A planar chiral meta-surface for optical vortex generation and focusing

Ma, Xiaoliang; Pu, Mingbo; Li, Xiong; Huang, Cheng; Wang, Yanqin; Pan, Wenbo; Zhao, Bo; Cui, Jianhua; Wang, Changtao; Zhao, Zeyu; Luo, Xiangang

doi:10.1038/srep10365

Cited by 184 publications

(131 citation statements)

References 37 publications

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“…By means of elliptical optical antennas, which instead of converting one linear polarization to the other as in previous works, enable incident right-handed circularly polarized light to be almost converted into left-handed circularly polarized light [54]. In the latter case, the abrupt phase change occurs for circularly polarized light that is converted to its opposite helicity, in such a way that the created focused light carries orbital angular momentum.…”

Section: Plasmonic Metasurfacesmentioning

confidence: 95%

Recent Progress in Far-Field Optical Metalenses

Naserpour¹,

Hashemi²,

Rodríguez³

2017

Metamaterials - Devices and Applications

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In this chapter, a review of the recent advances in optical metalenses is presented, with special emphasis in their experimental implementation. First, the Huygens' principle applied to ultrathin engineered metamaterials is introduced for the purpose of giving curvature to the wavefront of free-space wave fields. Primary designs based on metallic nanoslits and holey screens occasionally with variant width are first examined. Holographic plasmonic lenses are also explored offering a promising route to realize nanophotonic components. More recent metasurfaces based on nano-antenna resonators, either plasmonic or high-index dielectric, are analyzed in detail. Furthermore, 2D material lenses in the scale of a few nanometers enabling the thinnest lenses to date are here considered. Finally, dynamically reconfigurable focusing devices are reported for creating a scenario with new functionalities.

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Section: Plasmonic Metasurfacesmentioning

confidence: 95%

Recent Progress in Far-Field Optical Metalenses

Naserpour¹,

Hashemi²,

Rodríguez³

2017

Metamaterials - Devices and Applications

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“…Well-controlled defects in LCs can serve as optical vortex inductors, [16][17][18][19][20] which have recently attracted attention for their fundamental properties and potential applications in quantum computational schemes and large data optical communication. 21,22 …”

Section: Introductionmentioning

confidence: 99%

Standing wave-mediated molecular reorientation and spontaneous formation of tunable, concentric defect arrays in liquid crystal cells

Migara

Song

2018

NPG Asia Mater

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Standing waves are involved in various fundamental, natural phenomena over a wide range of scales, that is, from electron orbitals to planetary oscillations. Interactions between standing waves and matter are of interest. Here we demonstrate spontaneous, nematodynamic standing waves in a nonlinear liquid crystal medium and their interactions with director fields. The standing waves hold unique features such as diagonal nodal lines, self-adaption to broad resonance frequencies and a step-like increase in the wavelength with the increasing frequency. Furthermore, the standing wave causes unexpected phenomena that can be used in various applications; for example, it can manipulate the molecular orientation to form tunable, periodic defect arrays with concentric director profiles, which can serve as an optical vortex array inducer or tunable micro-liquid crystal lens array. The standing wave also exerts asymmetric mechanical pressure that can relocate small particles. The results lead to new approaches in director manipulation, colloidal assembly and singular optics.

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“…In these artificial media, the optical and circular dichroism properties are many orders of magnitude higher than those in natural chiral materials, whereas negative refractive index property can be achieved without combination of negative permeability and negative permittivity. In addition to these interesting properties, use of chiral metasurfaces instead of chiral metamaterials offers other original characteristics such as the asymmetric transmission of electromagnetic waves through the two opposite sides [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Chiral All-Dielectric Metasurface Based on Elliptic Resonators with Circular Dichroism Behavior

Yahyaoui

Rmili

2018

International Journal of Antennas and Propagation

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We present the design of a new microwave all-dielectric chiral metasurface with circular dichroism behavior based on elliptic dielectric resonators (EDRs). During the design procedure, we have first optimized numerically the effects of the main design parameters such as the resonator's size and orientation, as well as the size of the slot within them, on the metasurface transmission over the frequency band 10-20 GHz. Measurements on the final metasurface prototype have shown a large circular dichroism (Δ = 0 61 and Δ = 0 5) over two bands .05 GHz) with ellipticities close to 45°which means that the developed device can be used as a circular polarization filter and circular polarizer at microwave frequencies.

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A planar chiral meta-surface for optical vortex generation and focusing

Cited by 184 publications

References 37 publications

Recent Progress in Far-Field Optical Metalenses

Recent Progress in Far-Field Optical Metalenses

Standing wave-mediated molecular reorientation and spontaneous formation of tunable, concentric defect arrays in liquid crystal cells

Chiral All-Dielectric Metasurface Based on Elliptic Resonators with Circular Dichroism Behavior

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