Pub Date : 2024-04-30DOI: 10.1142/s0218863524500085
B. D. Vhanmore, S. P. Rajmane, S. B. Sadale, S. D. Patil, H. M. Shinde, R. J. Kamble, M. V. Takale
This work investigates the polarization modes i.e., Extraordinary (E-mode) and Ordinary (O-mode) on self-focusing of higher-order mode of elegant Hermite-cosh-Gaussian (EHChG) laser beams within collisionless magnetized plasma medium. In this study, the authors have taken transverse electromagnetic () mode with mode indices (0, 4) and explored. The ponderomotive force is primarily responsible for the dielectric constant’s nonlinearity in this context. Also, WKB and paraxial approximations via the parabolic wave equation approach are used to establish the general form of differential equations for beam-width parameters in both transverse dimensions of the beam. In this paper, the authors have theoretically investigated the dominance of polarization modes and absorption coefficient on self-focusing. The final results show good enhancement of laser propagation through collisionless plasma medium.
{"title":"Dominance of polarization modes and absorption on self-focusing of laser beams in collisionless magnetized plasma","authors":"B. D. Vhanmore, S. P. Rajmane, S. B. Sadale, S. D. Patil, H. M. Shinde, R. J. Kamble, M. V. Takale","doi":"10.1142/s0218863524500085","DOIUrl":"https://doi.org/10.1142/s0218863524500085","url":null,"abstract":"<p>This work investigates the polarization modes i.e., Extraordinary (E-mode) and Ordinary (O-mode) on self-focusing of higher-order mode of elegant Hermite-cosh-Gaussian (EHChG) laser beams within collisionless magnetized plasma medium. In this study, the authors have taken transverse electromagnetic (<span><math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mstyle><mtext mathvariant=\"normal\">T</mtext></mstyle><mi>E</mi><mi>M</mi></math></span><span></span>) mode with mode indices (0, 4) and explored. The ponderomotive force is primarily responsible for the dielectric constant’s nonlinearity in this context. Also, WKB and paraxial approximations via the parabolic wave equation approach are used to establish the general form of differential equations for beam-width parameters in both transverse dimensions of the beam. In this paper, the authors have theoretically investigated the dominance of polarization modes and absorption coefficient on self-focusing. The final results show good enhancement of laser propagation through collisionless plasma medium.</p>","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140826882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-24DOI: 10.1142/s0218863524500103
R. Shahin, D. A. Nuzhdin, A. P. Savikin, S. V. Kurashkin
A theoretical model for determine the optimal focusing parameter for second harmonic generation (SHG) process in a polycrystalline nonlinear medium has been constructed. Theoretical calculations were confirmed by an experiment to obtain SHG at a wavelength of 968nm in a zinc selenide polycrystal using a thulium laser.
{"title":"Influence of the focusing parameter on the SHG efficiency at a wavelength of 968 nm in a ZnSe polycrystal","authors":"R. Shahin, D. A. Nuzhdin, A. P. Savikin, S. V. Kurashkin","doi":"10.1142/s0218863524500103","DOIUrl":"https://doi.org/10.1142/s0218863524500103","url":null,"abstract":"<p>A theoretical model for determine the optimal focusing parameter for second harmonic generation (SHG) process in a polycrystalline nonlinear medium has been constructed. Theoretical calculations were confirmed by an experiment to obtain SHG at a wavelength of 968<span><math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mspace width=\".17em\"></mspace></math></span><span></span>nm in a zinc selenide polycrystal using a thulium laser.</p>","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140799813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-10DOI: 10.1142/s0218863523400167
Mohsen Jemai, Nouha Mastour, Said Ridene
{"title":"Linear and nonlinear electric and magneto-optical absorption coefficients and relative refractive index changes in W<sub>x</sub>Mo<sub>1-x</sub>S<sub>2</sub> Monolayer: Role of Tungsten contents","authors":"Mohsen Jemai, Nouha Mastour, Said Ridene","doi":"10.1142/s0218863523400167","DOIUrl":"https://doi.org/10.1142/s0218863523400167","url":null,"abstract":"","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135191152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-02DOI: 10.1142/s021886352350087x
Souleymanou Abbagari, Alphonse Houwe, Lanre Akinyemi, Mehmet Senol, Thomas Bouetou Bouetou
In this work, investigation of the W-chirped solitons and modulation instability are addressed in nonlinear optic fibers where cubic-quintic and parabolic law parameters are used. For this reason, the modified cubic-quintic complex Ginzburg–Landau equation with parabolic law nonlinearity is employed. Using the sub-ODE method, the chirp component and combined chirped soliton solutions, including rational soliton solutions, are obtained. Using specific parameters of the nonlinear structure, one can identify dark and bright solitons. For a suitable constant parameter of the chirp component, the W-chirped bright as well as the combined bright-dark solitons are displayed via the 3D plots. The linear stability analysis of the plane wave is used to derive an expression of the modulation instability spectrum that is employed to show the effects of the nonlinear parameters in normal and anomalous dispersion regimes. It is pointed out that both cubic and quintic parameters can enlarge or reduce the bandwidth of the modulation instability. Through the numerical simulation of the continuous wave, it becomes apparent that for suitable optical fiber parameter values, modulated wave objects are formed to exhibit mild oscillations. For specific wavenumber excitation, another modulated wave object is depicted to show how the unstable mode can switch to the stable mode for the long-time evolution of the continuous wave. The obtained results could certainly open a new future for signal treatment in optical fiber, where parabolic law is considered.
