This work presents a numerical investigation of second-harmonic generation (SHG) by ultrashort femtosecond laser pulses in nonlinear photonic crystals of gallium nitride (GaN) with periodically modulated second-order nonlinear susceptibilityχ2. A coupled-wave model is employed to describe the spatial-temporal evolution of the fundamental and second-harmonic pulses, taking into account linear absorption, group-velocity mismatch, dispersive effects, andquasi-phase matching. The influence of these factors on the conversion efficiency and temporal pulse profiles is systematically analyzed. The results demonstrate that linear absorption inGaN significantly limits the effective interaction length and reduces the achievable conversionefficiency in the femtosecond regime. Dispersive effects lead to a pronounced decrease in conversion efficiency for shorter pulses and cause substantial temporal pulse distortion, includingpulse splitting. In addition, it is shown that the second-harmonic generation process is highly sensitive to deviations of the domain length from the value required for quasi-phase matching,with even moderate fabrication errors resulting in a noticeable reduction in efficiency. Thesefindings highlight the critical role of dispersion management, absorption minimization, andprecise domain engineering in the development of efficient femtosecond frequency convertersbased on GaN.
| Mualliflar | Собиров, О.И., Сапаев, У.К. |
|---|---|
| Jurnal | O‘zbekiston fizika jurnali |
| Nashriyot | Ўзбекистон Республикаси Фанлар академияси |
| ISSN | 1025-8817, 2181-077X |
| Nashr sanasi | 2026-05-08 |
| Jild | 28 |
| Son | 1 |
| Til | Ingliz |
| Ilmiy soha | Fizika-matematika |
| DOI | 10.52304/.v28i1.634 |
| Indeksga qo‘shilgan | 2026-08-26 |
DOI: 10.52304/.v28i1.634 · Maqolaning asl sahifasi
генерация второй гармоники, нелинейная оптика, GaN, фазовый синхронизм, квазисинхронизм фаз, фемтосекундные лазерные импульсы, дисперсия групповой скорости, оптическое преобразование частоты, фотоника, second-harmonic generation, nonlinear optics, GaN, phase matching, quasi-phase matching, femtosecond laser pulses, group-velocity dispersion, optical frequency conversion, photonics
| APA | Собиров, О.И., & Сапаев, У.К. (2026). Simulation of second harmonic generation of femtosecond pulses in periodically polarized GaN crystals. O‘zbekiston fizika jurnali, 28(1). https://doi.org/10.52304/.v28i1.634 |
|---|---|
| GOST (OAK) | Собиров, О.И., Сапаев, У.К. Simulation of second harmonic generation of femtosecond pulses in periodically polarized GaN crystals // O‘zbekiston fizika jurnali. – 2026. – T. 28, № 1. – DOI: 10.52304/.v28i1.634. |
| MLA | Собиров, О.И., and Сапаев, У.К. “Simulation of second harmonic generation of femtosecond pulses in periodically polarized GaN crystals.” O‘zbekiston fizika jurnali, 28(1), 2026. https://doi.org/10.52304/.v28i1.634 |
| Chicago | Собиров, О.И., and Сапаев, У.К. “Simulation of second harmonic generation of femtosecond pulses in periodically polarized GaN crystals.” O‘zbekiston fizika jurnali, 28(1) (2026). https://doi.org/10.52304/.v28i1.634 |
| Harvard | Собиров, О.И., and Сапаев, У.К (2026) ‘Simulation of second harmonic generation of femtosecond pulses in periodically polarized GaN crystals’, O‘zbekiston fizika jurnali, 28(1). https://doi.org/10.52304/.v28i1.634 |
| BibTeX | @article{article2026,
title = {Simulation of second harmonic generation of femtosecond pulses in periodically polarized GaN crystals},
author = {Собиров, О.И. and Сапаев, У.К.},
journal = {O‘zbekiston fizika jurnali},
year = {2026},
volume = {28},
number = {1},
doi = {10.52304/.v28i1.634},
url = {https://doi.org/10.52304/.v28i1.634}
} |
Boshqa maqola uchun iqtibos tayyorlash
In the study, the performance and working mechanisms of memristors based on organicinorganichalide perovskite (OIHP) materials with two distinct configurations: ITO/PEDOT:PSS/Cs0.15MA0.15FA0.7Pb(I0.8Br0.2)3/InGa and…
The conducted experiments and theoretical analysis revealed that picosecond-durationNd:YAG laser irradiation induces highly complex thermal and hydrodynamic processes on thesurface of copper foil. Spectroscopic…
We investigated quasi-periodic pulsations (QPPs) in X-ray and extreme-ultraviolet (EUV)emissions during the X-class solar flare (SOL2022-03-30T). Two modes of quasi-periodic pulsations were detected. A longer…
In the study, the physical parameters of open star clusters in Stock catalogue were analyzed.An inverse linear relationship between the color excess E(B–V) and the age of relatively youngclusters was found. A linear…
This article presents a compiled catalog of 408 galaxy groups. In the appentdix [1, 2] physicalparameters of 80 galaxy groups are provided as a sample. The number of galaxies in thegroups ranges from 5 to 30. Physical…
This paper presents a theoretical studying the effects of strain and compositional variations onthe linear and nonlinear optical properties of InP/InAs1-xPx/InP quantum wells. The Schrödinger equation was solved to…
This study describes the morphological, optical, and photocatalytic properties of TiO2 nanostructures synthesized from FTO-coated glass plates. Studies have shown that TiO2 nanocrystals with diameters of 50-70 nm can be…
In the work, the synthesis processes of graphene layers within polymer materials under theinfluence of high temperature and laser energy are investigated. During thermal stimulation,the carbonization and…
In the present article, the structure of magnetic domains and the mechanisms of their formationin the Fe5Ga6Gd2YZr crystal are examined. The processes of domain emergence, the regularities of their reconfiguration under…
The spectral dependence of optical activity in bismuth silicate (Bi12SiO20) and bismuth germanate (Bi12GeO20) crystals was experimentally studied in the wavelength range of 488–1150nm. It was shown that the specific…
O‘zbekiston fizika jurnali — barcha maqolalar · 2026-yil arxivi
This article presents the results of 2018-2023, such as biological diversity, inter-landscape distribution characteristics, density,and number of straggly insects identified from natural and anthropogenic areas of…
This article observational data on the species composition, distribution, population, density, and seasonal damage caused causedby herbivorus bugs. Observationes were carried out in April and September 2021. When…
In the article, the research fields of some species belonging to Paeonia, their significance in human life, adaptation features tovarious ecological conditions are highlighted, and the ecologist groups and other…
This article studies the number of species, population density of terrestrial mollusks of the Topalangdarya basin, located in theSurkhandarya region of Uzbekistan, in various altitudinal regions and biotopes and…
This article sheds light on changes in biomass formation and antimicrobial activity against test pathogenic strains under theinfluence of epigenetic modifiers and elicitors of the endophytic fungus Penicillium…
Shahimardonsoy covered issues such as the soil in the river basin and measures to increase its condition, salinity and fertility, theflora and fauna present in the basin landscape and their conservation.