eprintid: 10044876
rev_number: 18
eprint_status: archive
userid: 608
dir: disk0/10/04/48/76
datestamp: 2018-03-08 14:11:12
lastmod: 2021-10-09 22:49:38
status_changed: 2018-03-08 14:11:12
type: article
metadata_visibility: show
creators_name: Timbrell, D
creators_name: You, JW
creators_name: Kivshar, YS
creators_name: Panoiu, NC
title: A comparative analysis of surface and bulk contributions to second-harmonic generation in centrosymmetric nanoparticles
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
note: 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.
abstract: Second-harmonic generation (SHG) from nanoparticles made of centrosymmetric materials provides an effective tool to characterize many important properties of photonic structures at the subwavelength scale. Here we study the relative contribution of surface and bulk effects to SHG for plasmonic and dielectric nanostructures made of centrosymmetric materials in both dispersive and non-dispersive regimes. Our calculations of the far-fields generated by the nonlinear surface and bulk currents reveal that the size of the nanoparticle strongly influences the amount and relative contributions of the surface and bulk SHG effects. Importantly, our study reveals that, whereas for plasmonic nanoparticles the surface contribution is always dominant, the bulk and surface SHG effects can become comparable for dielectric nanoparticles, and thus they both should be taken into account when analyzing nonlinear optical properties of all-dielectric nanostructures.
date: 2018-02-26
date_type: published
official_url: http://doi.org/10.1038/s41598-018-21850-8
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
article_type_text: Journal Article
verified: verified_manual
elements_id: 1540183
doi: 10.1038/s41598-018-21850-8
pii: 10.1038/s41598-018-21850-8
lyricists_name: Panoiu, Nicolae-Coriolan
lyricists_name: You, Jianwei
lyricists_id: NPANO59
lyricists_id: JWYOU76
actors_name: Smith, Daniel
actors_id: DSMIT53
actors_role: owner
full_text_status: public
publication: Scientific Reports
volume: 8
article_number: 3586
event_location: England
issn: 2045-2322
citation:        Timbrell, D;    You, JW;    Kivshar, YS;    Panoiu, NC;      (2018)    A comparative analysis of surface and bulk contributions to second-harmonic generation in centrosymmetric nanoparticles.                   Scientific Reports , 8     , Article 3586.  10.1038/s41598-018-21850-8 <https://doi.org/10.1038/s41598-018-21850-8>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10044876/1/s41598-018-21850-8.pdf