Korpel, Adrian Department of Electrical and Computer Engineering, University of Iowa, Iowa City, Iowa.
Last reviewed:August 2019
- Bragg diffraction
- Bragg cell
- Two-dimensional devices
- Related Primary Literature
- Additional Reading
The field of science and technology that is concerned with the diffraction of visible or infrared light (usually from a laser) by high-frequency sound in the frequency range of 50–2000 MHz. The term “acousto” is a historical misnomer; sound in this frequency range should properly be called ultrasonic. Such sound cannot be supported by air, but propagates as a mechanical wave disturbance in amorphous or crystalline solids, with a sound velocity ranging from 0.6 to 6 km/s (0.4 to 4 mi/s) and a wavelength from 3 to 100 μm. See also: Laser; Ultrasonics
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