Generation of terahertz radiation by a moving bunch of nonequilibrium electron-hole plasma
- A. F. Ioffe Physical Technical Institute, 194021 St. Petersburg (Russian Federation)
We report on properties of coherent radiation from nonequilibrium electron-hole (e-h) plasma bunch excited by an ultrashort laser pulse crossing a semiconducting slab subject to transverse bias voltage. Self-consisted calculations of nonequilibrium Boltzmann and Maxwell equations have established the fundamental role of uniformly moving bunch of e-h plasma in coherent generation of terahertz radiation. We have shown that predicted properties crucially depend on the physics of dissipation mechanisms, current configurations, and relative traveling velocities of e-h plasma bunch and terahertz radiation pulse. It has distinguished two major regimes of terahertz emission, single pulse emission, and firing twinned pulses at the moments of creation and extinction of moving bunch of e-h plasma related to the front and rare boundaries of semiconducting slab, respectively. The results of developed theory are applied to enhance the performance of photoconductive terahertz emitters.
- OSTI ID:
- 21192467
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 78, Issue 15; Other Information: DOI: 10.1103/PhysRevB.78.155325; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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