Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

doi:10.1088/1674-1056/24/9/094214

中国物理B ›› 2015, Vol. 24 ›› Issue (9): 94214-094214.doi: 10.1088/1674-1056/24/9/094214

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

叶寒^a, 张金倩楠^a, 俞重远^a, 王东林^b, 陈智辉^c

a State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;
b Theoretical Condensed Matter Physics and Computational Materials Physics Laboratory, School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China;
c Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China

收稿日期:2015-01-22 修回日期:2015-04-01 出版日期:2015-09-05 发布日期:2015-09-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61372037 and 61307069), Beijing Excellent Ph. D. Thesis Guidance Foundation, China (Grant No. 20131001301), and the Natural Science Foundation of Shanxi Province, China (Grant No. 2013021017-3).

Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

Ye Han (叶寒)^a, Zhang Jin-Qian-Nan (张金倩楠)^a, Yu Zhong-Yuan (俞重远)^a, Wang Dong-Lin (王东林)^b, Chen Zhi-Hui (陈智辉)^c

a State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;
b Theoretical Condensed Matter Physics and Computational Materials Physics Laboratory, School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China;
c Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China

Received:2015-01-22 Revised:2015-04-01 Online:2015-09-05 Published:2015-09-05
Contact: Ye Han E-mail:Han_ye@bupt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61372037 and 61307069), Beijing Excellent Ph. D. Thesis Guidance Foundation, China (Grant No. 20131001301), and the Natural Science Foundation of Shanxi Province, China (Grant No. 2013021017-3).

摘要/Abstract

摘要： We propose a novel two-dimensional photonic crystal structure consisting of two line defect waveguides and a cavity to realize mode conversion based on the coupling effect. The W1/cavity/W2 structure breaks the spatial symmetry and successfully converts the even (odd) mode to the odd (even) mode in the W2 waveguide during the forward (backward) transmission. When considering the incidence of only the even mode, the optical diode effect emerges and achieves approximate 35 dB unidirectionality at the resonant frequency. Moreover, owing to the narrow bandpass feature and the flexibility of the tuning cavity, utilization of the proposed structure as a wavelength filter is demonstrated in a device with a Y-branch splitter. Here, we provide a heuristic design for a mode converter, optical diode, and wavelength filter derived from the coupling effect between a cavity and adjacent waveguides, and expect that the proposed structure can be applied as a building block in future all-optical integrated circuits.

关键词: mode conversion, optical diode, photonic crystal

Abstract: We propose a novel two-dimensional photonic crystal structure consisting of two line defect waveguides and a cavity to realize mode conversion based on the coupling effect. The W1/cavity/W2 structure breaks the spatial symmetry and successfully converts the even (odd) mode to the odd (even) mode in the W2 waveguide during the forward (backward) transmission. When considering the incidence of only the even mode, the optical diode effect emerges and achieves approximate 35 dB unidirectionality at the resonant frequency. Moreover, owing to the narrow bandpass feature and the flexibility of the tuning cavity, utilization of the proposed structure as a wavelength filter is demonstrated in a device with a Y-branch splitter. Here, we provide a heuristic design for a mode converter, optical diode, and wavelength filter derived from the coupling effect between a cavity and adjacent waveguides, and expect that the proposed structure can be applied as a building block in future all-optical integrated circuits.

Key words: mode conversion, optical diode, photonic crystal

中图分类号: (Optical waveguides and couplers)

42.79.Gn

42.79.Ta (Optical computers, logic elements, interconnects, switches; neural networks) 42.82.-m (Integrated optics)

叶寒, 张金倩楠, 俞重远, 王东林, 陈智辉. Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity[J]. 中国物理B, 2015, 24(9): 94214-094214.

Ye Han (叶寒), Zhang Jin-Qian-Nan (张金倩楠), Yu Zhong-Yuan (俞重远), Wang Dong-Lin (王东林), Chen Zhi-Hui (陈智辉). Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity[J]. Chin. Phys. B, 2015, 24(9): 94214-094214.

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Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

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