Lü Li a),b), Sun Jian-Dong a)† , Lewis Roger A. c), Sun Yun-Fei d), Wu Dong-Min a),d), Cai Yong a), Qin Hua a)‡ |
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| (a) Tip-induced photocurrent as a function of the tip-antenna distance. The tip is pointed to the center of antenna block B, i.e., at ( x p, x y ) = ( 25 μm, 0 μm). The solid data points in an arbitrary unit are simulated mixing factors at x c = 1 μm. (b) Simulated mixing factors in the 2DEG channel with and without the near-field probe tip. In both simulations, the probe-antenna distance is set at z p = 0.5 μm. |
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