PHOTOMIXER FOR GENERATION OF COHERENT TERAHERTZ RADIATION AND RADIATION DETECTION

摘要

A photomixer for generating terahertz and microwave radiation or for use in a optical detector has an active volume including a semiconductor absorbing layer having a top and a bottom, an antireflective cap layer abutting the top of the absorbing layer, a free space disposed above the cap layer, a buried mirror abutting the bottom of the absorbing layer, and a plurality of interdigitated electrodes embedded in the absorbing layer at different positions along a z-axis, where each electrode has a lead for connection to other electrodes of the plurality. The electrodes are formed during epitaxial growth of the semiconductor absorbing layer.