Narrow-Band Terahertz Pulse Generation in Lithium Niobate Crystal Using Phase Mask

被引：0
|
作者：
Avetisyan, Y. H. [1 ]
Makaryan, A. H. [1 ]
机构：
[1] Yerevan State Univ, Yerevan, Armenia
来源：
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES | 2023年 / 58卷 / 04期
关键词：
terahertz; optical rectification; PPLN crystal; TEMPERATURE; RADIATION;
D O I：
10.1134/S1068337223040047
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Below, we theoretically study the generation of narrowband terahertz (THz) radiation by optical rectification in an artificial periodically poled lithium niobate (LN) crystal with a wide aperture. The latter is formed by placing a multi-slit phase mask in front of a conventional (single-domain) LN crystal. It is shown that the bandwidth of THz generation can be varied over a wide range by changing the linear size of the pump beam in the crystal. In addition, it is possible to tune up the generation frequency in the range of 0.4-0.8 THz by building a mask image in the crystal with different magnifications. According to estimates, the energy of narrowband THz pulses at a frequency of 0.5 THz in a stoichiometric LN crystal at a temperature of 100 K is about 265 mu J for a pump pulse energy of 220 mJ.
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页码：362 / 368
页数：7
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