UV SENSORS BASED ON ZINC OXIDE CRYSTALLINE NANOSTRUCTURES ON THE LITHIUM NIOBATE SUBSTRATE
Abstract
The original construction is developed of a sensor for ultraviolet (UV) radiation on the basis of mono-crystalline nanostructures of zinc oxide on lithium niobate substrates using a SAW resonator with an apodized pin transformer and a reverse multistrip coupler. As a layer sensitive to UV radiation the hydrothermally grown structures based on ZnO and ZnO: Al nanorods have been proposed. It is established that the both types possess high selectivity in the UV spectral region. It is shown that the frequency shift for a sensor modified with ZNO nanorods amounts to approximately 140 kHz, and for a sensor modified with ZNO nanorods with alloyed aluminum – approximately 110 kHz at an intensity of UV radiation of 46 mkW/ cm2. The manufactured UV radiation sensors based on SAW have demonstrated good technological reproducibility, high mechanical stability, and full recovery of frequency parameters of the resonator. The value is calculated, which characterizes the square of the coefficient of electromechanical connection of lithium niobate 128 of YX-cut modified by the structure of ZnO nanorods in the process of ultraviolet radiation treatment.
About the Authors
G. A. PASHKEVICH
НИИ прикладной электроники Национального технического университета Украины «Киевский политехнический институт»
Ukraine
Ukraine
P. I. ROPOT
Институт физики им. Б. И. Степанова НАН Беларуси, Минск
Belarus
Belarus
V. A. ULIANOVA
НИИ прикладной электроники Национального технического университета Украины «Киевский политехнический институт»
Ukraine
Ukraine
A. I. ZAZERIN
НИИ прикладной электроники Национального технического университета Украины «Киевский политехнический институт»
Ukraine
Ukraine
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