Cargando…
Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light
Due to its time-reversal nature, optical phase conjugation generates a monochromatic light wave which retraces its propagation paths. Here, we demonstrate the regeneration of a subwavelength optical focus by phase conjugation. Monochromatic light from a subwavelength source is scattered by random na...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5278350/ https://www.ncbi.nlm.nih.gov/pubmed/28134267 http://dx.doi.org/10.1038/srep41384 |
_version_ | 1782502631247183872 |
---|---|
author | Park, Jongchan Park, Chunghyun Lee, KyeoReh Cho, Yong-Hoon Park, YongKeun |
author_facet | Park, Jongchan Park, Chunghyun Lee, KyeoReh Cho, Yong-Hoon Park, YongKeun |
author_sort | Park, Jongchan |
collection | PubMed |
description | Due to its time-reversal nature, optical phase conjugation generates a monochromatic light wave which retraces its propagation paths. Here, we demonstrate the regeneration of a subwavelength optical focus by phase conjugation. Monochromatic light from a subwavelength source is scattered by random nanoparticles, and the scattered light is phase conjugated at the far-field region by coupling its wavefront into a single-mode optical reflector using a spatial light modulator. Then the conjugated beam retraces its propagation paths and forms a refocus on the source at the subwavelength scale. This is the first direct experimental realisation of subwavelength focusing beyond the diffraction limit with far-field time reversal in the optical domain. |
format | Online Article Text |
id | pubmed-5278350 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-52783502017-02-03 Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light Park, Jongchan Park, Chunghyun Lee, KyeoReh Cho, Yong-Hoon Park, YongKeun Sci Rep Article Due to its time-reversal nature, optical phase conjugation generates a monochromatic light wave which retraces its propagation paths. Here, we demonstrate the regeneration of a subwavelength optical focus by phase conjugation. Monochromatic light from a subwavelength source is scattered by random nanoparticles, and the scattered light is phase conjugated at the far-field region by coupling its wavefront into a single-mode optical reflector using a spatial light modulator. Then the conjugated beam retraces its propagation paths and forms a refocus on the source at the subwavelength scale. This is the first direct experimental realisation of subwavelength focusing beyond the diffraction limit with far-field time reversal in the optical domain. Nature Publishing Group 2017-01-30 /pmc/articles/PMC5278350/ /pubmed/28134267 http://dx.doi.org/10.1038/srep41384 Text en Copyright © 2017, The Author(s) 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 Park, Jongchan Park, Chunghyun Lee, KyeoReh Cho, Yong-Hoon Park, YongKeun Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light |
title | Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light |
title_full | Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light |
title_fullStr | Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light |
title_full_unstemmed | Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light |
title_short | Time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light |
title_sort | time-reversing a monochromatic subwavelength optical focus by optical phase conjugation of multiply-scattered light |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5278350/ https://www.ncbi.nlm.nih.gov/pubmed/28134267 http://dx.doi.org/10.1038/srep41384 |
work_keys_str_mv | AT parkjongchan timereversingamonochromaticsubwavelengthopticalfocusbyopticalphaseconjugationofmultiplyscatteredlight AT parkchunghyun timereversingamonochromaticsubwavelengthopticalfocusbyopticalphaseconjugationofmultiplyscatteredlight AT leekyeoreh timereversingamonochromaticsubwavelengthopticalfocusbyopticalphaseconjugationofmultiplyscatteredlight AT choyonghoon timereversingamonochromaticsubwavelengthopticalfocusbyopticalphaseconjugationofmultiplyscatteredlight AT parkyongkeun timereversingamonochromaticsubwavelengthopticalfocusbyopticalphaseconjugationofmultiplyscatteredlight |