Nonlinear Optical Research

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (10 April 2023) | Viewed by 2804

Special Issue Editor


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Guest Editor
School of Physics and Optoelectronics, South China University of Technology, No. 381 Wushan Road, Tianhe District, Guangzhou 510641, China
Interests: micronano photonics; nonlinear optical research; fiber optics; active laser

Special Issue Information

Dear Colleagues,

Symmetry plays a crucial role in nonlinear optics. Since second-harmonic generation was experimentally found in non-centrosymmetric crystals, nonlinear optical research has attracted a lot of attention in recent decades. It is known that the nonlinear optical response of materials is strongly dependent on their crystalline symmetries and crystal qualities. To benefit from recent advances in novel nonlinear optical materials and the associated state-of-the-art manufacture techniques, the field of nonlinear optical research has grown enormously in both theoretical and experimental aspects, such as nonlinear optical waveguides and nonlinear metasurfaces. This Special Issue will focus on recent advances in the field of nonlinear optics ranging from fundamental studies of nonlinear light–matter interactions to applications such as frequency conversion, optical switching, waveguides, micro-resonators, metasurfaces, micro- and nanostructures, electro-optics, etc.

Prof. Dr. Huakang Yu
Guest Editor

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Keywords

  • nonlinear optical effects
  • integrated nonlinear circuit
  • nonlinear frequency conversion 
  • nonlinear micro- and nanostructures

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Published Papers (2 papers)

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Research

14 pages, 1021 KiB  
Article
Gap Solitons in Fiber Bragg Gratings Having Polynomial Law of Nonlinear Refractive Index and Cubic–Quartic Dispersive Reflectivity by Lie Symmetry
by Sandeep Malik, Sachin Kumar, Anjan Biswas, Yakup Yıldırım, Luminita Moraru, Simona Moldovanu, Catalina Iticescu, Seithuti P. Moshokoa, Dorin Bibicu and Abdulaziz Alotaibi
Symmetry 2023, 15(5), 963; https://doi.org/10.3390/sym15050963 - 23 Apr 2023
Cited by 21 | Viewed by 1547
Abstract
The current paper recovers cubic–quartic optical solitons in fiber Bragg gratings having polynomial law of nonlinear refractive index structures. Lie symmetry analysis is carried out, starting with the basic analysis. Then, it is followed through with improved Kudryashov and generalized Arnous schemes. The [...] Read more.
The current paper recovers cubic–quartic optical solitons in fiber Bragg gratings having polynomial law of nonlinear refractive index structures. Lie symmetry analysis is carried out, starting with the basic analysis. Then, it is followed through with improved Kudryashov and generalized Arnous schemes. The parameter constraints are also identified for the existence of such solitons. Numerical surface plots support the adopted applied analysis. Full article
(This article belongs to the Special Issue Nonlinear Optical Research)
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20 pages, 20608 KiB  
Article
Propagation and Parametric Amplification in Four-Wave Mixing Processes: Intramolecular Coupling and High-Order Effects
by José Luis Paz, Patricio J. Espinoza-Montero, Marcos Loroño, Fernando Javier Torres, Lenin González-Paz, Edgar Márquez, Joan Vera-Villalobos, José R. Mora, Fernando Moncada and Ysaias J. Alvarado
Symmetry 2022, 14(2), 301; https://doi.org/10.3390/sym14020301 - 2 Feb 2022
Cited by 1 | Viewed by 2223
Abstract
A strong pump-power dependence of the four-wave mixing (FWM) signal for an aqueous solution of Malachite green is reported. The characteristics of the pump-power dependence of the nonlinear signal are reproduced by a theoretical model based on the coupling between pump-probe, considering signal [...] Read more.
A strong pump-power dependence of the four-wave mixing (FWM) signal for an aqueous solution of Malachite green is reported. The characteristics of the pump-power dependence of the nonlinear signal are reproduced by a theoretical model based on the coupling between pump-probe, considering signal fields and propagation effects. The effect of the intramolecular coupling on the nonlinear intensity of the FWM signal is studied using a model molecule consisting of two-coupled harmonic curves of electronic energies with minima displaced in energy and nuclear positions. Two-vibrational states are considered while including non-adiabatic effects for the two-state model. Moreover, the coupling among the field components, as well as the propagation effects, are studied by considering a constant pump-intensity. Our calculation scheme, considering both the intramolecular coupling effects in the description of the molecular structure and the effects produced by the propagation of the FWM signal along the optical length, allows the exponential dependence of the latter, as the intensity of the pumping beam increases. Our treatments do not require the inclusion of other non-resonant processes outside the RWA approximation, due to the consideration of an adiabatic basis. Full article
(This article belongs to the Special Issue Nonlinear Optical Research)
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