单负材料一维光子晶体的透射谱特性

利用传输矩阵法研究了单负材料一维光子晶体(AB)m(ADBDB)n(AB)mA的透射谱,发现:透射谱中出现2个共振隧穿模,其位置和间距可由周期数m或n,以及介质层厚度d调节控制。改变m,会出现2个恒定间距的共振隧穿模;改变dA,共振隧穿模间距增大,且当dA≥25mm时,间距增大加剧;改变n,共振隧穿模逐渐趋于简并,当n≥6时,两隧穿模合二为一;改变dD,两共振隧穿模亦逐渐趋于简并,当dD≥20mm时,两隧穿模亦合二为一。这些特性可为利用光子晶体设计可调性高品质单通道、双通道滤波器提供参考。

Transmission Spectrum Characteristics of Single-negative Materials with One-dimensional Photonic Crystal

By means of the transfer matrix method, transmission spectra characteristics of single-negative materials with one-dimensional photonic crystal (AB)m(ADBDB)n(AB)mA was researched, and the results showed that the location and space of two resonant tunneling modes can be adjustably controlled by the number of period m or n, and the thickness d of medium layers. Changing m, two resonant tunneling modes of constant space show up; changing dA, the space of them increases, and the space increases more severely when dA≥25 mm;changing n, the two resonant tunneling modes tend to degenerate and become one unit when n≥6; changing dD, they tend to degenerate and become one unit when dD≥20 mm. These characteristics can provide references for designing the adjustable high-quality single-channel and double-channel filters.