Generation of equal-intensity coherent optical beams by binary geometrical phase on metasurface

Journal Article · Mon Jun 27 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4955034· OSTI ID:22590618

Wang, Zheng-Han; Jiang, Shang-Chi; Xiong, Xiang; Peng, Ru-Wen; Wang, Mu ^[1]

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1. National Laboratory of Solid State Microstructures and School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093 (China)

We report here the design and realization of a broadband, equal-intensity optical beam splitter with a dispersion-free binary geometric phase on a metasurface with unit cell consisting of two mirror-symmetric elements. We demonstrate experimentally that two identical beams can be efficiently generated with incidence of any polarization. The efficiency of the device reaches 80% at 1120 nm and keeps larger than 70% in the range of 1000–1400 nm. We suggest that this approach for generating identical, coherent beams have wide applications in diffraction optics and in entangled photon light source for quantum communication.

• OSTI ID: 22590618
• Journal Information: Applied Physics Letters, Vol. 108, Issue 26; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
DESIGN
DIFFRACTION
DISPERSIONS
EFFICIENCY
EQUIPMENT
GEOMETRY
LIGHT SOURCES
MIRRORS
OPTICS
PHOTONS
POLARIZATION
SYMMETRY