Optical properties of the two-port resonant tunneling filters in two-dimensional photonic crystal slabs |
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Authors: | Ren Cheng Cheng Li-Feng Kang Feng Gan Lin Zhang Dao-Zhong Li Zhi-Yuan |
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Institution: | a School of Opto-Electronic Information Science and Technology, Yantai University, Yantai 264005, China;b Wenjing College, Yantai University, Yantai 264005, China;c Optical Physics Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract: | We have designed and fabricated two types of two-port resonant tunneling filters with a triangular air-hole lattice in two-dimensional photonic crystal slabs. In order to improve the filtering efficiency, a feedback method is introduced by closing the waveguide. It is found that the relative position between the closed waveguide boundary and the resonator has an important impact on the dropping efficiency. Based on our analyses, two different types of filters are designed. The transmission spectra and scattering-light far-field patterns are measured, which agree well with theoretical prediction. In addition, the resonant filters are highly sensitive to the size of the resonant cavities, which are useful for practical applications. |
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Keywords: | photonic crystal slabs filter finite-difference time-domain method |
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