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Title: Controlling propagation and coupling of waveguide modes using phase-gradient metasurfaces

Here, research on two-dimensional designer optical structures, or metasurfaces, has mainly focused on controlling the wavefronts of light propagating in free space. Here, we show that gradient metasurface structures consisting of phased arrays of plasmonic or dielectric nanoantennas can be used to control guided waves via strong optical scattering at subwavelength intervals. Based on this design principle, we experimentally demonstrate waveguide mode converters, polarization rotators and waveguide devices supporting asymmetric optical power transmission. We also demonstrate all-dielectric on-chip polarization rotators based on phased arrays of Mie resonators with negligible insertion losses. Our gradient metasurfaces can enable small-footprint, broadband and low-loss photonic integrated devices.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [1] ;  [5] ; ORCiD logo [5] ;  [4] ;  [3] ;  [1]
  1. Columbia Univ., New York, NY (United States)
  2. Columbia Univ., New York, NY (United States); The Univ. of Texas Rio Grande Valley, Brownsville, TX (United States)
  3. Harvard Univ., Cambridge, MA (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-114798-2017-JA
Journal ID: ISSN 1748-3387; KC0403020; TRN: US1800358
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Nature Nanotechnology
Additional Journal Information:
Journal Volume: 12; Journal Issue: 7; Journal ID: ISSN 1748-3387
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; metasurface; Waveguide Modes; plasmonics; Center for Functional Nanomaterials
OSTI Identifier:
1412777