作者
Matthew J Dicken, Koray Aydin, Imogen M Pryce, Luke A Sweatlock, Elizabeth M Boyd, Sameer Walavalkar, James Ma, Harry A Atwater
发表日期
2009/9/28
期刊
Optics express
卷号
17
期号
20
页码范围
18330-18339
出版商
Optica Publishing Group
简介
Engineering metamaterials with tunable resonances from mid-infrared to near-infrared wavelengths could have far-reaching consequences for chip based optical devices, active filters, modulators, and sensors. Utilizing the metal-insulator phase transition in vanadium oxide (VO_2), we demonstrate frequency-tunable metamaterials in the near-IR range, from 1.5 - 5 microns. Arrays of Ag split ring resonators (SRRs) are patterned with e-beam lithography onto planar VO_2 and etched via reactive ion etching to yield Ag/VO_2 hybrid SRRs. FTIR reflection data and FDTD simulation results show the resonant peak position red shifts upon heating above the phase transition temperature. We also show that, by including coupling elements in the design of these hybrid Ag/VO_2 bi-layer structures, we can achieve resonant peak position tuning of up to 110 nm.
引用总数
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