Surface acoustic wave reflections from a proton exchanged dispersive dot array
TL;DR: In this article, the detection of coherently reflected SAW from a dispersive array of proton exchanged dot rows, by utilizing a sensitive interferometric heterodyne laser probe, was reported.
Abstract: Proton‐exchanged (PE) regions in LiNbO3 create an invisible inhomogeneity that can be used as surface acoustic wave (SAW) reflectors similar to metallized overlays, implanted layers, or grooves. We report the detection of coherently reflected SAW, from a dispersive array of proton‐exchanged dot rows, by utilizing a sensitive interferometric heterodyne laser probe.
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TL;DR: In this paper, the scattering of surface acoustic waves (SAWs) by single dots, periodic and locally damped two-dimensional dot lattices, was examined with a scanning acoustic force microscope.
Abstract: We examine the scattering of surface acoustic waves (SAWs) by single dots, periodic and locally damped two-dimensional dot lattices. Employing the scanning acoustic force microscope, SAW fields are imaged with nanometer resolution. We study the influence of a roughly wavelength-sized single dot on SAW diffraction. In order to distinguish between forward- and backscattered components, we insonify the dot with the pump and probe beam under 0° and 90°. We furthermore analyze the SAW diffraction by a regular dot array. The wave field appears to be localized around the dots. Adding surface distortions, the regular SAW localization pattern brakes down in the vicinity of the distortion.
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07 Oct 2001
TL;DR: In this article, the influence of a wavelength-sized single dot on SAW diffraction was studied, using the scanning acoustic force microscope (SAFM) to measure surface acoustic wave (SAW) scattering from single dots, periodic and locally disturbed two-dimensional dot arrays.
Abstract: We present measurements of surface acoustic wave (SAW) scattering from single dots, periodic and locally disturbed two-dimensional dot arrays. By using the scanning acoustic force microscope (SAFM), SAW fields of arbitrary polarization can be imaged with submicron spatial resolution and sub-/spl Aring/ wave amplitude sensitivity. The influence of a wavelength-sized single dot on SAW diffraction is studied. Forward- and back-scattered wave components can be imaged by insonifying the dot with a pump and a probe beam under different angles. SAW diffraction images of a regular dot array reveal a wavefield that is localized around the dots. In case of a disturbed scattering array, the localized SAW pattern vanishes in the vicinity of the distortion.
Cites methods from "Surface acoustic wave reflections f..."
...The standard tool for local probing of SAW scattering [3] and localization [4] are laser-optical methods....
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01 Apr 1989
TL;DR: In this article, the authors present a survey of surface acoustic wave (SAW) devices and their applications in signal processing applications, as well as a discussion on the merits of SAW devices and applications.
Abstract: Acoustic waves at microwave frequencies have been widely used in signal processing applications. They are also emerging as a promising approach for communication and manipulation of quantum information. However, dynamic control of acoustic waves in a...Academic Press, 1989. 484 p. ISBN 978-0121573454. Surface Acoustic Wave Devices and Their Signal Processing Applications is a textbook that combines experiment and theory in assessing the signal processing applications of surface acoustic wave (SAW) devices. ...and Their Signal Processing Applications is a textbook that combines experiment and theory in assessing the signal processing applications of surface acoustic wave historical background on surface acoustic waves and a discussion on the merits of SAW devices as well as their applications.Surface-acoustic waves (SAWs) are sound waves that travel parallel to the surface of an elastic material, with their displacement amplitude [1] See, for example, the books: "Surface acoustic wave devices and their signal processing applications," C. Campbell, Academic press, London, 1989. Surface Acoustic Wave Devices and Their Signal Processing Applications Books by Colin Campbell Author uploaded on Nov 22, 2021. Surface Acoustic Wave Devices and Their Signal Processing Applications by Colin Campbell ePDF Onlines Book
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