Gradient-index antireflective subwavelength structures for planar waveguide facets

被引：57

作者：

Schmid, J. H. ^{[1
]}

Cheben, P. ^{[1
]}

Janz, S. ^{[1
]}

Lapointe, J. ^{[1
]}

Post, E. ^{[1
]}

Xu, D.-X. ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

来源：

OPTICS LETTERS | 2007年 / 32卷 / 13期

关键词：

D O I：

10.1364/OL.32.001794

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate the use of subwavelength gratings etched into the facets of silicon-on-insulator ridge waveguides as a means of reducing facet reflectivity by the gradient-index effect. Reflectivities as low as 2.0% and 2.4% for the fundamental TE and TM modes, respectively, are demonstrated experimentally for light of 1.55 mu m wavelength, in agreement with both effective medium theory and finite-difference time domain calculations. Simulations show that facet reflectivites can be further reduced to less than 1% by increasing the grating modulation depth. (c) 2007 Optical Society of America.

引用

页码：1794 / 1796

页数：3

共 9 条

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