https://doi.org/10.15407/spqeo4.04.337
Semiconductor Physics, Quantum Electronics & Optoelectronics. 2001. V. 4, N 4. P. 337-342.
PACS: 75.50.D; 78.20
Features of optical properties of ferromagnetic semiconductors with dynamic laser-induced gratings
O.Yu. Semchuk 1, R.Z. Veskliarskii 2, and K.G. Kosharskii 2
1 Institute of Surface Chemistry National academy of Sciences of Ukraine,
31 Prospect Nauky
2 Department of Physics, Kyiv Taras Shevchenko National University, 17 General Naumov Str., 03164, Kyiv, Ukraine
64 Volodimirs’ka Str., Kyiv 03033, Ukraine
Abstract. Nonlinear optical phenomena in ferromagnetic semiconductor with dynamic grating created by coherent light beams are investigated. A high-frequency current and nonlinear absorption coefficient are calculated. It is shown that with increasing wave frequency, the nonlinear absorption coefficient grows and reaches the maximum at frequency w » 3·1012 s-1, and then smoothly decreases at higher frequencies. Therefore, the second term of the nonlinear absorption coefficient is modulated with coordinate. This proves that a dynamic grating emerges in ferromagnetic semiconductor.
Keywords: ferromagnetic semiconductor, dynamic grating, electron, magnon, absorption, high-frequency current, wave vector, coherent light beams, vector-potential.
Paper received 20.06.01; revised manuscript received 08.10.01; accepted for publication 12.12.01.
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