Researchers from Rice University and the University of California, Riverside (UCR) has demonstrated the first triple-mode graphene amplifier. By leveraging the ambipolarity of charge transport in graphene, the amplifier can be configured in the common-source, common-drain, or frequency multiplication mode of operation by changing the gate bias. This is the first demonstration of a single-transistor amplifier that can be tuned between different modes of operation using a single three-terminal transistor.

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