TY - JOUR

T1 - Propagation dynamics of radially polarized symmetric Airy beams in the fractional Schrödinger equation

AU - He, Shangling

AU - Malomed, Boris A.

AU - Mihalache, Dumitru

AU - Peng, Xi

AU - He, Yingji

AU - Deng, Dongmei

N1 - Publisher Copyright:
© 2021 Elsevier B.V.

PY - 2021/7/19

Y1 - 2021/7/19

N2 - We analyze the propagation dynamics of radially polarized symmetric Airy beams (R-SABs) in a (2+1)-dimensional optical system with fractional diffraction, modeled by the fractional Schrödinger equation (FSE) characterized by the Lévy index, α. The autofocusing effect featured by such beams becomes stronger, while the focal length becomes shorter, with the increase of α. The effect of the intrinsic vorticity on the autofocusing dynamics of the beams is considered too. Then, the ability of R-SABs to capture nano-particles by means of radiation forces is explored, and multiple capture positions emerging in the course of the propagation are identified. Finally, we find that the propagation of the vortical R-SABs with an off-axis shift leads to rupture of the ring-shaped pattern of the power-density distribution.

AB - We analyze the propagation dynamics of radially polarized symmetric Airy beams (R-SABs) in a (2+1)-dimensional optical system with fractional diffraction, modeled by the fractional Schrödinger equation (FSE) characterized by the Lévy index, α. The autofocusing effect featured by such beams becomes stronger, while the focal length becomes shorter, with the increase of α. The effect of the intrinsic vorticity on the autofocusing dynamics of the beams is considered too. Then, the ability of R-SABs to capture nano-particles by means of radiation forces is explored, and multiple capture positions emerging in the course of the propagation are identified. Finally, we find that the propagation of the vortical R-SABs with an off-axis shift leads to rupture of the ring-shaped pattern of the power-density distribution.

KW - Airy waves

KW - Autofocusing

KW - Fractional diffraction

KW - Vorticity

UR - http://www.scopus.com/inward/record.url?scp=85106268683&partnerID=8YFLogxK

U2 - 10.1016/j.physleta.2021.127403

DO - 10.1016/j.physleta.2021.127403

M3 - מאמר

AN - SCOPUS:85106268683

VL - 404

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

SN - 0375-9601

M1 - 127403

ER -