Nonlinear Surface Acoustic Wave Grating for Parametric Amplification
Nonlinear Surface Acoustic Wave Grating for Parametric Amplification
复制标题
用于参量放大的非线性表面声波光栅
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Y. Wang
中科院分区：
文献类型：
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作者：
Ting Lu;J. Schneider;Z. Yao;G. Carman;Y. Wang
在本文中，我们探讨参量放大的声波平台的目的是开发非线性器件，如放大器和混频器。与传统的电磁平台相比，声波平台的优点在于，前者获得了很大的利用短波长和低损耗的声波在射频，以实现具有小尺寸和高品质因数的设备。为了实现高效率的参量放大，采用非线性声表面波（SAW）光栅耦合不同频率的声波。通过理论分析和数值模拟，证明了利用钛酸锶钡（BST）材料的非线性介电常数与铌酸锂材料的机械刚度相耦合的非线性声表面波光栅的新结构。利用最佳的光栅长度和可调的BST薄膜介电常数实现了参量增益。
In this paper we explore parametric amplification on the acoustic wave platform for the purpose of developing nonlinear devices such as amplifiers and mixers. The advantage of acoustic wave platform over conventional electromagnetic platform is that the former obtains great leverage on short wavelength and low loss of acoustic wave at radio frequency to achieve devices with small footprints and high quality factor. To realize efficient parametric amplification a nonlinear surface acoustic wave (SAW) grating is employed to couple acoustic waves through different frequencies. Novel implementation of nonlinear SAW grating by coupling nonlinear permittivity of Barium Strontium Titanite (BST) to mechanical stiffness of Lithium Niobate has been proved by both theory and simulation. Parametric gain is realized with optimal grating length and tunable permittivity of commercial BST thin film.