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Graphene Frequency Multipliers

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4 Author(s)
Han Wang ; Microsyst. Technol. Labs., Massachusetts Inst. of Technol., Cambridge, MA ; Daniel Nezich ; Jing Kong ; Tomas Palacios

In this letter, the ambipolar transport properties of graphene flakes have been used to fabricate full-wave signal rectifiers and frequency-doubling devices. By correctly biasing an ambipolar graphene field-effect transistor in common-source configuration, a sinusoidal voltage applied to the transistor gate is rectified at the drain electrode. Using this concept, frequency multiplication of a 10-kHz input signal has been experimentally demonstrated. The spectral purity of the 20-kHz output signal is excellent, with more than 90% of the radio-frequency power in the 20-kHz frequency. This high efficiency, combined with the high electron mobility of graphene, makes graphene-based frequency multipliers a very promising option for signal generation at ultrahigh frequencies.

Published in:

IEEE Electron Device Letters  (Volume:30 ,  Issue: 5 )