We demonstrate a full-Stokes integrated polarimeter based on the circular photogalvainc effect in TaAs Weyl semimetal. Our work could enable a new class of compact and broadband polarization sensitive optoelectronic devices.
We report the design and fabrication of a PT-symmetric coupled-cavity AlGaAs MQW laser for THz beat frequency generation. The optical source consists of two PT-symmetric coupled-cavity resonators and an amplifying waveguide section, producing a beat frequency in the THz band. When the beat frequency is fed into a photomixing cell, a coherent THz signal is produced. The THz frequency can be tuned by varying the gain contrast between the two individual resonators.
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