Hole geometry effect on stop-band characteristics of photonic crystal in Ti-diffused LiNbO₃ waveguide

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• 作者：Quan-Zhou Zhao^a ; ^b ; ^c ; Zi-Bo Zhang^d ; Jia-Qi Xu^a ; ^b ; Wing-Han Wong^a ; ^b ; ^e ; ^{eewhwong@cityu.edu.hk} ; Dao-Yin Yu^a ; ^b ; Edwin Yue-Bun Pun^e ; De-Long Zhang^a ; ^b ; ^e ; ^{dlzhang@tju.edu.cn}
• 关键词：Optical materials ; Etching ; Computer modelling and simulation ; Optical properties
• 刊名：Materials Chemistry and Physics
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：186
• 期：Complete
• 页码：498-504
• 全文大小：3083 K
• 卷排序：186

文摘

Cylindrical hole must be deep enough and a shallow waveguide is required. Increasing hole radius causes blueshift, broadening and edge sharpening of band. Non-cylindrical hole seriously affects gap, location and contrast of stop-band. For cylindrical-conical hybrid hole, cylindrical part determines desired features. A scheme of milling holes at bottom of a trench on waveguide surface is proposed.