Second harmonic reflectors on 128°LiNbO3

被引：0
|
作者：
Lehtonen, S [1 ]
Plessky, VP [1 ]
Koskela, J [1 ]
Salomaa, MM [1 ]
机构：
[1] Helsinki Univ Technol, Phys Mat Lab, FIN-02015 Espoo, Finland
来源：
2001 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2 | 2001年
关键词：
D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
In this work, we study theoretically the operation of surface-acoustic wave (SAW) reflectors at the second harmonic frequency on the 128degrees LiNbO3 substrate for various electrode thicknesses and metallisation ratios. Rigorous FEM/BEM simulations utilizing a tailored test structure and time gating indicate that for certain geometries, the reflectivity of the 2(nd) harmonic reflectors can be very high. Furthermore, our simulations suggest that inside the stopband the total losses for the second harmonic are of the same order as those for fundamental harmonic operation.
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页码：139 / 143
页数：5
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