Apodized Grating Coupler Using Fully-etched Nanostructures

WU Hua; LI Chong; LI Zhiyong; GUO Xia

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Apodized Grating Coupler Using Fully-etched Nanostructures

WU Hua 1 #,LI Chong 2,LI Zhiyong 1,GUO Xia 3 *

1.Beijing University of Technology,College of Electronic Information and Control Engineering, Photonic Device Research Laboratory, Beijing 100124

2.GanNan Normal University,College of Physics and Electronic Information,JiangxiGanzhou 341000

3.State Key Laboratory for Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083

*Correspondence author

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Subject:

Funding: National Natural Science Foundation of China （No.61222501,61335004, 61505003）, Postdoctoral Science Foundation of Beijing Fundaed Project（No.Q6002012201502）, Specialize Research Fund for the Doctoral Program of Higher Education of China（No.20111103110019）

Opened online: 9 December 2015

Accepted by: none

Citation: WU Hua,LI Chong,LI Zhiyong.Apodized Grating Coupler Using Fully-etched Nanostructures[OL]. [ 9 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4666304

A 2-dimensional apodized grating coupler for interfacing between single-mode ?bers and photonic circuits on silicon-on-insulator is demonstrated. The grating coupler with grating grooves are realized by columns of fully etched nanostructures, with the feasibility of digitally tailoring the effective refractive index of each groove in order to obtain the Gaussian-like output diffractive mode in order to enhance the coupling efficiency to the optical fiber. Compared with the uniform grating couplers, the coupling efficiency of the apodized grating couplers increased by 4.3% and 5.7%, respectively, for the nanoholes and nanorectangles as refractive index tuning layer.

Keywords:grating couplers; equivalent refractive index; mode matching; coupling eﬃciency

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