Wavelength-switchable vortex beams based on a polarization-dependent microknot resonator

Zheng, Jinqiu; Yang, Ao; Wang, Teng; Cao, Ning; Liu, Mei; Liu, Huanhuan; Wang, Tingyun

doi:10.1364/prj.6.000396

Cited by 40 publications

(12 citation statements)

References 35 publications

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“…[1,2] SAM is associated with the photon spin and circular polarization states, while OAM is dependent on the field of spatial distribution. [3] The OAM beams, which are special electromagnetic waves characterized by helical phase wave front and doughnut-shaped intensity profile, [4] have attracted extensive interests due to their excellent performance in optical imaging, particles manipulating and quantum information processing. [5][6][7][8][9] In addition to these established fields, the OAM beams also have been used in modern optical/microwave communication systems.…”

Section: Introductionmentioning

confidence: 99%

Generation of Continuously Variable-mode Orbital Angular Momentum Beams

Xu¹,

Chen²,

Zhai³

et al. 2020

Eng. Sci.

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Orbital angular momentum (OAM) beam emitters with compact structure and high performance are highly desirable for wireless communication and radar technology. Here, we propose a compact emitter that only consists of a ring resonator and a feed line. Continuously-variable-mode OAM beams are generated by adjusting the wavelength and transmission path. The basic design principle and specific evaluation index are discussed. Both the simulated and experimental results demonstrate that the proposed emitter obtains the capacity of generating variable-modes. This approach opens a way for designing novel OAM beam emitter with desired properties.

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Section: Introductionmentioning

confidence: 99%

Generation of Continuously Variable-mode Orbital Angular Momentum Beams

Xu¹,

Chen²,

Zhai³

et al. 2020

Eng. Sci.

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“…When the optical path length satisfies an integer number of 2π, it forms resonances which yield light confinement boosting light-matter interaction. It finds applications in such as seawater temperature sensor [19], wavelength switchable vortex beam generation [20] and all-optical tunable devices [21] etc.…”

Section: Introductionmentioning

confidence: 99%

High Light Tuning Efficiency in All Optical In₂Se₃ Coated Micro Knot Resonator Structure

Luo

Ming

et al. 2020

IEEE Access

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In this paper, we demonstrate high light tuning efficiency in indium selenide (In 2 Se 3) coated micro knot resonator (MKR). Tuning of output optical power is realized via externally pump light excitation at wavelengths of 405, 532 and 660 nm. High light tuning efficiency is achieved with improved coating method, enhanced light-matter interaction, strong absorption of In 2 Se 3 and highly sensitive to change of the coupling condition. The tuning efficiency of the output optical power is up to 0.815 dB/mW. The temporal response of the structure is around 1.6 ms under 532-nm pump light excitation. The sensitivity depends on micro knot resonator resonance including Q factor and ER. The MKR tuning performance with various diameters of the resonator and the diameter of the microfiber is investigated. The advantages of this device are easy fabrication, all-optical tuning, high sensitivity and fast response. This proposed structure might find potential applications in all-fiber-optic based tunable devices such as optical modulator, detector, etc.

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“…Due to the orthogonality between different radio OAM modes, every OAM beam with different modes can be regarded as a communication channel. Thus, infinite modes can provide infinite channels, which can infinitely expand the communication capacity without increasing the bandwidth [8,9]. This characteristic of OAM beams may bring great advances in traditional wireless communication [10].…”

Section: Introductionmentioning

confidence: 99%

A Small-Divergence-Angle Orbital Angular Momentum Metasurface Antenna

Zhang

et al. 2019

Research

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Electromagnetic waves carrying an orbital angular momentum (OAM) are of great interest. However, most OAM antennas present disadvantages such as a complicated structure, low efficiency, and large divergence angle, which prevents their practical applications. So far, there are few papers and research focuses on the problem of the divergence angle. Herein, a metasurface antenna is proposed to obtain the OAM beams with a small divergence angle. The circular arrangement and phase gradient were used to simplify the structure of the metasurface and obtain the small divergence angle, respectively. The proposed metasurface antenna presents a high transmission coefficient and effectively decreases the divergence angle of the OAM beam. All the theoretical analyses and derivation calculations were validated by both simulations and experiments. This compact structure paves the way to generate OAM beams with a small divergence angle.

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Wavelength-switchable vortex beams based on a polarization-dependent microknot resonator

Cited by 40 publications

References 35 publications

Generation of Continuously Variable-mode Orbital Angular Momentum Beams

Generation of Continuously Variable-mode Orbital Angular Momentum Beams

High Light Tuning Efficiency in All Optical In₂Se₃ Coated Micro Knot Resonator Structure

A Small-Divergence-Angle Orbital Angular Momentum Metasurface Antenna

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