Polarization independent high transmission large numerical aperture laser beam focusing and deflection by dielectric Huygens' metasurfaces

OPTICS COMMUNICATIONS

卷:401

Article

Ozdemir, Aytekin^1,2  Hayran, Zeki²  Takashima, Yuzuru¹  Kurt, Hamza² 

[1] Univ Arizona, Coll Opt Sci, 1630 E Univ Blvd, Tucson, AZ 85721 USA

[2] TOBB Univ Econ & Technol, Dept Elect & Elect Engn, TR-06560 Ankara, Turkey

关键词: Metasurfaces;    Metamaterials;    Phase shift;    Subwavelength structures;   

DOI  :  10.1016/j.optcom.2017.05.031

来源: Elsevier

【 摘 要 】

In this letter, we propose all-dielectric Huygens' metasurface structures to construct high numerical aperture flat lenses and beam deflecting devices. The designed metasurface consists of two-dimensional array of all dielectric nanodisk resonators with spatially varying radii, thereby introducing judiciously designed phase shift to the propagating light. Owing to the overlap of Mie-type magnetic and electric resonances, high transmission was achieved with rigorous design analysis. The designed flat lenses have numerical aperture value of 0.85 and transmission values around 80%. It also offers easy fabrication and compatibility with available semiconductor technology. This spectrally and physically scalable, versatile design could implement efficient wavefront manipulation or beam shaping for high power laser beams, as well as various optical microscopy applications without requiring plasmonic structures that are susceptible to ohmic loss of metals and sensitive to the polarization of light. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free