LASER BEAM DEFOCUSING AT 1. 06 mu m BY CARRIER EXCITATION IN SILICON.

被引:0
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作者
Chen Jun [1 ]
Eichler, H.-J. [1 ]
机构
[1] Technische Univ Berlin, Berlin, West Ger, Technische Univ Berlin, Berlin, West Ger
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LASERS; SOLID STATE - SEMICONDUCTING SILICON - Charge Carriers;
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摘要
Laser beams from a 15 ns pulsed Nd:YAG laser are defocused after passing silicon crystals with 400 mu m thickness. The beam profile changes into a ring structure at incident laser energies up to 30 mJ and energy densities of 440 mJ/cm**2. The experimental deflection angles agree with calculations assuming refractive index changes due to electron-hole pairs produced by interband absorption.
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页码:121 / 124
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