Chinese Optics Letters, 2008, 6 (6): 431, Published Online: Jun. 10, 2008
High efficiency filtering using two-dimensional photonic crystal coupled cavity structures 
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光子晶体耦合腔 滤波 数值模拟 120.2440 Filters 000.4430 Numerical approximation and analysis 130.3120 Integrated optics devices
Abstract
Transmission spectra of coupled cavity structures (CCSs) in two-dimensional (2D) photonic crystals (PCs) are investigated using a coupled mode theory, and an optical filter based on CCS is proposed. The performance of the filter is investigated using finite-difference time-domain (FDTD) method, and the results show that within a very short coupling distance of about 3\lambda, where \lambda is the wavelength of signal in vacuum, the incident signals with different frequencies are separated into different channels with a contrast ratio of 20 dB. The advantages of this kind of filter are small size and easily tunable operation frequencies.
Huibo Wang, Jinsheng Wang, Wenhui Li, Weiqiang Ding. High efficiency filtering using two-dimensional photonic crystal coupled cavity structures[J]. Chinese Optics Letters, 2008, 6(6): 431.
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