Density of optical states in rolled-up photonic crystals and quasi crystals

We describe the local density of optical states (LDOS) and the density of optical states (DOS) in three dimensional (3D) finite size rolled-up photonic crystals and quasi crystals calculated using optimized code based on finite difference time domain (FDTD) techniques. Because the Bloch–Floquet theorem is not used in these calculations, the code can be applied to any dielectric structures that lack discrete translational symmetry, making it ideal for experimentally fabricated structures that are finite in size and include defects. Our software can be used for either LDOS or DOS calculations, is parallelized using standard message passing interface (MPI) protocols, and is freely available at www.fpspackage.com.本研究阐述了基于优化后的时域有限差分（Finite Difference Time Domain, FDTD）技术编写的计算代码，针对三维（3D）有限尺寸卷起式光子晶体与准晶体，开展了光学态局域密度（Local Density of Optical States, LDOS）及光学态密度（Density of Optical States, DOS）的相关计算工作。由于此类计算未使用布洛赫-弗洛凯（Bloch–Floquet）定理，因此该代码可应用于任何不具备离散平移对称性的介电结构，尤其适用于实验制备的有限尺寸含缺陷结构。本软件既可用于光学态局域密度计算，也可用于光学态密度计算，采用标准消息传递接口（MPI）协议实现并行化，并可在www.fpspackage.com免费获取。