Multiband Switchable Terahertz Quarter-Wave Plates via Phase-Change Metasurfaces

Multiband Switchable Terahertz Quarter-Wave Plates via Phase-Change Metasurfaces
Title:
Multiband Switchable Terahertz Quarter-Wave Plates via Phase-Change Metasurfaces
Other Titles:
IEEE Photonics Journal
DOI:
10.1109/JPHOT.2016.2514717
Publication Date:
05 January 2016
Citation:
D. Wang et al., "Multiband Switchable Terahertz Quarter-Wave Plates via Phase-Change Metasurfaces," in IEEE Photonics Journal, vol. 8, no. 1, pp. 1-8, Feb. 2016. doi: 10.1109/JPHOT.2016.2514717
Abstract:
Metasurfaces open up a low-dimensional artificial approach to tailor electromagnetic (EM) waves with unprecedented functionalities. However, the ability to actively control and manipulate EM waves via metasurfaces still faces challenges that need to be overcome. Here, we experimentally demonstrated a multiband switchable terahertz quarter-wave plate via inserting a phase-change material, i.e., vanadium dioxide (VO2), into complementary electric split-ring resonators. Before the VO2 phase transition, this phase-change metasurface achieves linear-to-circular polarization conversion at 0.45 and 1.10 THz with an ellipticity of 0.998 and 0.971, respectively. After the VO2 phase transition, linear-to-circular polarization conversion is obtained at both 0.50 and 1.05 THz with an ellipticity of 0.999 and 0.999, respectively. This work reveals the feasibility of using phase-change metasurfaces for multiband tunable active terahertz polarization control, and such compact tunable devices can be designed for other frequency regimes as well.
License type:
PublisherCopyrights
Funding Info:
Description:
(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
ISSN:
1943-0655
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