论文部分内容阅读
对一维对称光子晶体中的色散介质采用洛仑兹振子模型,通过考虑色散介质层两侧的边界条件,得到了表征色散介质层的转移矩阵。对线性层及色散δ层均采用传输矩阵的方法,研究了一维含色散介质的光子晶体微腔中的简正耦合模。由于光与色散介质的相互作用,纵腔模将分裂成简正耦合模。通过改变色散介质的相关参数,详细研究了简正耦合模频率的移动、均匀展宽效应和失谐效应。发现两个简正的耦合模的频率间距主要依赖于振子的耦合强度,与约化的振子的HWHM线宽无关。失谐效应则会使其中的一个峰降低,而另一个峰相对拉高,这一现象可以通过Fabry-P啨rot腔得到很好的解释。
The Lorentz oscillator model is adopted for the dispersion medium in one-dimensional symmetric photonic crystals. The transfer matrix for the dispersion medium layer is obtained by considering the boundary conditions on both sides of the dispersion medium layer. Both the linear and the dispersive δ layers adopt the transfer matrix method to study the simple coupled modes in one-dimensional photonic crystal microcavities containing dispersive medium. Due to the interaction of light and dispersive medium, the cavity mode will be split into a simple coupled mode. By changing the relevant parameters of dispersive medium, the movement of simple coupled mode frequency, the uniform broadening effect and the detuning effect are studied in detail. It is found that the frequency spacing of the two normal modes of coupling depends mainly on the coupling strength of the vibrator, independent of the HWHM linewidth of the reduced oscillator. The detuning effect reduces one of the peaks and the other peaks relatively higher, a phenomenon well explained by the Fabry-Pärot cavity.