Multi-functional polarization conversion manipulation via graphene-based metasurface reflectors.
TLDR
This work presents an efficient polarization conversion device via using a hollow graphene metasurface that can simultaneously realize a series of excellent performances, including the broadband x-to-y cross polarization conversion (CPC) function with near unity polarization conversion ratio (PCR), dual-frequency linear- to-circular polarization Conversion (LTC) function, and highly sensitive polarization conversion function manipulation under wide oblique incidence angle range.Abstract:
In this work, we present an efficient polarization conversion device via using a hollow graphene metasurface. The platform can simultaneously realize a series of excellent performances, including the broadband x-to-y cross polarization conversion (CPC) function with near unity polarization conversion ratio (PCR), dual-frequency linear-to-circular polarization conversion (LTC-PC) function, and highly sensitive polarization conversion function manipulation under wide oblique incidence angle range. For instance, the proposed device obtains an x-to-y CPC function with the bandwidth up to 1.83 THz (χPCR ≥98.8%). Moreover, the x-to-y CPC function can be switched to LTC-PC function via artificially tuning the Fermi energy of graphene. The maximal frequency shift sensitivity (S) of polarization conversion function reaches 23.09 THz/eV, suggesting a frequency shift of 2.309 THz for the LTC-PC function when the chemical potential is changed by 0.1 eV. Based on these superior performances, the polarization converter can hold potential applications in integrated and compact devices, such as polarization sensor, switches and other optical polarization control components.read more
Citations
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Simultaneous realization of polarization conversion for reflected and transmitted waves with bi-functional metasurface
TL;DR: In this paper , a bilayered metasurface is presented to simultaneously manipulate the polarized states of reflected and transmitted microwaves, regardless of whether an incident electromagnetic wave is xpolarized or y-polarised.
Journal ArticleDOI
Multifunctional metasurface for broadband absorption, linear and circular polarization conversions
TL;DR: In this paper, a multifunctional metasurface (MFMS) based on graphene and photosensitive silicon (Si) is proposed, which integrates three functions: broadband absorption, broadband linear and circular polarization conversions in the THz band.
Journal ArticleDOI
Multi-functional high-efficiency reflective polarization converter based on an ultra-thin graphene metasurface in the THz band.
TL;DR: In this article, an ultra-thin reflective metasurface is proposed for polarization conversion in the terahertz band, where each unit cell is composed of graphene ribbons lying diagonally on silicon substrate.
Journal ArticleDOI
Broadband and switchable terahertz polarization converter based on graphene metasurfaces
TL;DR: The proposed polarization converters of broad bandwidth, active tunability, and switchable functionality will essentially make a significant progress in terahertz technology and device applications, and can be widely utilized in THz communications, sensing and spectroscopy.
Journal ArticleDOI
Terahertz graphene metasurfaces for cross-polarized deflection, focusing, and orbital angular momentum.
Canhui He,Zhengyong Song +1 more
TL;DR: In this paper , four graphene-based meta-atoms are designed to regulate polarization state of terahertz wave by changing Fermi energy level of graphene, and three dynamic metasurfaces are designed for controlling wavefront of reflected beam.
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