{"title":"W-chirped solitons and modulated waves patterns in parabolic law medium with anti-cubic nonlinearity","authors":"Souleymanou Abbagari, Alphonse Houwe, Lanre Akinyemi, Mehmet Senol, Thomas Bouetou Bouetou","doi":"10.1142/s021886352350087x","DOIUrl":"https://doi.org/10.1142/s021886352350087x","url":null,"abstract":"In this work, investigation of the W-chirped solitons and modulation instability are addressed in nonlinear optic fibers where cubic-quintic and parabolic law parameters are used. For this reason, the modified cubic-quintic complex Ginzburg–Landau equation with parabolic law nonlinearity is employed. Using the sub-ODE method, the chirp component and combined chirped soliton solutions, including rational soliton solutions, are obtained. Using specific parameters of the nonlinear structure, one can identify dark and bright solitons. For a suitable constant parameter of the chirp component, the W-chirped bright as well as the combined bright-dark solitons are displayed via the 3D plots. The linear stability analysis of the plane wave is used to derive an expression of the modulation instability spectrum that is employed to show the effects of the nonlinear parameters in normal and anomalous dispersion regimes. It is pointed out that both cubic and quintic parameters can enlarge or reduce the bandwidth of the modulation instability. Through the numerical simulation of the continuous wave, it becomes apparent that for suitable optical fiber parameter values, modulated wave objects are formed to exhibit mild oscillations. For specific wavenumber excitation, another modulated wave object is depicted to show how the unstable mode can switch to the stable mode for the long-time evolution of the continuous wave. The obtained results could certainly open a new future for signal treatment in optical fiber, where parabolic law is considered.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135874436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-02DOI: 10.1142/s0218863523500868
E. Ramya, Dushyant Kushavah, D. Narayana Rao, Dong Xiang
Silver (Ag)-doped and un-doped Zinc sulfide (ZnS) nanostructures (NSs) with different concentrations (ZnS: Ag 1%, 3%, 5%, 10%) were prepared by using the chemical method at room temperature. Doping of Ag into ZnS nanostructures modified its optical properties. The size and crystallinity of stabilized ZnS:Ag nanostructures are confirmed with SEM (Scanning electron microscopy) and XRD (X-ray diffraction). The formation of nanostructures is justified by UV-visible absorption spectra. The luminescence intensity of nanostructures has increased drastically at ZnS:Ag-10% and is characterized by a fluorescence spectrometer. The nonlinear optical properties are found by using the Z-scan setup and act as optical limiters. The nonlinear absorption coefficient [Formula: see text] and nonlinear refractive index ([Formula: see text] are in the range of 10[Formula: see text][Formula: see text]cm/W and 10[Formula: see text][Formula: see text]cm 2 /W, respectively. The optical limiting threshold value is 0.11 J/cm 2 . These nanostructures can be used as optical limiters.
{"title":"Optical properties of silver-doped ZnS nanostructures","authors":"E. Ramya, Dushyant Kushavah, D. Narayana Rao, Dong Xiang","doi":"10.1142/s0218863523500868","DOIUrl":"https://doi.org/10.1142/s0218863523500868","url":null,"abstract":"Silver (Ag)-doped and un-doped Zinc sulfide (ZnS) nanostructures (NSs) with different concentrations (ZnS: Ag 1%, 3%, 5%, 10%) were prepared by using the chemical method at room temperature. Doping of Ag into ZnS nanostructures modified its optical properties. The size and crystallinity of stabilized ZnS:Ag nanostructures are confirmed with SEM (Scanning electron microscopy) and XRD (X-ray diffraction). The formation of nanostructures is justified by UV-visible absorption spectra. The luminescence intensity of nanostructures has increased drastically at ZnS:Ag-10% and is characterized by a fluorescence spectrometer. The nonlinear optical properties are found by using the Z-scan setup and act as optical limiters. The nonlinear absorption coefficient [Formula: see text] and nonlinear refractive index ([Formula: see text] are in the range of 10[Formula: see text][Formula: see text]cm/W and 10[Formula: see text][Formula: see text]cm 2 /W, respectively. The optical limiting threshold value is 0.11 J/cm 2 . These nanostructures can be used as optical limiters.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135874435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1142/s0218863523400131
Zhaoru Xie, Jingxian Chen, Jie Huang, Lili Tao, Junshan He
{"title":"Preparation of large-area uniform PdSe<sub>2</sub> film and its application in ultrafast fiber laser","authors":"Zhaoru Xie, Jingxian Chen, Jie Huang, Lili Tao, Junshan He","doi":"10.1142/s0218863523400131","DOIUrl":"https://doi.org/10.1142/s0218863523400131","url":null,"abstract":"","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135221060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1142/s0218863523500893
Mohammad Reza Alizadeh, Saeed Olyaee, Mahmood Seifouri
{"title":"Designing an ultra-compact SOI waveguide with a high nonlinear coefficient for generating optical frequency combs and demultiplexing combs","authors":"Mohammad Reza Alizadeh, Saeed Olyaee, Mahmood Seifouri","doi":"10.1142/s0218863523500893","DOIUrl":"https://doi.org/10.1142/s0218863523500893","url":null,"abstract":"","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135220871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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