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Experimental evidence of the large photonic band gap in two‐dimensional square‐lattice Al 2 O 3 rods array
Author(s) -
Wang Yong,
Zhang Dengguo,
Xu Shixiang,
Xu Biaogang,
Dong Zheng,
Huang Tan
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30529
Subject(s) - rod , photonic crystal , square lattice , square (algebra) , lattice (music) , photonics , materials science , optoelectronics , optics , condensed matter physics , physics , mathematics , acoustics , geometry , medicine , alternative medicine , pathology , ising model
We report numerical and experimental investigations of the large band gap in a newly designed two‐dimensional square lattice photonic crystals (PCs) that is formed by distributing cylindrical Al 2 O 3 pillars array in contact with air. The band gap of TE mode for the PCs is calculated by plane wave expansion method. The numerical results show that there is a lenient photonic band gap (PBG), which is expressed as normalized frequency range 0.3525–0.4687. To validate the numerical result, we perform the experiments in the microwave regime using an Agilent E8361C vector network analyzer. The measured reflection and transmission characteristics of the PCs sample have shown a large band gap between 8.62 and 11.554 GHz (relative bandwidth is 29.34%), which is corresponding perfectly with the numerical results. At the central frequency of 10 GHz, the isolation of PBG reaches −57.24 dB and about 90% energy is reflected back to the input port. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1347–1350, 2017