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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) Map of the tip-induced photocurrent ( i p) by raster scanning the tip with a tip-detector distance of z p = 0.5 μm. The profile of the antennas and the gate is overlaid on the map. (b) A line scan along the dash–dotted line in panel (a), i.e., with y p = 0 μm. (c) A line scan along the dashed line in panel (a), i.e., with y p = −17.5 μm. (d) A line scan along the dash–dot–dotted line in panel (a), i.e., with x p = 25 μm. |
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