Unidirectional and highly dispersive grating emitters for silicon photonic beam steerers

被引：1

作者：

Chen, Fa-lun ^{[1
]}

Yiu, Gow-zin ^{[1
]}

Chang, You-chia ^{[1
]}

机构：

[1] Natl Yang Ming Chiao Tung Univ, Coll Elect & Comp Engn, Dept Photon, Hsinchu 30010, Taiwan

来源：

OPTICS LETTERS | 2024年 / 49卷 / 19期

关键词：

LIGHT WAVE-GUIDE; PHASED-ARRAY;

D O I：

10.1364/OL.533704

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Grating emitters are the key component used in silicon photonic beam steerers to create light emission and allow dispersion-based steering. Conventional grating emitters are inefficient due to bidirectional emission, and their angular dispersion is only on the order of 0.1 degrees/nm. In this paper, we develop unidirectional grating emitters by choosing a top cladding material with a refraction index higher than that of the bottom cladding. The refractive index difference allows the phase-matching condition to be satisfied only for the upward diffraction. We demonstrate experimentally grating emitters with a directionality of 83% and an angular dispersion of 0.79 degrees/nm. These grating emitters have a simple device structure compatible with the standard silicon training, and similar technologies, are reserved.

引用

页码：5383 / 5386

页数：4

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