Tunable optical antennas enabled by the phase transition in vanadium dioxide
Stuart K Earl, Timothy D James, Timothy J Davis, Jeffrey C McCallum, Robert E Marvel, Richard F Haglund, Ann Roberts
OPTICS EXPRESS | OPTICAL SOC AMER | Published : 2013
Optical antennas, subwavelength metallic structures resonating at visible frequencies, are a relatively new branch of antenna technology being applied in science, technology and medicine. Dynamically tuning the resonances of these antennas would increase their range of application and offer potential increases in plasmonic device efficiencies. Silver nanoantenna arrays were fabricated on a thin film of the phase change material vanadium dioxide (VO(2)) and the resonant wavelength of these arrays was modulated by increasing the temperature of the substrate above the critical temperature (approximately 68 °C). Depending on the array, wavelength modulation of up to 110 nm was observed.
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Awarded by Australian Research Council
Awarded by National Science Foundation
Awarded by Direct For Mathematical & Physical Scien
The authors would like to acknowledge the financial support of the Australian Research Council (project number DP110100221), the Defense Science Institute and a Vanderbilt University/University of Melbourne collaboration grant. This work was performed in part at the Melbourne Centre for Nanofabrication and at the Swinburne node of the Australian Fabrication Facility (ANFF). R. E. M. and R. F. H. acknowledge support of this work from the National Science Foundation (DMR-1207507) and from Vanderbilt University, office of the Vice Provost for Research.