Multiphoton absorption with Bessel Gaussian beams.
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| Title: | Multiphoton absorption with Bessel Gaussian beams. |
|---|---|
| Authors: | Kessi, Ferhat1 (AUTHOR) ferhat.kessi@univ-bejaia.dz |
| Source: | International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics. 12/30/2025, Vol. 39 Issue 32, p1-15. 15p. |
| Subjects: | Multiphoton absorption, Bessel beams, Light transmission, Nonlinear optical materials, Two-photon absorbing materials, Nonlinear optics |
| Abstract: | This study investigates multiphoton absorption in thin, homogeneous nonlinear materials using Gauss–Bessel beams as the incident laser source. Multiphoton absorption processes are crucial for advanced photonic applications including nonlinear microscopy, optical limiting and photodynamic therapy, yet theoretical frameworks for structured beams remain limited. We derive an analytical expression for the normalized optical transmittance for arbitrary order n of nonlinearity under the weak nonlinearity approximation. Numerical simulations focusing on two-photon absorption at 800 nm wavelength reveal the unique characteristics of Gauss–Bessel beams in nonlinear interactions. Our simulations investigate Rayleigh lengths ranging from 0.407 to 3.979 mm, demonstrating that the valley width increases by approximately a factor of 10 across this range. Our results demonstrate that these beams maintain consistent maximum absorption of approximately 0.28 across various Rayleigh parameter values, indicating sustained high nonlinear interaction efficiency over extended distances. This constant absorption efficiency contrasts markedly with conventional Gaussian beams, which exhibit decreasing valley depth for larger Rayleigh lengths. This property, combined with a controllable interaction region width, offers significant advantages over conventional Gaussian beams in nonlinear optics applications. The extended depth of focus and uniform nonlinear response of Gauss–Bessel beams suggest improved robustness and flexibility in optical devices, reducing alignment sensitivity and increasing working distances in nonlinear setups. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 190435181 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Multiphoton absorption with Bessel Gaussian beams. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kessi%2C+Ferhat%22">Kessi, Ferhat</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ferhat.kessi@univ-bejaia.dz</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Modern+Physics+B%3A+Condensed+Matter+Physics%3B+Statistical+Physics%3B+Applied+Physics%22">International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics</searchLink>. 12/30/2025, Vol. 39 Issue 32, p1-15. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Multiphoton+absorption%22">Multiphoton absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Bessel+beams%22">Bessel beams</searchLink><br /><searchLink fieldCode="DE" term="%22Light+transmission%22">Light transmission</searchLink><br /><searchLink fieldCode="DE" term="%22Nonlinear+optical+materials%22">Nonlinear optical materials</searchLink><br /><searchLink fieldCode="DE" term="%22Two-photon+absorbing+materials%22">Two-photon absorbing materials</searchLink><br /><searchLink fieldCode="DE" term="%22Nonlinear+optics%22">Nonlinear optics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study investigates multiphoton absorption in thin, homogeneous nonlinear materials using Gauss–Bessel beams as the incident laser source. Multiphoton absorption processes are crucial for advanced photonic applications including nonlinear microscopy, optical limiting and photodynamic therapy, yet theoretical frameworks for structured beams remain limited. We derive an analytical expression for the normalized optical transmittance for arbitrary order n of nonlinearity under the weak nonlinearity approximation. Numerical simulations focusing on two-photon absorption at 800 nm wavelength reveal the unique characteristics of Gauss–Bessel beams in nonlinear interactions. Our simulations investigate Rayleigh lengths ranging from 0.407 to 3.979 mm, demonstrating that the valley width increases by approximately a factor of 10 across this range. Our results demonstrate that these beams maintain consistent maximum absorption of approximately 0.28 across various Rayleigh parameter values, indicating sustained high nonlinear interaction efficiency over extended distances. This constant absorption efficiency contrasts markedly with conventional Gaussian beams, which exhibit decreasing valley depth for larger Rayleigh lengths. This property, combined with a controllable interaction region width, offers significant advantages over conventional Gaussian beams in nonlinear optics applications. The extended depth of focus and uniform nonlinear response of Gauss–Bessel beams suggest improved robustness and flexibility in optical devices, reducing alignment sensitivity and increasing working distances in nonlinear setups. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1142/S0217979225502868 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 1 Subjects: – SubjectFull: Multiphoton absorption Type: general – SubjectFull: Bessel beams Type: general – SubjectFull: Light transmission Type: general – SubjectFull: Nonlinear optical materials Type: general – SubjectFull: Two-photon absorbing materials Type: general – SubjectFull: Nonlinear optics Type: general Titles: – TitleFull: Multiphoton absorption with Bessel Gaussian beams. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kessi, Ferhat IsPartOfRelationships: – BibEntity: Dates: – D: 30 M: 12 Text: 12/30/2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 02179792 Numbering: – Type: volume Value: 39 – Type: issue Value: 32 Titles: – TitleFull: International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics Type: main |
| ResultId | 1 |
