| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Trajectory engineering via a space-fractional Schrödinger equation with dynamic linear index potential |
| Yunji Meng(孟云吉)1, Youwen Liu(刘友文)2, Haijiang Lv(吕海江)1 |
1 School of Information Engineering, Huangshan University, Huangshan 245041, China;
2 College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China |
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Abstract We theoretically and numerically study the propagation dynamics of a Gaussian beam modeled by the fractional Schrödinger equation with different dynamic linear potentials. For the limited case α=1 (α is the Lévy index) in the momentum space, the beam suffers a frequency shift which depends on the applied longitudinal modulation and the involved chirp. While in the real space, by precisely controlling the linear chirp, the beam will exhibit two different evolution characteristics: one is the zigzag trajectory propagation induced by multi-reflection occurring at the zeros of spatial spectrum, the other is diffraction-free propagation. Numerical simulations are in full accordance with the theoretical results. Increase of the Lévy index not only results in the drift of those turning points along the transverse direction, but also leads to the delocalization of the Gaussian beam.
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Received: 09 October 2019
Revised: 26 December 2019
Accepted manuscript online:
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PACS:
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42.25.Bs
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(Wave propagation, transmission and absorption)
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42.25.Fx
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(Diffraction and scattering)
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42.30.Kq
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(Fourier optics)
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| Fund: Project supported by the Natural Science Research Project of Anhui Provincal Education Department of China (Grant Nos. KJHS2018B01 and KJ2018A0407), the National Natural Science Foundation of China (Grant No. 11804112), the Natural Science Foundation of Anhui Province of China (Grant No. 1808085QA22), and Start-up Fund of Huangshan University, China (Grant No. 2015xkjq001). |
Corresponding Authors:
Yunji Meng
E-mail: meng_yunji@msn.com
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Cite this article:
Yunji Meng(孟云吉), Youwen Liu(刘友文), Haijiang Lv(吕海江) Trajectory engineering via a space-fractional Schrödinger equation with dynamic linear index potential 2020 Chin. Phys. B 29 054201
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