| A completely open cavity realized with photonic crystal wedges |
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| 作者姓名： | 何赛灵 阮智超 |
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| 作者单位： | Centre for Optical and Electromagnetic Research，Joint Research Centre of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University，Zhejiang University Hangzhou 310027，China，Division of Electromagnetic Theory，Alfven Laboratory，Royal Institute of Technology，S-100 44，Stockholm，Sweden，Centre for Optical and Electromagnetic Research，Joint Research Centre of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University，Zhejiang University Hangzhou 310027，China |
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| 基金项目： | Project supported by the National Basic Research Program (973) of China (No. 2004CB719801), and the National Natural Science Foun-dation of China (Nos. 90101024 and 60378037) |
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| 摘 要： | A left-handed (LH) material (also called a nega-tive refraction index material) exhibiting a negativerefraction index due to simultaneously negative per-meability and permittivity, was first introduced byVeselago in 1967 (Veselago, 1968). Negative refrac-tion has recently attracted much attention in thephysics and electrical community engineering due toits potential impacts and applications (Shelby et al.,2001; Pendry, 2000). Negative refraction can also beachieved in some negative refractio…
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| 关 键 词： | 空穴 光子学 负折射系数 左手定理 电磁学 |
A completely open cavity realized with photonic crystal wedges |
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| He Sai-ling,Ruan Zhi-chao.A completely open cavity realized with photonic crystal wedges[J].Journal of Zhejiang University Science,2005,6(5):355-357. |
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| Authors: | He Sai-ling Ruan Zhi-chao |
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| Institution: | (1) Centre for Optical and Electromagnetic Research, Joint Research Centre of Photonics of the Royal Institute of Technology (Sweden), Stockholm, Sweden;(2) Zhejiang University, Zhejiang University, 310027 Hangzhou, China;(3) Division of Electromagnetic Theory, Alfven Laboratory, Royal Institute of Technology, S-100 44 Stockholm, Sweden |
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| Abstract: | A completely open cavity, which is formed by three 60-degree wedges of a photonic crystal with negative effective index, is introduced. Such a realizable design for a completely open cavity (i.e., without any reflective wall in the radial direction) is the first of its kind ever been reported. Due to the negative effective refraction index of the photonic crystal and the high transmission at the photonic crystal/air interfaces, a closed path with zero optical path is formed for the resonance. The present open cavity is very suitable for use as a biosensor as it has large air wedges into which a liquid measurand can flow easily. |
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| Keywords: | Completely open cavity Photonic crystal Negative refraction index Left-handed Resonator |
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