Abstract
We show that the spontaneous and piezoelectric polarization fields inside semiconductor wires embedded into a pyroelectric matrix induce thin mobile electron and/or hole stripes at the wire surfaces. These charged stripes of mobile carriers support longitudinal and transverse plasma waves with typical frequencies in the terahertz range. The longitudinal waves are conventional one-dimensional plasma waves with the frequency approximately proportional to the wave vector. The transverse waves are optical plasma waves with the frequency being nearly independent of the wave vector for the wave vectors approaching zero. The optical plasma branch is expected to strongly interact with the terahertz radiation.
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