Title :
Double-layer acoustic antireflection coating for sapphire/water interface
Author :
Kushibiki, J. ; Chubachi, N.
Author_Institution :
Tohoku University, Department of Electrical Engineering, Faculty of Engineering, Sendai, Japan
Abstract :
Double-layer acoustic antireflection coating for the sapphire/water interface is experimentally and theoretically investigated in UHF range. By using the Au-SiO2 double layer with quarter wavelength thicknesses, the large transmission loss at the interface is almost completely reduced to be less than 0.1 dB at 600 MHz.
Keywords :
acoustic microscopes; antireflection coatings; lenses; sapphire; Au-SiO2 double layer; UHF; acoustic antireflection coating; acoustic discontinuity; acoustic microscopy; acoustic sapphire-lens system; sapphire/water interface; transmission loss;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19810043
