Abstract-A hybrid analysis method for plasmonic enhanced terahertz photomixer sources

Saman Jafarlou, Mohammad Neshat, and Safieddin Safavi-Naeini »View Author Affiliations
http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-9-11115
A hybrid analysis of a continuous-wave terahertz photomixer source structure with plasmonic nano-grating electrodes is presented. Using the hybrid analysis, the enhancement of the optical power absorption due to the presence of the one-dimensional metallic nano-grating is investigated by defining an absorption enhancement factor. We show that the proposed absorption enhancement factor can be used as a design tool, whose maximization provides the optimum geometrical parameters of the nano-grating. Based on drift-diffusion model, the photocurrent enhancement due to the nano-grating electrodes is studied under three different bias configurations. Moreover, the dependence of the photocurrent on the physical parameters of the photomixer is analyzed.
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