
Proceedings Paper
Helical auto-waves of electron-hole plasma in semiconductor induced by femtosecond pulse at presence of external electric fieldFormat | Member Price | Non-Member Price |
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Paper Abstract
We analyze laser-induced periodic structure developing in a semiconductor under the condition of both optical
bistability existence and external electric field presence. Optical bistability occurs because of nonlinear dependence of
semiconductor absorption coefficient on charged particles concentration. This dependence of the semiconductor
absorption takes place due to the Burstein-Moss effect. The electron mobility, diffusion of electrons, and laser-induced
electric field are taken into account for laser pulse propagation analyzing.
We found out that an external electric field could induce helical auto-waves of high absorption domain in semiconductor
if electron mobility influences on electron motion. The electron mobility causes electron motion from high absorption
domain to domains with lower concentration of free charged particles. As a consequence, the laser energy absorption
increases in these domains and new domains with high absorption appear.
External electric field together with electric field of free electrons and ionized donors governs the electron motion. As a
result, at certain conditions the additional positive inverse loop between electron motion and electric field caused by
redistribution of free charged particles appears. Together with an explosive absorption existence, which arises from
optical bistability, as a result of these two mechanisms presence the helical wave for free charged particles concentration
of electron-hole plasma in semiconductor develops.
Such type of wave may be seen also for a propagation of laser pulse with micro-, and nano-, and picoseconds duration
because an optical bistability based on increasing absorption takes place for effecting of these pulses as well.
For computer simulation of a problem under consideration a new finite-difference scheme is proposed. The main feature
of proposed methods consists in constructed iterative process.
Paper Details
Date Published: 5 September 2014
PDF: 13 pages
Proc. SPIE 9200, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII, 920004 (5 September 2014); doi: 10.1117/12.2059764
Published in SPIE Proceedings Vol. 9200:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII
Shizhuo Yin; Ruyan Guo, Editor(s)
PDF: 13 pages
Proc. SPIE 9200, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII, 920004 (5 September 2014); doi: 10.1117/12.2059764
Show Author Affiliations
Vyacheslav A. Trofimov, Lomonosov Moscow State Univ. (Russian Federation)
Vladimir A. Egorenkov, Lomonosov Moscow State Univ. (Russian Federation)
Vladimir A. Egorenkov, Lomonosov Moscow State Univ. (Russian Federation)
Mariya M. Loginovaa, Lomonosov Moscow State Univ. (Russian Federation)
Published in SPIE Proceedings Vol. 9200:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII
Shizhuo Yin; Ruyan Guo, Editor(s)
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