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Dual-Scale Textured Broadband Si-Based Light Absorber

Various antireflective structures and methods are proposed to solve the optical loss of Si-based absorber devices. Dual-scale structures have received more concern from researchers in recent years. In this study, the finite difference time domain (FDTD) method is employed to investigate deeply the d...

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Autores principales: Wen, Zhidong, Cai, Shunshuo, Zhang, Zhe, Xu, Ziye, Song, Qi, Zhang, Kunpeng, Li, Man, Shi, Haiyan, Hou, Yu, Zhang, Zichen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735742/
https://www.ncbi.nlm.nih.gov/pubmed/36500908
http://dx.doi.org/10.3390/nano12234285
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author Wen, Zhidong
Cai, Shunshuo
Zhang, Zhe
Xu, Ziye
Song, Qi
Zhang, Kunpeng
Li, Man
Shi, Haiyan
Hou, Yu
Zhang, Zichen
author_facet Wen, Zhidong
Cai, Shunshuo
Zhang, Zhe
Xu, Ziye
Song, Qi
Zhang, Kunpeng
Li, Man
Shi, Haiyan
Hou, Yu
Zhang, Zichen
author_sort Wen, Zhidong
collection PubMed
description Various antireflective structures and methods are proposed to solve the optical loss of Si-based absorber devices. Dual-scale structures have received more concern from researchers in recent years. In this study, the finite difference time domain (FDTD) method is employed to investigate deeply the dependence of optical response on the geometric shape and size of structures. The micron cone shows lower reflectivity than other micron structures. Additionally, the lowest reflectivity region moves with the increasing height size of the cone structure. We proposed creatively a nanoripple-cone structure that maintains low reflectivity properties under varying incident angles whether in the visible region or the near-infrared region. Furthermore, the lower reflectivity is obtained with increasing micron cone and decreasing nanoripple. Finally, the dual-scale nanoripple-cone is fabricated directly and cost-effectively by a femtosecond laser instead of a two-step texture-on-texture way. The measured result shows that the high absorption above 98% extends to the mid-infrared region. This study provides directions for the fabrication of wideband Si-based absorber devices to reduce reflectivity, which exhibits a wide application potential and promotes the evolution of multi-laser processing.
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spelling pubmed-97357422022-12-11 Dual-Scale Textured Broadband Si-Based Light Absorber Wen, Zhidong Cai, Shunshuo Zhang, Zhe Xu, Ziye Song, Qi Zhang, Kunpeng Li, Man Shi, Haiyan Hou, Yu Zhang, Zichen Nanomaterials (Basel) Article Various antireflective structures and methods are proposed to solve the optical loss of Si-based absorber devices. Dual-scale structures have received more concern from researchers in recent years. In this study, the finite difference time domain (FDTD) method is employed to investigate deeply the dependence of optical response on the geometric shape and size of structures. The micron cone shows lower reflectivity than other micron structures. Additionally, the lowest reflectivity region moves with the increasing height size of the cone structure. We proposed creatively a nanoripple-cone structure that maintains low reflectivity properties under varying incident angles whether in the visible region or the near-infrared region. Furthermore, the lower reflectivity is obtained with increasing micron cone and decreasing nanoripple. Finally, the dual-scale nanoripple-cone is fabricated directly and cost-effectively by a femtosecond laser instead of a two-step texture-on-texture way. The measured result shows that the high absorption above 98% extends to the mid-infrared region. This study provides directions for the fabrication of wideband Si-based absorber devices to reduce reflectivity, which exhibits a wide application potential and promotes the evolution of multi-laser processing. MDPI 2022-12-01 /pmc/articles/PMC9735742/ /pubmed/36500908 http://dx.doi.org/10.3390/nano12234285 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wen, Zhidong
Cai, Shunshuo
Zhang, Zhe
Xu, Ziye
Song, Qi
Zhang, Kunpeng
Li, Man
Shi, Haiyan
Hou, Yu
Zhang, Zichen
Dual-Scale Textured Broadband Si-Based Light Absorber
title Dual-Scale Textured Broadband Si-Based Light Absorber
title_full Dual-Scale Textured Broadband Si-Based Light Absorber
title_fullStr Dual-Scale Textured Broadband Si-Based Light Absorber
title_full_unstemmed Dual-Scale Textured Broadband Si-Based Light Absorber
title_short Dual-Scale Textured Broadband Si-Based Light Absorber
title_sort dual-scale textured broadband si-based light absorber
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735742/
https://www.ncbi.nlm.nih.gov/pubmed/36500908
http://dx.doi.org/10.3390/nano12234285
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