Transfer of orbital angular momentum through sub-wavelength waveguides

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

doi:10.1364/oe.23.002857

Cited by 12 publications

(6 citation statements)

References 23 publications

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“…Owing to its complex conductivity, graphene supports surface plasmon modes, accompanied with extremely short effective wavelength. Based on the exotic electronic transfer properties, graphene-based plasmonic waveguide devices and even Luneburg lens were constructed (see Figures 51(a Very recently, we demonstrated that spiral surface plasmon could be utilized to transfer orbital angular momentum (OAM) [253]. Graphene-based microtube was demonstrated to be able to accomplish this goal perfectly.…”

Section: Active Absorption Modulationmentioning

confidence: 99%

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Luo

et al. 2015

International Journal of Antennas and Propagation

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As two-dimensional metamaterials, metasurfaces have received rapidly increasing attention from researchers all over the world. Unlike three-dimensional metamaterials, metasurfaces can be utilized to control the electromagnetic waves within one infinitely thin layer, permitting substantial advantages, such as easy fabrication, low cost, and high degree of integration. This paper reviews the history and recent development of metasurfaces, with particular emphasis on the theory and applications relating to the frequency response, phase shift, and polarization state control. Based on the current status of various applications, the challenges and future trends of metasurfaces are discussed.

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Section: Active Absorption Modulationmentioning

confidence: 99%

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Luo

et al. 2015

International Journal of Antennas and Propagation

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“…In the last several years, the interaction of light with structured material was extensively studied to generate the required OAM states. The diverse structures include liquid crystal spatial light modulator (SLM) 8 , space-variant antenna arrays 12 , ring resonators 13 , nano-wires 14 15 and nano-holes 16 17 18 19 . Among these devices, plasmonic structures are of particular importance because the development requirement of integrated opto-electro system is becoming more and more urgent 20 21 22 23 24 .…”

mentioning

confidence: 99%

Near-field collimation of light carrying orbital angular momentum with bull’s-eye-assisted plasmonic coaxial waveguides

Zhao

et al. 2015

Sci Rep

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The orbital angular momentum (OAM) of light, as an emerging hotspot in optics and photonics, introduces many degrees of freedom for applications ranging from optical communication and quantum processing to micromanipulation. To achieve a high degree of integration, optical circuits for OAM light are essential, which are, however, challenging in the optical regime owing to the lack of well-developed theory. Here we provide a scheme to guide and collimate the OAM beam at the micro- and nano-levels. The coaxial plasmonic slit was exploited as a naturally occurring waveguide for light carrying OAM. Concentric grooves etched on the output surface of the coaxial waveguide were utilized as a plasmonic metasurface to couple the OAM beam to free space with greatly increased beam directivity. Experimental results at λ = 532 nm validated the novel transportation and collimating effect of the OAM beam. Furthermore, dynamic tuning of the topological charges was demonstrated by using a liquid crystal spatial light modulator (SLM).

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“…However, the employed devices are bulky and do not lend themselves to nanophotonic system integration. Recent progress in nano-fabrication facilitates the replacement of cumbersome optical components by ultrathin, planar metasurfaces or subwavelength waveguides [14][15][16][17][18][19][20][21][22]. Although successful generation of OAM-carrying beams, there are also some challenges that need to be solved.…”

Section: Introductionmentioning

confidence: 99%

Generation and Manipulation of Orbital Angular Momentum by All-Dielectric Metasurfaces

et al. 2015

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We propose the design of a planar dielectric metasurface to overcome the ohmic loss and discrete phase profile of metallic metasurfaces. The proposed metasurface is composed of annular subwavelength gratings, which can be taken regard as a space-variant Pancharatnam-Berry phase optical element. Consequently, the OAM-carrying beams with topological charge ℓ =±2 is generated with the efficiency high up to 90 %. In addition, we demonstrate a method to produce fractional, quasi-focusing, and quasi-non-diffracting OAM-carrying beams by adopting appropriate width modulation of the annular gratings. The proposed metasurfaces offering superiorities in high efficiency, phase continuity, and manipulative diversity may have potential applications in integrated-photonics and optical communication system.

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Transfer of orbital angular momentum through sub-wavelength waveguides

Cited by 12 publications

References 23 publications

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Near-field collimation of light carrying orbital angular momentum with bull’s-eye-assisted plasmonic coaxial waveguides

Generation and Manipulation of Orbital Angular Momentum by All-Dielectric Metasurfaces

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