Cross-nanofin-based waveplate pixels for broadband hybrid polarization coding in near-field
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Cross-nanofin-based waveplate pixels for broadband hybrid polarization coding in near-field. / Du, Shuo; Liu, Zhe; Sun, Chi; Zhu, Wei; Geng, Guangzhou; Ye, Haitao; Li, Junjie; Gu, Changzhi.
I: Nanophotonics, Bind 10, Nr. 5, 23.02.2021, s. 1505-1515.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Cross-nanofin-based waveplate pixels for broadband hybrid polarization coding in near-field
AU - Du, Shuo
AU - Liu, Zhe
AU - Sun, Chi
AU - Zhu, Wei
AU - Geng, Guangzhou
AU - Ye, Haitao
AU - Li, Junjie
AU - Gu, Changzhi
N1 - Hy-Q
PY - 2021/2/23
Y1 - 2021/2/23
N2 - As an inherent characteristic of light, polarization plays important roles in information storage, display and even encryption. Metasurfaces, composed of specifically designed subwavelength units in a two-dimensional plane, offer a great convenience for polarization manipulation, yet improving their integrability and broadband fidelity remain significant challenges. Here, based on the combination of various subwavelength cross-nanofins (CNs), a new type of metasurface for multichannel hybrid polarization distribution in near-field is proposed. Sub-wavelength CN units with various waveplate (WP) functionalities, such as frequency-division multiplexing WP, half-WP and quarter-WP are implemented with high efficiency in broadband. High-resolution grayscale image encryption, multi-image storage and rapid polarization detection are demonstrated by encoding the WP pixels into single, double and four channels, respectively. All these applications possess good fidelity in an ultrabroad wavelength band from 1.2 to 1.9 mu m, and the high degree of integrability, easy fabrication and multifunction make the CN-shaped WP pixels a promising candidate in optical device miniaturization, quantum applications and imaging technologies.
AB - As an inherent characteristic of light, polarization plays important roles in information storage, display and even encryption. Metasurfaces, composed of specifically designed subwavelength units in a two-dimensional plane, offer a great convenience for polarization manipulation, yet improving their integrability and broadband fidelity remain significant challenges. Here, based on the combination of various subwavelength cross-nanofins (CNs), a new type of metasurface for multichannel hybrid polarization distribution in near-field is proposed. Sub-wavelength CN units with various waveplate (WP) functionalities, such as frequency-division multiplexing WP, half-WP and quarter-WP are implemented with high efficiency in broadband. High-resolution grayscale image encryption, multi-image storage and rapid polarization detection are demonstrated by encoding the WP pixels into single, double and four channels, respectively. All these applications possess good fidelity in an ultrabroad wavelength band from 1.2 to 1.9 mu m, and the high degree of integrability, easy fabrication and multifunction make the CN-shaped WP pixels a promising candidate in optical device miniaturization, quantum applications and imaging technologies.
KW - broadband and high-efficiency metasurface
KW - high-resolution grayscale image
KW - multi-image storage
KW - rapid polarization detection
KW - subwavelength waveplate pixels
KW - DIELECTRIC METASURFACES
KW - RESOLUTION
U2 - 10.1515/nanoph-2020-0621
DO - 10.1515/nanoph-2020-0621
M3 - Journal article
VL - 10
SP - 1505
EP - 1515
JO - Nanophotonics
JF - Nanophotonics
SN - 2192-8606
IS - 5
ER -
ID: 260255030