101
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Xu HX, Sun S, Tang S, Ma S, He Q, Wang GM, Cai T, Li HP, Zhou L. Dynamical control on helicity of electromagnetic waves by tunable metasurfaces. Sci Rep 2016; 6:27503. [PMID: 27272350 PMCID: PMC4897613 DOI: 10.1038/srep27503] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 05/19/2016] [Indexed: 11/14/2022] Open
Abstract
Manipulating the polarization states of electromagnetic (EM) waves, a fundamental issue in optics, attracted intensive attention recently. However, most of the devices realized so far are either too bulky in size, and/or are passive with only specific functionalities. Here we combine theory and experiment to demonstrate that, a tunable metasurface incorporating diodes as active elements can dynamically control the reflection phase of EM waves, and thus exhibits unprecedented capabilities to manipulate the helicity of incident circular-polarized (CP) EM wave. By controlling the bias voltages imparted on the embedded diodes, we demonstrate that the device can work in two distinct states. Whereas in the “On” state, the metasurface functions as a helicity convertor and a helicity hybridizer within two separate frequency bands, it behaves as a helicity keeper within an ultra-wide frequency band in the “Off” state. Our findings pave the way to realize functionality-switchable devices related to phase control, such as frequency-tunable subwavelength cavities, anomalous reflectors and even holograms.
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Affiliation(s)
- He-Xiu Xu
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Physics Department, Fudan University, Shanghai 200433, China.,Air and Missile Defense College, Air force Engineering University, Xi'an, 710051, China
| | - Shulin Sun
- Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Green Photonics and Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
| | - Shiwei Tang
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Physics Department, Fudan University, Shanghai 200433, China.,Department of Physics, Faculty of Science, Ningbo University, Ningbo 315211, China
| | - Shaojie Ma
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Physics Department, Fudan University, Shanghai 200433, China
| | - Qiong He
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Physics Department, Fudan University, Shanghai 200433, China.,Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China
| | - Guang-Ming Wang
- Air and Missile Defense College, Air force Engineering University, Xi'an, 710051, China
| | - Tong Cai
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Physics Department, Fudan University, Shanghai 200433, China.,Air and Missile Defense College, Air force Engineering University, Xi'an, 710051, China
| | - Hai-Peng Li
- Air and Missile Defense College, Air force Engineering University, Xi'an, 710051, China
| | - Lei Zhou
- State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Physics Department, Fudan University, Shanghai 200433, China.,Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China
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102
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Huang C, Pan W, Ma X, Luo X. Multi-spectral Metasurface for Different Functional Control of Reflection Waves. Sci Rep 2016; 6:23291. [PMID: 27001206 PMCID: PMC4802343 DOI: 10.1038/srep23291] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 03/03/2016] [Indexed: 12/05/2022] Open
Abstract
Metasurface have recently generated much interest due to its strong manipulation of
electromagnetic wave and its easy fabrication compared to bulky metamaterial. Here,
we propose the design of a multi-spectral metasurface that can achieve beam
deflection and broadband diffusion simultaneously at two different frequency bands.
The metasurface is composed of two-layered metallic patterns backed by a metallic
ground plane. The top-layer metasurface utilizes the cross-line structures with two
different dimensions for producing 0 and π reflection phase response,
while the bottom-layer metasurface is realized by a topological morphing of the
I-shaped patterns for creating the gradient phase distribution. The whole
metasurface is demonstrated to independently control the reflected waves to realize
different functions at two bands when illuminated by a normal linear-polarized wave.
Both simulation and experimental results show that the beam deflection is achieved
at K-band with broadband diffusion at X-Ku band.
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Affiliation(s)
- Cheng Huang
- State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Science, P. O. Box 350, Chengdu 610209, China
| | - Wenbo Pan
- State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Science, P. O. Box 350, Chengdu 610209, China
| | - Xiaoliang Ma
- State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Science, P. O. Box 350, Chengdu 610209, China
| | - Xiangang Luo
- State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Science, P. O. Box 350, Chengdu 610209, China
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