Interaction of surface acoustic waves and ultraviolet light in ZnO films
2003 ◽
Vol 18
(3)
◽
pp. 545-548
◽
Keyword(s):
Uv Light
◽
The frequency response of a 37 MHz bulk LiNbO3 surface acoustic wave (SAW) filter with a 200-nm-thick ZnO overlayer exhibited a downshift in the frequency with ultraviolet (UV) light due to acoustoelectric interactions between the photo-generated carriers in the semiconducting ZnO and the surface acoustic waves. In contrast, a 36 MHz ZnO thin film SAW delay-line with insulating ZnO films exhibited an upshift in the frequency. The response was more pronounced at higher harmonics (130–315 MHz) and was attributed to changes in the elastic/dielectric properties in the upper surface layer of ZnO. A linear change in the frequency with UV intensity shows immense applicability for wireless ultraviolet sensor applications.
Keyword(s):
1995 ◽
Vol 78
(12)
◽
pp. 35-42
◽
Keyword(s):
2013 ◽
Vol 60
(6)
◽
pp. 1213-1218
◽
Keyword(s):
2011 ◽
Vol 364
◽
pp. 1-6
◽
Keyword(s):
2013 ◽
Vol 111
◽
pp. 105-109
◽