Fig.1 (IMAGE)

Osaka University

Fig.1

Caption

Method for coherent detection using a resonant tunneling diode (RTD). When the operating voltage of the RTD Vo is set within the negative differential conductance (NDC) region, the RTD oscillates, which enhances the detected power compared with that from conventional direct detection. Here, injection-locking helps to synchronize the RTD oscillation with the received signal. As a result, coherent detection of terahertz waves can be achieved with a single RTD.

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Osaka University

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