Frequency-Tunable Mid-Infrared Cross Polarization Converters Based on Graphene Metasurface

Chen, Ming; Sun, Wei; Cai, Jianjin; Chang, Linzi; Xu, Xiaofei

doi:10.1007/s11468-016-0316-0

Cited by 35 publications

(9 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the localization increases with frequency, the lattice size is smaller in higher frequency designs. Due to such a small feature size, all the proposed designs are very robust to the variation of the incidence angle up to 40° or more [88,90,93,94]. This is the merit of the graphene HWP compared to the metallic counterpart besides electrical tunability.…”

Section: Polarization Modulation In Graphene Metasurfacesmentioning

confidence: 99%

Recent Progress on Graphene-Functionalized Metasurfaces for Tunable Phase and Polarization Control

2019

View full text Add to dashboard Cite

The combination of graphene and a metasurface holds great promise for dynamic manipulation of the electromagnetic wave from low terahertz to mid-infrared. The optical response of graphene is significantly enhanced by the highly-localized fields in the meta-atoms, and the characteristics of meta-atoms can in turn be modulated in a large dynamic range through electrical doping of graphene. Graphene metasurfaces are initially focused on intensity modulation as modulators and tunable absorbers. In this paper, we review the recent progress of graphene metasurfaces for active control of the phase and the polarization. The related applications involve, but are not limited to lenses with tunable intensity or focal length, dynamic beam scanning, wave plates with tunable frequency, switchable polarizers, and real-time generation of an arbitrary polarization state, all by tuning the gate voltage of graphene. The review is concluded with a discussion of the existing challenges and the personal perspective of future directions.

show abstract

Section: Polarization Modulation In Graphene Metasurfacesmentioning

confidence: 99%

Recent Progress on Graphene-Functionalized Metasurfaces for Tunable Phase and Polarization Control

2019

View full text Add to dashboard Cite

show abstract

“…It can be considered that the extended bandwidth of the cross-polarized reflection is primarily caused by the overlying magnetic resonance and electrical resonance. This also implies that the proposed metasurface is able to work over a broadband through reasonable optimization of its geometrical parameters as a result of the multiple resonance characteristics [48][49][50]. Interference theory can be used to further determine the reasons for the high polarization conversion efficiency.…”

Section: Design Simulation and Theoretical Analysismentioning

confidence: 99%

High-Efficiency Dual-Frequency Reflective Linear Polarization Converter Based on Metasurface for Microwave Bands

Sun

Han

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

A dual-broadband and high-efficiency reflective linear polarization converter based on an anisotropic metasurface is presented. The device consists of two symmetrical, double-slotted metallic split-rings and one criss-cross structure, a dielectric layer, and a completely reflective metallic ground. The converter exhibits four resonances and can near-perfectly convert x- or y-polarized incident waves into cross-polarized waves in the frequency ranges of 9.38–13.36 GHz and 14.84–20.36 GHz. The polarization conversion ratios (PCRs) of the two bands are 98.21% and 99.32%, respectively. The energy conversion ratio (ECR) for energy loss measurement is almost 100% in these frequency bands. The polarization conversion principle is studied. The bandwidths and PCRs of the two bands are determined by varying the dielectric layer thickness. The simulation results are consistent with experimental observations. The designed dual-broadband and high-efficiency metasurface has great potential in the application of electromagnetic polarization control.

show abstract

“…This differs from the function of a trivial mirror, which converts the incident CP light to its cross-polarization state after reflection. A commonly used parameter for the metasurface devices working at transmission applications is the polarization conversion ratio (PCR), which characterizes the ability to convert the incident CP light to its cross-polarization state [35], [51]. Here we define polarization maintaining ratio (PMR) to evaluate and quantify the ability to convert the incident CP light to its co-polarization state.…”

Section: Unit Cells Of the Metasurfacementioning

confidence: 99%

“…Therefore, graphene remains an ideal platform in realizing frequency tunable or electrically reconfigurable terahertz devices [28], [33], [34]. Recently, graphene-based metasurfaces are proposed to achieve tunable polarization conversions or beam splitting [35]- [40], but most of them are designed for the linear polarization. Moreover, they do not explicitly discuss the overall operation efficiency of their devices.…”

Section: Introductionmentioning

confidence: 99%

Largely Tunable Terahertz Circular Polarization Splitters Based on Patterned Graphene Nanoantenna Arrays

Liu

Meng

et al. 2019

IEEE Photonics J.

View full text Add to dashboard Cite

Dynamic manipulation of wavefront is vital for massive free-space optical applications. Here we propose a set of largely tunable circular polarization splitters leveraging graphene nanoantennas with high efficiency reaching 83% and wide frequency tunability range of 2 to 5 THz. By synergizing the electrically tunable surface plasmons of graphene with phase gradient metasurface, we numerically demonstrate two kinds of polarization splitters with complimentary graphene patterns to realize electrical tuning of operation frequency and efficient circular polarization demultiplexing. Using antennas of different geometric sizes, the device performances are investigated in several different terahertz bands. Our proposed structures can facilitate dynamically tunable broadband and high-speed applications such as polarization demultiplexing and optical switches in terahertz regime.

show abstract

Frequency-Tunable Mid-Infrared Cross Polarization Converters Based on Graphene Metasurface

Cited by 35 publications

References 23 publications

Recent Progress on Graphene-Functionalized Metasurfaces for Tunable Phase and Polarization Control

Recent Progress on Graphene-Functionalized Metasurfaces for Tunable Phase and Polarization Control

High-Efficiency Dual-Frequency Reflective Linear Polarization Converter Based on Metasurface for Microwave Bands

Largely Tunable Terahertz Circular Polarization Splitters Based on Patterned Graphene Nanoantenna Arrays

Contact Info

Product

Resources

About