光在一维金属/电介质光子晶体中的传播特性  

Light Transfer Characteristics in 1-D Metal-dielectric Photonic Crystal

作　　者：邵伟伟[1] 杨大鹏[2] 刘相舜[1] 张天浩[1] 

机构地区：[1]南开大学光子学中心、弱光非线性光子学材料先进技术及制备教育部实验室、天津市信息光子材料与技术重点实验室,天津300071 [2]华北水利水电学院物理实验教研室,河南郑州450011

出　　处：《南开大学学报（自然科学版）》2010年第3期76-80,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(60678026,10874094)

摘　　要：用转移矩阵方法从理论上研究了光波在一维金属/电介质光子晶体中的传播特性.通常可见光在金属中的趋肤深度只有十几nm,所以在几十nm以上厚度的金属中是不能传播的.但可见光在由金属和电介质构成的一维光子晶体中传播时,即使金属的总厚度远远超过趋肤深度,仍然能够通过.单层金属膜的厚度越大,透射率越小,透射谱线的峰宽越窄.随电介质层的厚度增大,光子带隙向长波长移动.结构的周期数越大,透射率越小.但周期数并不能影响带隙的位置和宽度.The light transmission properties of one-dimensional metal-dielectric photonic crystals are studied theoretically by transfer-matrix method. Usually, a metal film whose thickness is in excess of dozens of nanometer is fairly opaque to visible light. However, the transmission of visible light is quite large when propagate in a metal-dielectric photonic crystals whose total thickness of metal film far exceeds skin depths. With the increase of thickness of a single metal layer, the transmission of light decreases and the width of the transmission spectrum becomes narrow. As the thickness of a single dielectric layer increasing, the photonic bad gap shifts to long wavelength. The larger period number, the lower transmission of light. But the period number has no effect on the position and the width of photonic bad gap.

关 键 词：光子晶体 转移矩阵方法 光子带隙 

分 类 号：O734[理学—晶体学]