Abstract
A method to enhance the photomixing efficiency by reducing the transit time of majority of carriers in photomixers and photodetectors to <1ps is proposed. Enhanced optical fields associated with surface plasmon polaritons coupled with velocity overshoot phenomenon results in net decrease of transit time of carriers. As an example, model calculations demonstrating >280× (or ∼2800 and 31.8μW at 1 and 5THz, respectively) improvement in terahertz power generation efficiency of a photomixer based on low temperature grown GaAs are presented.
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