Tunable metamaterial-based silicon waveguide

被引:43
作者
Han, Yuxi [1 ]
Lin, Jie [1 ]
Lin, Yu-Sheng [1 ]
机构
[1] Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangzhou 510006, Peoples R China
关键词
VARIABLE OPTICAL ATTENUATOR; NEGATIVE REFRACTION; SCATTERING; RESONANCE; LIGHT;
D O I
10.1364/OL.414129
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A tunable metamaterial (MM)-based silicon (Si) waveguide is presented that is composed of an MM nanodisk array on a Si-on insulator substrate. A significant modulation efficiency of transmission intensity could be realized by elevating individually or simultaneously the column number of MM nanodisks. For a convenient description, an MM-based Si waveguide with one, two, three, four, and five columns of MM nanodisks are denoted as MM-1, MM-2, MM-3, MM-4, and MM-5, respectively. Transmission intensity of MM-based Si waveguides could be switched between on and off states by driving different columns of MM nanodisks on the Si waveguide surface. Transmission intensities could be attenuated from 100% to 56%, 24%, 6%, 1%, and 0% for MM-1, MM-2, MM-3, MM-4, and MM-5, respectively, at the wavelength of 1.525 mu m. Furthermore, the MM-5 device is exposed to an ambient environment with different refraction indices. It exhibits a linear relationship of resonance dips and refraction indexes. The proposed design of the MM-based Si waveguide provides potential possibilities in an optical switch, variable optical attenuator, and sensor applications. (C) 2020 Optical Society of America
引用
收藏
页码:6619 / 6622
页数:4
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