Title :
Scattering of a standing surface wave on a temporal discontinuity of a waveguiding plasma medium
Author :
Bakunov, Michael I. ; Maslov, Alexey V. ; Zhukov, Sergey N.
Author_Institution :
Dept. of Radiophys., Univ. of Nizhny Novgorod, Russia
Abstract :
Summary form only given. The scattering of a standing surface wave on the boundary of a solid-state/gaseous plasma half-space due to instant growth of the plasma density in time is investigated. The mechanism of nonstationarity is rapid ionization of the waveguiding medium by a short laser pulse. We show that for a standing wave, in contrast to a traveling one, the scattering depends on the wave phase at the moment of ionization. By changing the moment of ionization, we can control the energy distribution between newly excited modes which include frequency upshifted standing surface wave, transient bulk radiation, and free streaming currents with a constant magnetic field in the semiconductor. The described phenomena open up new possibilities to probe the dynamics of surface excitations in semiconductors on the ultrashort time scale
Keywords :
electromagnetic wave scattering; ionisation; magnetic fields; plasma boundary layers; plasma density; plasma filled waveguides; plasma light propagation; waveguide discontinuities; constant magnetic field; energy distribution; free streaming currents; nonstationarity mechanism; plasma density; semiconductors; short laser pulse; solid-state/gaseous plasma half-space; standing surface wave scattering; surface excitations; temporal discontinuity; transient bulk radiation; wave phase; waveguiding medium ionization; waveguiding plasma medium; Gas lasers; Ionization; Laser excitation; Laser modes; Optical pulses; Plasma density; Plasma waves; Scattering; Solid state circuits; Surface waves;
Conference_Titel :
Applied Electromagnetism, 2000. Proceedings of the Second International Symposium of Trans Black Sea Region on
Conference_Location :
Xanthi
Print_ISBN :
0-7803-6428-7
DOI :
10.1109/AEM.2000.943242
