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Li P, Guo X, Qi S, Han L, Zhang Y, Liu S, Li Y, Zhao J. Creation of independently controllable multiple focal spots from segmented Pancharatnam-Berry phases. Sci Rep 2018; 8:9831. [PMID: 29959390 PMCID: PMC6026170 DOI: 10.1038/s41598-018-28186-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 06/18/2018] [Indexed: 11/22/2022] Open
Abstract
Recently, based on space-variant Pancharatnam-Berry (PB) phases, various flat devices allowing abrupt changes of beam parameters have been predicted and demonstrated to implement intriguing manipulation on spin states in three dimensions, including the efficient generation of vector beams, spin Hall effect of light and light-guiding confinement, and so on. Here, we report on the construction of independently controllable multiple focal spots with different inhomogeneous polarization states by utilizing segmented PB phases. Combining the phase shift approach with PB phases, we engineer fan-shaped segmented PB phases and encode them onto two spin components that compose a hybrid polarized vector beam in a modified common-path interferometer system. Experimental results demonstrate that the fan-shaped segmented PB phase enables the flexible manipulation of focal number, array structure and polarization state of each focal spot. Furthermore, we demonstrate that this fan-shaped approach enables to flexibly tailor the polarization state and the spin angular momentum distribution of a tightly focused field, which have potential applications in optical manipulation, tailored optical response and imaging etc.
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Affiliation(s)
- Peng Li
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China.
| | - Xuyue Guo
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Shuxia Qi
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Lei Han
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Yi Zhang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Sheng Liu
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Yu Li
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Jianlin Zhao
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical information Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710129, China.
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Zhou J, Qian H, Hu G, Luo H, Wen S, Liu Z. Broadband Photonic Spin Hall Meta-Lens. ACS NANO 2018; 12:82-88. [PMID: 29211443 DOI: 10.1021/acsnano.7b07379] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Meta-lens represents a promising solution for optical communications and information processing owing to its miniaturization capability and desirable optical properties. Here, spin Hall meta-lens is demonstrated to manipulate photonic spin-dependent splitting induced by spin-orbital interaction in transverse and longitudinal directions simultaneously at visible wavelengths, with low dispersion and more than 90% diffraction efficiency. The broadband dielectric spin Hall meta-lens is achieved by integrating two geometric phase lenses with different functionalities into one single dynamic phase lens, which manifests the ultracompact, portable, and polarization-dependent features. The broadband spin Hall meta-lens may find important applications in imaging, sensing, and multifunctional spin photonics devices.
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Affiliation(s)
- Junxiao Zhou
- Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University , Changsha 410082, China
| | - Haoliang Qian
- Department of Electrical and Computer Engineering, University of California, San Diego , 9500 Gilman Drive., La Jolla, California 92093, United States
| | - Guangwei Hu
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, Singapore 117576, Singapore
| | - Hailu Luo
- Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University , Changsha 410082, China
| | - Shuangchun Wen
- Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University , Changsha 410082, China
| | - Zhaowei Liu
- Department of Electrical and Computer Engineering, University of California, San Diego , 9500 Gilman Drive., La Jolla, California 92093, United States
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Zhang C, Zhang W, Li F, Wang J, Teng S. Talbot effect of quasi-periodic grating. APPLIED OPTICS 2013; 52:5083-5087. [PMID: 23872752 DOI: 10.1364/ao.52.005083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 06/17/2013] [Indexed: 06/02/2023]
Abstract
Theoretic and experimental studies of the Talbot effect of quasi-periodic gratings are performed in this paper. The diffractions of periodic and quasi-periodic square aperture arrays in Fresnel fields are analyzed according to the scalar diffraction theory. The expressions of the diffraction intensities of two types of quasi-periodic gratings are deduced. Talbot images of the quasi-periodic gratings are predicted to appear at multiple certain distances. The quasi-periodic square aperture arrays are produced with the aid of a liquid crystal light modulator, and the self-images of the quasi-periodic gratings are measured successfully in the experiment. This study indicates that even a structure in short-range disorder may take on the self-imaging effect in a Fresnel field.
