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Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode

[Image: see text] Microscopic lenses are paramount in solar energy harvesting, optical devices, and imaging technologies. This work reports an extraordinary focusing effect exhibited by a surface nanolens (i.e., with at least one dimension of subwavelength) that is situated in an evanescent field fr...

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Autores principales: Dyett, Brendan, Zhang, Qiming, Xu, Qiwei, Wang, Xihua, Zhang, Xuehua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6276033/
https://www.ncbi.nlm.nih.gov/pubmed/30555903
http://dx.doi.org/10.1021/acscentsci.8b00501
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author Dyett, Brendan
Zhang, Qiming
Xu, Qiwei
Wang, Xihua
Zhang, Xuehua
author_facet Dyett, Brendan
Zhang, Qiming
Xu, Qiwei
Wang, Xihua
Zhang, Xuehua
author_sort Dyett, Brendan
collection PubMed
description [Image: see text] Microscopic lenses are paramount in solar energy harvesting, optical devices, and imaging technologies. This work reports an extraordinary focusing effect exhibited by a surface nanolens (i.e., with at least one dimension of subwavelength) that is situated in an evanescent field from the total internal reflection (TIR) of light illuminated to the supporting substrate above the critical angle. Our measurements show that the position, shape, and size of the surface area with enhanced light intensity are determined by the geometry of the nanolens and the incident angle, in good agreement with simulation results. This strong focusing effect of the surface nanolens is shown to significantly promote the plasmonic effect of deposited gold nanoparticles on the lens surface inlight conversion and to vaporize surrounding water to microbubbles by using low laser power. This work further demonstrates that the light redistribution by the surface nanolens in TIR enables a range of novel applications in selectively local visualization of specimens in fluorescence imaging, optical trapping of colloids from an external flow, and selective materials deposition from photoreactions.
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spelling pubmed-62760332018-12-15 Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode Dyett, Brendan Zhang, Qiming Xu, Qiwei Wang, Xihua Zhang, Xuehua ACS Cent Sci [Image: see text] Microscopic lenses are paramount in solar energy harvesting, optical devices, and imaging technologies. This work reports an extraordinary focusing effect exhibited by a surface nanolens (i.e., with at least one dimension of subwavelength) that is situated in an evanescent field from the total internal reflection (TIR) of light illuminated to the supporting substrate above the critical angle. Our measurements show that the position, shape, and size of the surface area with enhanced light intensity are determined by the geometry of the nanolens and the incident angle, in good agreement with simulation results. This strong focusing effect of the surface nanolens is shown to significantly promote the plasmonic effect of deposited gold nanoparticles on the lens surface inlight conversion and to vaporize surrounding water to microbubbles by using low laser power. This work further demonstrates that the light redistribution by the surface nanolens in TIR enables a range of novel applications in selectively local visualization of specimens in fluorescence imaging, optical trapping of colloids from an external flow, and selective materials deposition from photoreactions. American Chemical Society 2018-10-19 2018-11-28 /pmc/articles/PMC6276033/ /pubmed/30555903 http://dx.doi.org/10.1021/acscentsci.8b00501 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Dyett, Brendan
Zhang, Qiming
Xu, Qiwei
Wang, Xihua
Zhang, Xuehua
Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode
title Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode
title_full Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode
title_fullStr Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode
title_full_unstemmed Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode
title_short Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode
title_sort extraordinary focusing effect of surface nanolenses in total internal reflection mode
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6276033/
https://www.ncbi.nlm.nih.gov/pubmed/30555903
http://dx.doi.org/10.1021/acscentsci.8b00501
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