Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrations
The second harmonic (SH) of an axicon generated Bessel-Gauss beam is created through the nonlinear interaction of photons with a crystal, resulting in the energy doubling of the output photons. In this work, we show experimentally that in addition to frequency doubling, the SH of Bessel-Gauss beams...
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-01-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.013012 |
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| author | Tianhong Wang Finn Buldt Pascal Bassène Saad Bin Ali Reza Edwin Fohtung Thomas A. Searles Chiu Tai Law Moussa N'Gom |
| author_facet | Tianhong Wang Finn Buldt Pascal Bassène Saad Bin Ali Reza Edwin Fohtung Thomas A. Searles Chiu Tai Law Moussa N'Gom |
| author_sort | Tianhong Wang |
| collection | DOAJ |
| description | The second harmonic (SH) of an axicon generated Bessel-Gauss beam is created through the nonlinear interaction of photons with a crystal, resulting in the energy doubling of the output photons. In this work, we show experimentally that in addition to frequency doubling, the SH of Bessel-Gauss beams under asymmetric aberrations from an elliptic axicon exhibit intriguing beam formation. Particularly, the central region of the SH beam profile is composed of two central spots of various geometries surrounded by nested ellipses; one of which is the configuration of two central gamma dots with similar radius knotted by nested ellipses for a zeroth-order Bessel-Gauss pump. These SH beams consistently maintain their spatial profile throughout propagation, reminiscing the behavior of screw dislocations in wave patterns. Our numerical simulations produce beam dynamics consistent with that of experiments and further implicate the remarkable interweaving of bright spots with dark vortices. This is especially noticeable when the beams dynamically oscillate along the optical axis, resulting in the genesis of spatially polarized beams with a knotted framework. The insights gained from our study establish a novel paradigm for exploring interactions of Bessel-like beams with vortex dynamics. This, in turn, has the potential to spark innovations in optical applications, fostering new methodologies to harness and manipulate complex light structures. Our experimental findings could spur new methods of generating logical states of light and new opportunities for material processing control. |
| format | Article |
| id | doaj-art-972ae2f121d24c27a697d2397401b345 |
| institution | Kabale University |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-972ae2f121d24c27a697d2397401b3452025-01-06T18:45:33ZengAmerican Physical SocietyPhysical Review Research2643-15642025-01-017101301210.1103/PhysRevResearch.7.013012Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrationsTianhong WangFinn BuldtPascal BassèneSaad Bin Ali RezaEdwin FohtungThomas A. SearlesChiu Tai LawMoussa N'GomThe second harmonic (SH) of an axicon generated Bessel-Gauss beam is created through the nonlinear interaction of photons with a crystal, resulting in the energy doubling of the output photons. In this work, we show experimentally that in addition to frequency doubling, the SH of Bessel-Gauss beams under asymmetric aberrations from an elliptic axicon exhibit intriguing beam formation. Particularly, the central region of the SH beam profile is composed of two central spots of various geometries surrounded by nested ellipses; one of which is the configuration of two central gamma dots with similar radius knotted by nested ellipses for a zeroth-order Bessel-Gauss pump. These SH beams consistently maintain their spatial profile throughout propagation, reminiscing the behavior of screw dislocations in wave patterns. Our numerical simulations produce beam dynamics consistent with that of experiments and further implicate the remarkable interweaving of bright spots with dark vortices. This is especially noticeable when the beams dynamically oscillate along the optical axis, resulting in the genesis of spatially polarized beams with a knotted framework. The insights gained from our study establish a novel paradigm for exploring interactions of Bessel-like beams with vortex dynamics. This, in turn, has the potential to spark innovations in optical applications, fostering new methodologies to harness and manipulate complex light structures. Our experimental findings could spur new methods of generating logical states of light and new opportunities for material processing control.http://doi.org/10.1103/PhysRevResearch.7.013012 |
| spellingShingle | Tianhong Wang Finn Buldt Pascal Bassène Saad Bin Ali Reza Edwin Fohtung Thomas A. Searles Chiu Tai Law Moussa N'Gom Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrations Physical Review Research |
| title | Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrations |
| title_full | Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrations |
| title_fullStr | Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrations |
| title_full_unstemmed | Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrations |
| title_short | Second harmonic Bessel-Gauss beam shaping with elliptic axicon aberrations |
| title_sort | second harmonic bessel gauss beam shaping with elliptic axicon aberrations |
| url | http://doi.org/10.1103/PhysRevResearch.7.013012 |
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