可实现奇数通道滤波功能的光量子阱透射谱

Transmission Spectrum of Photonic Crystal Quantum-well Sturcture for Realizable Odd-passage Filter

针对光子晶体(AB)m(CD)n(BA)m模型,选择适当的结构参数,通过传输矩阵法对其透射谱进行计算模拟发现,在归一化中心频率0.5(ωa/2πc)处,当光子晶体(CD)n的导带处于光子晶体(AB)m(BA)m的禁带中,且两者均以中心频率处为对称中心时,构成镜像对称的光子晶体量子阱结构。在光量子阱透射谱的中心频率处及对称的两侧,分布着具有规律的奇数局域共振峰,出现明显的量子化效应,透射峰数目和位置都可以通过光子晶体(CD)n的重复周期数n来调节,这一现象可用于设计可调性奇数通道滤波器。

To the structure of photonic crystal （AB） m （CD） n （BA） m, when choosing proper structural parameters, its transmission spectra is calculated and simulated by means of the transfer matrix method. At the central frequency of the reduced units 0.5 （ωa/2πc）, when the transmission band of photonic crystal （CD）n is completely inside the band gap of photonic crystal （AB）m （BA）m, both sharing the same central frequency as their symmetry centers, mirror symmetrical photonic quantum well is formed. At both sides of the central frequencies in the reduced units in the transmission spectra of the well, there are odd resonance-peaks, which symmetrically distributed and orderly localized, and form an obvious quantization effect for transmission-peak. The number and the location of the transmission peaks can be modulated by changing the number of period n of photonic crystal （CD）n. This could be used for designing the adjustably odd-passage filters.