期刊
OPTICS EXPRESS
卷 17, 期 20, 页码 18330-18339出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.018330
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资金
- Nanoscience Institute at Caltech
- National Science Foundation Graduate Fellowship
- National Science Foundation [DMR 0606472]
- Army Research Office
- Center for Science and Engineering of Materials
- NSF MRSEC
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 (VO2), 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 VO2 and etched via reactive ion etching to yield Ag/VO2 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/VO2 bi-layer structures, we can achieve resonant peak position tuning of up to 110 nm. (C) 2009 Optical Society of America
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