| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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High-efficiency ultra-fast all-optical photonic crystal diode based on the lateral-coupled nonlinear elliptical defect |
| Daxing Li(李大星)1,2,3, Kaizhu Liu(刘凯柱)4, Chunlong Yu(余春龙)1,2,3, Kuo Zhang(张括)1,2,3, Yueqin Liu(刘跃钦)1,2,3, and Shuai Feng(冯帅)1,2,3,† |
1 School of Science, Minzu University of China, Beijing 100081, China;
2 Optoelectronics Research Center, Minzu University of China, Beijing 100081, China;
3 Engineering Research Center of Photonic Design Software, Ministry of Education, Beijing 100081, China;
4 School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China |
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Abstract An all-optical Fano-like diode featuring a nonlinear lateral elliptical micro-cavity and a reflecting column in the photonic crystal waveguide is proposed. The asymmetric micro-cavity is constructed by removing one rod and changing the shape of the lateral rod from a circle to an ellipse. A reflecting pillar is also introduced into the waveguide to construct an F-P cavity with the elliptical defect and enhance the asymmetric transmission for the incident light wave transmitting rightwards and leftwards, respectively. By designing the size of the ellipse and optimizing a reflecting rod at a suitable position, a maximum forward light transmittance of -1.14 dB and a minimum backward transmittance of -57.66 dB are achieved at the working wavelength of 1550.47 nm. The corresponding response time is about 10 ps when the intensity of the pump light beam resonant at 637 nm is 3.97 W/μm2.
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Received: 01 August 2023
Revised: 24 September 2023
Accepted manuscript online: 07 October 2023
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PACS:
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42.70.Qs
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(Photonic bandgap materials)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12274478 and 61775244) and the National Key Research and Development Program of China (Grant Nos. 2021YFB2800604 and 2021YFB2800302). |
Corresponding Authors:
Shuai Feng
E-mail: fengshuai75@163.com
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Cite this article:
Daxing Li(李大星), Kaizhu Liu(刘凯柱), Chunlong Yu(余春龙), Kuo Zhang(张括),Yueqin Liu(刘跃钦), and Shuai Feng(冯帅) High-efficiency ultra-fast all-optical photonic crystal diode based on the lateral-coupled nonlinear elliptical defect 2024 Chin. Phys. B 33 034215
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