Generation and investigation of terahertz Airy beam realized using parallel-plate waveguides

Wu, Mengru; Lang, Tingting; Shi, Guohua; Han, Zhanghua

doi:10.1016/j.optcom.2017.10.039

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…On the other hand, Airy vortex beam carrying OAM mode, called Airy-OAM beam, has the properties of non-diffraction, self-healing and self-accelerating. It has attracted a lot of attentions on its generation, properties and potential applications recently [26,27,28]. However, as far as we have known, the propagation properties of Airy-OAM beam in underwater turbulence have not been reported.…”

Section: Introductionmentioning

confidence: 99%

Influence of oceanic turbulence on propagation of Airy vortex beam carrying orbital angular momentum

Wang

Yang²,

Zhao

2019

Optik

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With Rytov approximation theory, we derive the analytic expression of detection probability of Airy vortex beam carrying orbital angular momentum (OAM) through an anisotropic weak oceanic turbulence. We investigate the influences of turbulence parameters and beam parameters on the propagation properties of Airy-OAM beam. The numerical simulation results show that the anisotropic oceanic turbulence with a lower dissipation rate of temperature variance, smaller ratio of temperature and salinity contributions to the refractive index spectrum, higher dissipation rate of kinetic energy per unit mass of fluid, bigger inner scale factor, larger anisotropic coefficient causes the larger detection probability of Airy-OAM beam. Moreover, the Airy-OAM beam with a smaller topological charge, larger main ring radius and longer wavelength, has strong resistance to oceanic turbulent interference. Additionally, the detection probability decreases with the increase of receiving aperture size. In comparison with Laguerre-Gaussian-OAM beam, Airy-OAM beam has more anti-interference to turbulence when its topological charge is larger than 5 due to its non-diffraction and self-healing characteristics. The results are useful for underwater optical communication link using Airy-OAM beam.

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Section: Introductionmentioning

confidence: 99%

Influence of oceanic turbulence on propagation of Airy vortex beam carrying orbital angular momentum

Wang

Yang²,

Zhao

2019

Optik

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“…In optics, Berry and Balazs theoretically revealed that the Airy packet can be a solution of the Schrödinger equation 3) and its unique behavior was demonstrated experimentally by Siviloglou et al 4) Moreover, a metasurface technology has been applied to achieve the attractive characteristics of the Airy beam, such as self-bending and self-healing. 5) The acoustic Airy beam has often been studied with the hope of applying it to acoustic focusing or acoustic trapping. [6][7][8][9][10] Most of these studies have focused on the design of Airy beams and their feasibility through numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Self-bending airborne ultrasound beam using a binary lens based on the Airy function

Yamamoto¹,

Nomura²

2021

Jpn. J. Appl. Phys.

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Self-bending of a beam of sound was previously achieved by an acoustic metasurface that modified the amplitude and phase modulations. However, fabricating a fine-structured device for ultrasound is difficult because it has a short wavelength. In this paper, we propose a simple binary acoustic lens for a self-bending ultrasound beam in air at 40 kHz. The lens has transparent and opaque areas and was designed using the Airy function. The beam bending was evaluated by simulations and experiments. The simulations showed that the proposed lens achieved beam self-bending, although the concentration of energy in the main beam was inferior to that for phase-coded modulation. The experiments demonstrated that self-bending is feasible using a binary lens made of a polypropylene sheet, and the measured sound fields agreed well with the simulations. These results suggest that a self-bending beam of ultrasound is possible with a lens having a simple binary structure.

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“…[3,[5][6][7] The terahertz wave (THz), commonly referred to as T-rays, sub-millimeter, or far infrared, refers to the electromagnetic radiation at the frequency from 0.1 THz to 10 THz, has attracted much attention recently partially because it is one of the potential candidates in the high frequencies communication methods. The techniques for the generation of THz wave were developed rapidly in recent years [8][9][10][11] and promising applications of THz waves can be found in various fields. [12] As the basis of communication between the hypersonic vehicles and the ground control center, the interaction between plasma and THz wave (absorption, reflection, and transmission) is a key issue to be analyzed.…”

Section: Introductionmentioning

confidence: 99%

Propagation characteristics of oblique incidence terahertz wave through non-uniform plasma

Chen¹,

Sun²,

Han³

et al. 2019

Chinese Phys. B

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The propagation characteristics of oblique incidence terahertz (THz) waves through non-uniform plasma are investigated by the shift-operator finite-difference time-domain (SO-FDTD) method combined with the phase matching condition. The electron density distribution of the non-uniform plasma is assumed to be in a Gaussian profile. Validation of the present method is performed by comparing the results with those obtained by an analytical method for a homogeneous plasma slab. Then the effects of parameters of THz wave and plasma layer on the propagation properties are analyzed. It is found that the transmission coefficients greatly depend on the incident angle as well as on the thickness of the plasma, while the polarization of the incident wave has little influence on the propagation process in the range of frequency considered in this paper. The results confirm that the THz wave can pass through the plasma sheath effectively under certain conditions, which makes it a potential candidate to overcome the ionization blackout problem.

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Generation and investigation of terahertz Airy beam realized using parallel-plate waveguides

Cited by 6 publications

References 25 publications

Influence of oceanic turbulence on propagation of Airy vortex beam carrying orbital angular momentum

Influence of oceanic turbulence on propagation of Airy vortex beam carrying orbital angular momentum

Self-bending airborne ultrasound beam using a binary lens based on the Airy function

Propagation characteristics of oblique incidence terahertz wave through non-uniform plasma

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