Cargando…
Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses
Using a pump–probe technique, the reflectivity of a silicon grating surface irradiated with intense femtosecond (fs) laser pulses was measured as a function of the incidence angle and the delay time between pulses. After irradiating the surface with an intense s-polarized, 400 nm, 300 fs laser pulse...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10611748/ https://www.ncbi.nlm.nih.gov/pubmed/37891205 http://dx.doi.org/10.1038/s41598-023-45968-6 |
_version_ | 1785128550612860928 |
---|---|
author | Tateda, Mika Iida, Yuto Miyaji, Godai |
author_facet | Tateda, Mika Iida, Yuto Miyaji, Godai |
author_sort | Tateda, Mika |
collection | PubMed |
description | Using a pump–probe technique, the reflectivity of a silicon grating surface irradiated with intense femtosecond (fs) laser pulses was measured as a function of the incidence angle and the delay time between pulses. After irradiating the surface with an intense s-polarized, 400 nm, 300 fs laser pulse, the reflectivity measured with a weak p-polarized, 800 nm, 100 fs laser pulse exhibited an abrupt decrease for an incidence angle of ~ 24°. The depth of the dip was greatest for a delay time of 0.6–10 ps, for which the reflectivity around the dip was highest. The surface was also found to be ablated most strongly for the conditions causing the deepest dip for a delay time of 5–10 ps. Surface plasmon polaritons (SPPs) on silicon metallized by the intense pulse are resonantly excited by the subsequent pulse, and the strong coherent coupling between the subsequent pulse and SPPs excited on the molten Si surface produced by high-density free electrons induces strong surface ablation due to the intense plasmonic near-field. The results clearly show that fs pulses can be used to significantly modulate the nature of nonmetallic materials and could possibly serve as a basic tool for the excitation of SPPs on nonmetallic materials using ultrafast laser–matter interactions. |
format | Online Article Text |
id | pubmed-10611748 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-106117482023-10-29 Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses Tateda, Mika Iida, Yuto Miyaji, Godai Sci Rep Article Using a pump–probe technique, the reflectivity of a silicon grating surface irradiated with intense femtosecond (fs) laser pulses was measured as a function of the incidence angle and the delay time between pulses. After irradiating the surface with an intense s-polarized, 400 nm, 300 fs laser pulse, the reflectivity measured with a weak p-polarized, 800 nm, 100 fs laser pulse exhibited an abrupt decrease for an incidence angle of ~ 24°. The depth of the dip was greatest for a delay time of 0.6–10 ps, for which the reflectivity around the dip was highest. The surface was also found to be ablated most strongly for the conditions causing the deepest dip for a delay time of 5–10 ps. Surface plasmon polaritons (SPPs) on silicon metallized by the intense pulse are resonantly excited by the subsequent pulse, and the strong coherent coupling between the subsequent pulse and SPPs excited on the molten Si surface produced by high-density free electrons induces strong surface ablation due to the intense plasmonic near-field. The results clearly show that fs pulses can be used to significantly modulate the nature of nonmetallic materials and could possibly serve as a basic tool for the excitation of SPPs on nonmetallic materials using ultrafast laser–matter interactions. Nature Publishing Group UK 2023-10-27 /pmc/articles/PMC10611748/ /pubmed/37891205 http://dx.doi.org/10.1038/s41598-023-45968-6 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Tateda, Mika Iida, Yuto Miyaji, Godai Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses |
title | Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses |
title_full | Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses |
title_fullStr | Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses |
title_full_unstemmed | Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses |
title_short | Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses |
title_sort | enhancement of plasmonic coupling on si metallized with intense femtosecond laser pulses |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10611748/ https://www.ncbi.nlm.nih.gov/pubmed/37891205 http://dx.doi.org/10.1038/s41598-023-45968-6 |
work_keys_str_mv | AT tatedamika enhancementofplasmoniccouplingonsimetallizedwithintensefemtosecondlaserpulses AT iidayuto enhancementofplasmoniccouplingonsimetallizedwithintensefemtosecondlaserpulses AT miyajigodai enhancementofplasmoniccouplingonsimetallizedwithintensefemtosecondlaserpulses |