Optical soliton formation and dynamic characteristics in photonic Moiré lattices

IF 4.6 2区 物理与天体物理 Q1 OPTICS
Da-Sheng Mou, Zhi-Zeng Si, Wei-Xin Qiu, Chao-Qing Dai
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引用次数: 0

Abstract

The effect of nonlinearity on the topologically protected linear interface modes in photonic moiré lattice is theoretically investigated. The linear topological mode of moiré lattice is transformed into a set of topological gap solitons under the focusing nonlinearity. These solitons are stable up to a certain propagation constant in the lattice range. Stable symmetric and antisymmetric dipole solitons as well as quadrupole solitons can be formed in the continuously-periodic photon moiré lattice, however, they exhibit only low amplitudes, which indicates weak nonlinearities even when the band gap of the moiré lattice is wide. In addition, the propagation dynamics of metastable and unstable quadrupoles are discussed. Therefore, if the initial beam has a high amplitude, it will either evolve into an unstable soliton that is not a member of the topological gap soliton family, or delocalization.

光子莫伊里晶格中的光孤子形成和动态特性
从理论上研究了非线性对光子莫尔雷晶格中拓扑保护线性界面模式的影响。在聚焦非线性作用下,莫尔雷晶格的线性拓扑模式转化为一组拓扑间隙孤子。这些孤子在晶格范围内达到一定传播常数时是稳定的。在连续周期光子摩尔纹阵中可以形成稳定的对称和非对称偶极孤子以及四极孤子,但它们只表现出较低的振幅,这表明即使摩尔纹阵的带隙很宽,其非线性也很弱。此外,还讨论了可陨落和不稳定四偶极子的传播动力学。因此,如果初始光束具有较高的振幅,它要么会演变成不属于拓扑隙孤子家族的不稳定孤子,要么会发生脱局域。
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来源期刊
CiteScore
8.50
自引率
10.00%
发文量
1060
审稿时长
3.4 months
期刊介绍: Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems
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