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- Title
The Effect of Illumination on the Characteristics of Acoustic Waves in a Piezoelectric Plate–Photoconducting Layer Structure.
- Authors
Borodina, I. A.; Kuznetsova, I. E.; Zaitsev, B. D.; Joshi, S. G.
- Abstract
The effect of light on the characteristics of an acoustic wave with the transverse-horizontal polarization (SH[sub 0]) propagating in a piezoelectric plate-photoconducting layer structure was theoretically studied. Applied to the case of an Y-X cut lithium niobate (or Y-X potassium niobate) plate coated by a cadmium sulfide layer with the thicknesses h[sub 1] and h[sub 2], respectively, the results of this analysis show that the photosensitivity of such structures strongly depends on the h[sub 1] and h[sub 2] values, reaching a maximum for h[sub 1] = 0.1λ and h[sub 2] = 0.01λ (where L is the acoustic wavelength). In the lithium niobate based structure with these parameters, the maximum value of the relative change in the wave velocity in response to the illumination intensity variation from 0.1 to 10[sup 6] 1x is 16% at a maximum damping rate of 5 dB/λ; the analogous values for potassium niobate are 47% and 17 dB/λ. These results show good prospects for the use of such a piezoelectric plate-photoconducting layer structures in photodetectors and optical radiation sensors.
- Subjects
SOUND waves; PIEZOELECTRIC materials; PHOTOCONDUCTIVITY
- Publication
Technical Physics Letters, 2002, Vol 28, Issue 1, p10
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/1.1448627