Widely tuning optical properties of nanoporous gold-titania core-shells |
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Authors: | Qian Lihua Shen Bo Qin Gaowu W Das Biswajit |
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Institution: | Nevada Nanotechnology Center, Howard R. Hughes College of Engineering, University of Nevada, Las Vegas, Nevada 89154-4026, USA. |
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Abstract: | Widely shifting localized surface plasmon resonance (LSPR) bands of nanoporous metals is essential for light manipulation within small volumes. In this work, nanoporous gold-titania core-shells fabricated by atomic layer deposition exhibit tunable LSPR of gold skeletons in comparison with nanoporous gold-alumina developed before. Extremely large red-shift of LSPR band in nanoporous gold-titania from 537 to 751 nm results from high refractive index of titania and its dielectric medium dependence of LSPR, and the well-controlled thickness of titania shell at the nanometer scale will benefit to integrate optical nanodevices with supreme performances. |
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