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

被引：29

作者：

Li, Zhaoyi ^{[1
]}

Kim, Myoung-Hwan ^{[1
,2
]}

Wang, Cheng ^{[3
]}

Han, Zhaohong ^{[4
,5
]}

Shrestha, Sajan ^{[1
]}

Overvig, Adam Christopher ^{[1
]}

Lu, Ming ^{[6
]}

Stein, Aaron ^{[6
]}

Agarwal, Anuradha Murthy ^{[4
,5
]}

Loncar, Marko ^{[3
]}

Yu, Nanfang ^{[1
]}

机构：

[1] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA

[2] Univ Texas Rio Grande Valley, Dept Phys, Brownsville, TX 78520 USA

[3] Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[4] MIT, Microphoton Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[5] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[6] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

NATURE NANOTECHNOLOGY | 2017年 / 12卷 / 07期

基金：

美国国家科学基金会;

关键词：

ON-CHIP; SILICON; POLARIZATION; CONVERTER; CONVERSION; PHOTONICS; COMPACT; OPTICS;

D O I：

10.1038/NNANO.2017.50

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：675 / +

页数：10