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Affiliation(s)
- Chong Zhang
- The College of Physics and Electronics, Shandong Provincial Key Laboratory of Optics and Photonic Device, Shandong Normal University, Jinan, Shandong 250014, China
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Murakami N, Hamaguchi S, Sakamoto M, Fukumoto R, Ise A, Oka K, Baba N, Tamura M. Design and laboratory demonstration of an achromatic vector vortex coronagraph. OPTICS EXPRESS 2013; 21:7400-7410. [PMID: 23546123 DOI: 10.1364/oe.21.007400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A vector vortex coronagraph (VVC) is one of promising means for imaging extremely faint objects around bright stars such as exoplanets. We present a design of an achromatic VVC, in which an axially-symmetric half-wave plate (AHP) is placed between crossed polarization filters (circular polarizer and analyzer). The circular polarizer and the analyzer are both composed of a polarizer and a quarter-wave plate (QWP). We demonstrate, via Jones calculus and Fourier analysis, that the achromatic stellar elimination can theoretically be realized by optimal polarization filters, even when chromatic AHP and QWPs are used. We carried out laboratory demonstrations of the designed VVC using a photonic-crystal AHP. As a result, we observed achromatic coronagraphic performance, a light suppression level of 7 × 10(-5), over a wavelength from 543 nm to 633 nm.
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Affiliation(s)
- Naoshi Murakami
- Division of Applied Physics, Faculty of Engineering, Hokkaido University, Kita-13, Nishi-8, Sapporo, Hokkaido 060-8628, Japan.
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van Dijk T, Schouten HF, Visser TD. Geometric interpretation of the Pancharatnam connection and non-cyclic polarization changes. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2010; 27:1972-1976. [PMID: 20808404 DOI: 10.1364/josaa.27.001972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
If the state of polarization of a monochromatic light beam is changed in a cyclical manner, the beam acquires-in addition to the usual dynamic phase-a geometric phase. This geometric or Pancharatnam-Berry phase equals half the solid angle of the contour traced out on the Poincaré sphere. We show that such a geometric interpretation also exists for the Pancharatnam connection, the criterion according to which two beams with different polarization states are said to be in phase. This interpretation offers what is to our knowledge a new and intuitive method to calculate the geometric phase that accompanies non-cyclic polarization changes.
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Affiliation(s)
- Thomas van Dijk
- Department of Physics and Astronomy, and Laser Centre, VU University, De Boelelaan 1081,1081 HV Amsterdam, The Netherlands
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Mawet D, Serabyn E, Liewer K, Hanot C, McEldowney S, Shemo D, O'Brien N. Optical Vectorial Vortex Coronagraphs using Liquid Crystal Polymers: theory, manufacturing and laboratory demonstration. OPTICS EXPRESS 2009; 17:1902-1918. [PMID: 19189021 DOI: 10.1364/oe.17.001902] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this paper, after briefly reviewing the theory of vectorial vortices, we describe our technological approach to generating the necessary phase helix, and report results obtained with the first optical vectorial vortex coronagraph (OVVC) in the laboratory. To implement the geometrical phase ramp, we make use of Liquid Crystal Polymers (LCP), which we believe to be the most efficient technological path to quickly synthesize optical vectorial vortices of virtually any topological charge. With the first prototype device of topological charge 2, a maximum peak-to-peak attenuation of 1.4x10(-2) and a residual light level of 3x10(-5) at an angular separation of 3.5 lambda/d (at which point our current noise floor is reached) have been obtained at a wavelength of 1.55 microm. These results demonstrate the validity of using space-variant birefringence distributions to generate a new family of coronagraphs usable in natural unpolarized light, opening a path to high performance coronagraphs that are achromatic and have low-sensitivity to low-order wavefront aberrations.
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Affiliation(s)
- D Mawet
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
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