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In this paper, we demonstrate that efficient phase modulation of THz wave can be addressed by active and enhanced resonant GaN high electron mobility transistor (HEMT) array metamaterials. We exploit the large phase shift of THz wave by using an enhanced resonant metamaterial structure which couples the traditional dipolar and inductance-capacitance resonances. By electrical controlling of the carrier...
Utilizing THz wave to transmit data for communication and imaging places high demands in phase and amplitude modulation. In this paper we combined a metamaterial array with HEMT structure to form a multiband electronic grid-controlled THz modulator. By controlling the carrier concentration of 2DEG, resonant mode conversions between four different complex resonances have been realized. This mode conversion...
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