Title :
Surface acoustic wave response to optical absorption by graphene composite film
Author :
Chivukula, V.S. ; Ciplys, D. ; Jin Ho Kim ; Rimeika, R. ; Xu, Jimmy M. ; Shur, Michael S.
Author_Institution :
Dept. of Electr. Eng., Rensselaer Polytech. Inst., Troy, NY, USA
fDate :
2/1/2012 12:00:00 AM
Abstract :
Propagation of surface acoustic waves in YZ LiNbO3 overlaid with graphene flakes has been investigated and its optical response to illumination by 633-nm light from a He-Ne laser was studied. The heating of the sample surface caused by optical absorption by the graphene led to a downshift in the transmitted SAW phase caused by the wave velocity´s dependence on temperature. The proposed simple model based on optothermal SAW phase modulation was found to be in good agreement with the experimental results.
Keywords :
composite materials; graphene; lithium compounds; phase modulation; surface acoustic waves; thin films; visible spectra; C; LiNbO3; SAW phase modulation; graphene composite film; graphene flakes; optical absorption; surface acoustic wave propagation; wave velocity; Heating; Measurement by laser beam; Optical films; Optical surface waves; Optical variables control; Surface acoustic waves;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2012.2186
