TY - JOUR
T1 - Controlling propagation and coupling of waveguide modes using phase-gradient metasurfaces
AU - Li, Zhaoyi
AU - Kim, Myoung Hwan
AU - Wang, Cheng
AU - Han, Zhaohong
AU - Shrestha, Sajan
AU - Overvig, Adam Christopher
AU - Lu, Ming
AU - Stein, Aaron
AU - Agarwal, Anuradha Murthy
AU - Lončar, Marko
AU - Yu, Nanfang
N1 - Publisher Copyright:
© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85017506127&partnerID=8YFLogxK
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U2 - 10.1038/nnano.2017.50
DO - 10.1038/nnano.2017.50
M3 - Article
C2 - 28416817
AN - SCOPUS:85017506127
SN - 1748-3387
VL - 12
SP - 675
EP - 683
JO - Nature Nanotechnology
JF - Nature Nanotechnology
IS - 7
ER -