Effect of double negative medium on the transmission spectra of one-dimensional photonic crystal quantum well
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摘要: 为设计高品质的光学滤波器和光学开关，用传输矩阵法研究双负介质对一维光子晶体量子阱（AB）m（CBAABC）n（BA）m透射谱的影响，结果表明：当C层为双正介质时，光量子阱透射谱中出现2n+1条窄透射峰，当C层为双负介质时，呈现简并现象，光量子阱透射峰中仅出现2n-1条窄透射峰；当C层双负介质折射率负值增大时，光量子阱透射谱向禁带中心两侧移动，同时透射峰的品质因子快速提高；当C层双负介质光学厚度负值减小时，光量子阱透射谱向禁带中心靠拢，同时透射峰的品质因子迅速提高；光量子阱透射品质因子对双负介质光学厚度的响应灵敏度高于对折射率负值的响应。双负介质对光量子阱透射谱特性的影响规律，可为光子晶体理论研究及新型量子光学器件设计提供参考。Abstract: To design high-quality optical filters and optical switches,the effect of double negative medium on the transmission spectrum of one-dimensional photonic crystal quantum well (AB)m(CBAABC)n(BA)m was studied with transfer matrix method. The results show that when layer C is double positive medium, there are 2n+1 narrow transmission peaks in the spectrum. While layer C is negative medium, there are only 2n-1 narrow transmission peaks in the spectrum, presenting degeneration. When the negative value of refractive index of double negative medium in layer C increases, the spectrum moves towards two sides of the forbidden band center and the quality factor of the transmission peaks improves quickly. When the negative value of optical thickness of double negative medium in layer C decreases, the spectrum draws close to the center of the forbidden band and the quality factor of the transmission peaks also speedily improves. The effect of the transmission quality factor of optical crystal quantum well on the optical thickness of double negative medium is more sensitive than the one on the negative value of refractive index. The law, the effect of the double negative medium on the characteristics of transmission spectrum in the optical crystal quantum well, can provide reference for optical crystal theoretical research and designing new quantum optical devices.
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