Cargando…

Preferential coupling of an incident wave to reflection eigenchannels of disordered media

Light waves incident to a highly scattering medium are incapable of penetrating deep into the medium due to the multiple scattering process. This poses a fundamental limitation to optically imaging, sensing, and manipulating targets embedded in opaque scattering layers such as biological tissues. On...

Descripción completa

Detalles Bibliográficos
Autores principales: Choi, Wonjun, Kim, Moonseok, Kim, Donggyu, Yoon, Changhyeong, Fang-Yen, Christopher, Park, Q-Han, Choi, Wonshik
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4650648/
https://www.ncbi.nlm.nih.gov/pubmed/26078088
http://dx.doi.org/10.1038/srep11393
_version_ 1782401528844255232
author Choi, Wonjun
Kim, Moonseok
Kim, Donggyu
Yoon, Changhyeong
Fang-Yen, Christopher
Park, Q-Han
Choi, Wonshik
author_facet Choi, Wonjun
Kim, Moonseok
Kim, Donggyu
Yoon, Changhyeong
Fang-Yen, Christopher
Park, Q-Han
Choi, Wonshik
author_sort Choi, Wonjun
collection PubMed
description Light waves incident to a highly scattering medium are incapable of penetrating deep into the medium due to the multiple scattering process. This poses a fundamental limitation to optically imaging, sensing, and manipulating targets embedded in opaque scattering layers such as biological tissues. One strategy for mitigating the shallow wave penetration is to exploit eigenchannels with anomalously high transmittance existing in any scattering medium. However, finding such eigenchannels has been a challenging task due to the complexity of disordered media. Moreover, it is even more difficult to identify those eigenchannels from the practically relevant reflection geometry of measurements. In this Letter, we present an iterative wavefront control method that either minimizes or maximizes the total intensity of the reflected waves. We proved that this process led to the preferential coupling of incident wave to either low or high-reflection eigenchannels, and observed either enhanced or reduced wave transmission as a consequence. Since our approach is free from prior characterization measurements such as the recording of transmission matrix, and also able to keep up with sample perturbation, it is readily applicable to in vivo applications. Enhancing light penetration will help improving the working depth of optical sensing and treatment techniques.
format Online
Article
Text
id pubmed-4650648
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-46506482015-11-24 Preferential coupling of an incident wave to reflection eigenchannels of disordered media Choi, Wonjun Kim, Moonseok Kim, Donggyu Yoon, Changhyeong Fang-Yen, Christopher Park, Q-Han Choi, Wonshik Sci Rep Article Light waves incident to a highly scattering medium are incapable of penetrating deep into the medium due to the multiple scattering process. This poses a fundamental limitation to optically imaging, sensing, and manipulating targets embedded in opaque scattering layers such as biological tissues. One strategy for mitigating the shallow wave penetration is to exploit eigenchannels with anomalously high transmittance existing in any scattering medium. However, finding such eigenchannels has been a challenging task due to the complexity of disordered media. Moreover, it is even more difficult to identify those eigenchannels from the practically relevant reflection geometry of measurements. In this Letter, we present an iterative wavefront control method that either minimizes or maximizes the total intensity of the reflected waves. We proved that this process led to the preferential coupling of incident wave to either low or high-reflection eigenchannels, and observed either enhanced or reduced wave transmission as a consequence. Since our approach is free from prior characterization measurements such as the recording of transmission matrix, and also able to keep up with sample perturbation, it is readily applicable to in vivo applications. Enhancing light penetration will help improving the working depth of optical sensing and treatment techniques. Nature Publishing Group 2015-06-16 /pmc/articles/PMC4650648/ /pubmed/26078088 http://dx.doi.org/10.1038/srep11393 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Choi, Wonjun
Kim, Moonseok
Kim, Donggyu
Yoon, Changhyeong
Fang-Yen, Christopher
Park, Q-Han
Choi, Wonshik
Preferential coupling of an incident wave to reflection eigenchannels of disordered media
title Preferential coupling of an incident wave to reflection eigenchannels of disordered media
title_full Preferential coupling of an incident wave to reflection eigenchannels of disordered media
title_fullStr Preferential coupling of an incident wave to reflection eigenchannels of disordered media
title_full_unstemmed Preferential coupling of an incident wave to reflection eigenchannels of disordered media
title_short Preferential coupling of an incident wave to reflection eigenchannels of disordered media
title_sort preferential coupling of an incident wave to reflection eigenchannels of disordered media
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4650648/
https://www.ncbi.nlm.nih.gov/pubmed/26078088
http://dx.doi.org/10.1038/srep11393
work_keys_str_mv AT choiwonjun preferentialcouplingofanincidentwavetoreflectioneigenchannelsofdisorderedmedia
AT kimmoonseok preferentialcouplingofanincidentwavetoreflectioneigenchannelsofdisorderedmedia
AT kimdonggyu preferentialcouplingofanincidentwavetoreflectioneigenchannelsofdisorderedmedia
AT yoonchanghyeong preferentialcouplingofanincidentwavetoreflectioneigenchannelsofdisorderedmedia
AT fangyenchristopher preferentialcouplingofanincidentwavetoreflectioneigenchannelsofdisorderedmedia
AT parkqhan preferentialcouplingofanincidentwavetoreflectioneigenchannelsofdisorderedmedia
AT choiwonshik preferentialcouplingofanincidentwavetoreflectioneigenchannelsofdisorderedmedia