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...

Descripción completa

Detalles Bibliográficos
Autores principales: Tateda, Mika, Iida, Yuto, Miyaji, Godai
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