摘要
A fundamental 1× 2 beam splitter based on the self-imaging phenomena in multi-mode one-dimensional （1D） photonic crystal （PC） waveguides is presented, and its transmission characteristics are investigated using the finite-difference time-domain method. Calculated results indicate that a high transmittance （〉95%） can be observed within a wide frequency band for the 1×2 beam splitter without complicated structural optimizations. In this letter, a simple and compact 1×4 beam splitter is constructed by combining the fundamental 1×2 beam splitter with the flexible bends of 1D PC waveguides. Such beam splitters can be applied to highly dense photonic integrated circuits.
A fundamental 1× 2 beam splitter based on the self-imaging phenomena in multi-mode one-dimensional （1D） photonic crystal （PC） waveguides is presented, and its transmission characteristics are investigated using the finite-difference time-domain method. Calculated results indicate that a high transmittance （〉95%） can be observed within a wide frequency band for the 1×2 beam splitter without complicated structural optimizations. In this letter, a simple and compact 1×4 beam splitter is constructed by combining the fundamental 1×2 beam splitter with the flexible bends of 1D PC waveguides. Such beam splitters can be applied to highly dense photonic integrated circuits.
基金
supported by the National Natural Science Foundation of China(No.61007027)
the Fundamental Research Funds for Central Universities,China
