Earl Stuart K, James Timothy D, Davis Timothy J, McCallum Jeffrey C, Marvel Robert E, Haglund Richard F, Roberts Ann
Opt Express. 2013 Nov 4;21(22):27503-8. doi: 10.1364/oe.21.027503.
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.
光学天线是在可见频率下共振的亚波长金属结构，是天线技术中一个相对较新的分支，正应用于科学、技术和医学领域。动态调谐这些天线的共振将扩大其应用范围，并有可能提高等离子体设备的效率。在相变材料二氧化钒（VO₂）薄膜上制备了银纳米天线阵列，并通过将衬底温度升高到临界温度（约68°C）以上来调制这些阵列的共振波长。根据阵列的不同，观察到波长调制高达110nm。
