Band-Selective Optical Polarizer Based on Gold-Nanowire Plasmonic Diffraction Gratings
- 14 August 2008
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 8 (9), 2653-2658
- https://doi.org/10.1021/nl0808435
Abstract
We report a plasmonic diffraction grating device as a new kind of optical polarizer. This simple device consists of periodically distributed gold nanowires on top of a transparent glass substrate and is based on the strong polarization dependence of the particle plasmon resonance of the gold nanowires. A high-efficiency secondary diffraction in the same device enhances the polarization extinction ratio significantly. Linearly polarized spectrum in the red with a bandwidth of 53 nm is selectively picked up from the nonpolarized white light, where a polarization extinction ratio higher than 100 at about 650 nm has been achieved. The idea of plasmonic diffraction grating is important for exploiting new detection and sensor techniques.Keywords
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