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在适宜的弹性固定表面上传播的瑞利表面波模式速度约为光速的10~(-5)倍并与频率无关,以及10~4波长的衰减约为1.5分贝。这样,作为延迟线它就比较精密和损耗很小,并比电磁延迟线便宜得多。压电弹性固体容许通过表面电极来激励和检测表面波,制作工艺类似于单块半导体采用的工艺,以及通过与半导体表面层内载流子的互作用,可以实现放大。参量的互作用能用来实现两个信号的卷积。也证实了偏转和调制光束的可能性。今天,这种迅猛发展的表面波技术已能生产出延迟线、滤波器、脉冲压缩器和扩展器、脉冲程序发生器及译码器,将来可以实现小的、经济的、低功率结构的卷积、相关和控制光束器件。
The Rayleigh surface wave mode propagating on a suitable flexible fixed surface has a mode velocity of about 10-5 times the speed of light and is frequency independent and decays at about 10-4 wavelength by about 1.5 dB. In this way, as a delay line it is relatively precise and low loss, and much cheaper than the electromagnetic delay line. Piezo-elastic solids allow for surface excitation and detection of surface waves through a surface electrode, which is similar to the process used in a single semiconductor and can be amplified by interaction with carriers in the semiconductor surface layer. The interaction of the parameters can be used to achieve the convolution of the two signals. The possibility of deflecting and modulating the beam is also confirmed. Today, this rapidly evolving surface-wave technology has been able to produce delay lines, filters, pulse compressors and expanders, pulse program generators and decoders that will enable small, economical, low-power-volume volumes in the future Product, related and control beam devices.