Planar binary-phase lens for super-oscillatory optical hollow needles

Abstract Optical hollow beams are suitable for materials processing, optical micromanipulation, microscopy, and optical lithography. However, conventional optical hollow beams are diffraction-limited. The generation of sub-wavelength optical hollow beams using a high numerical aperture objective len...

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Autores principales:	Gang Chen, Zhixiang Wu, Anping Yu, Kun Zhang, Jing Wu, Luru Dai, Zhongquan Wen, Yinghu He, Zhihai Zhang, Senlin Jiang, Changtao Wang, Xiangang Luo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/908e9b470190461c97ed68841c96ab03
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spelling	oai:doaj.org-article:908e9b470190461c97ed68841c96ab032021-12-02T16:06:45ZPlanar binary-phase lens for super-oscillatory optical hollow needles10.1038/s41598-017-05060-22045-2322https://doaj.org/article/908e9b470190461c97ed68841c96ab032017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05060-2https://doaj.org/toc/2045-2322Abstract Optical hollow beams are suitable for materials processing, optical micromanipulation, microscopy, and optical lithography. However, conventional optical hollow beams are diffraction-limited. The generation of sub-wavelength optical hollow beams using a high numerical aperture objective lens and pupil filters has been theoretically proposed. Although sub-diffraction hollow spot has been reported, nondiffracting hollow beams of sub-diffraction transverse dimensions have not yet been experimentally demonstrated. Here, a planar lens based on binary-phase modulation is proposed to overcome these constraints. The lens has an ultra-long focal length of 300λ. An azimuthally polarized optical hollow needle is experimentally demonstrated with a super-oscillatory transverse size (less than 0.38λ/NA) of 0.34λ to 0.42λ, where λ is the working wavelength and NA is the lens numerical aperture, and a large depth of focus of 6.5λ. For a sub-diffraction transverse size of 0.34λ to 0.52λ, the nondiffracting propagation distance of the proposed optical hollow needle is greater than 10λ. Numerical simulation also reveals a good penetrability of the proposed optical hollow needle at an air-water interface, where the needle propagates through water with a doubled propagation distance and without loss of its super-oscillatory property. The proposed lens is suitable for nanofabrication, optical nanomanipulation, super-resolution imaging, and nanolithography applications.Gang ChenZhixiang WuAnping YuKun ZhangJing WuLuru DaiZhongquan WenYinghu HeZhihai ZhangSenlin JiangChangtao WangXiangang LuoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gang Chen Zhixiang Wu Anping Yu Kun Zhang Jing Wu Luru Dai Zhongquan Wen Yinghu He Zhihai Zhang Senlin Jiang Changtao Wang Xiangang Luo Planar binary-phase lens for super-oscillatory optical hollow needles
description	Abstract Optical hollow beams are suitable for materials processing, optical micromanipulation, microscopy, and optical lithography. However, conventional optical hollow beams are diffraction-limited. The generation of sub-wavelength optical hollow beams using a high numerical aperture objective lens and pupil filters has been theoretically proposed. Although sub-diffraction hollow spot has been reported, nondiffracting hollow beams of sub-diffraction transverse dimensions have not yet been experimentally demonstrated. Here, a planar lens based on binary-phase modulation is proposed to overcome these constraints. The lens has an ultra-long focal length of 300λ. An azimuthally polarized optical hollow needle is experimentally demonstrated with a super-oscillatory transverse size (less than 0.38λ/NA) of 0.34λ to 0.42λ, where λ is the working wavelength and NA is the lens numerical aperture, and a large depth of focus of 6.5λ. For a sub-diffraction transverse size of 0.34λ to 0.52λ, the nondiffracting propagation distance of the proposed optical hollow needle is greater than 10λ. Numerical simulation also reveals a good penetrability of the proposed optical hollow needle at an air-water interface, where the needle propagates through water with a doubled propagation distance and without loss of its super-oscillatory property. The proposed lens is suitable for nanofabrication, optical nanomanipulation, super-resolution imaging, and nanolithography applications.
format	article
author	Gang Chen Zhixiang Wu Anping Yu Kun Zhang Jing Wu Luru Dai Zhongquan Wen Yinghu He Zhihai Zhang Senlin Jiang Changtao Wang Xiangang Luo
author_facet	Gang Chen Zhixiang Wu Anping Yu Kun Zhang Jing Wu Luru Dai Zhongquan Wen Yinghu He Zhihai Zhang Senlin Jiang Changtao Wang Xiangang Luo
author_sort	Gang Chen
title	Planar binary-phase lens for super-oscillatory optical hollow needles
title_short	Planar binary-phase lens for super-oscillatory optical hollow needles
title_full	Planar binary-phase lens for super-oscillatory optical hollow needles
title_fullStr	Planar binary-phase lens for super-oscillatory optical hollow needles
title_full_unstemmed	Planar binary-phase lens for super-oscillatory optical hollow needles
title_sort	planar binary-phase lens for super-oscillatory optical hollow needles
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/908e9b470190461c97ed68841c96ab03
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_version_	1718384855478173696

Planar binary-phase lens for super-oscillatory optical hollow needles

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