Indexed by:Journal paper Journal:Optics Express Affiliation of Author(s):光电学院，国家光电研究中心 Place of Publication:美国 Discipline:Engineering Funded by:自然科学基金 Document Type:J Volume:23 Issue:23 Page Number:30259-30269 Key Words:无 DOI number:10.1364/OE.23.030259 Date of Publication:2015-09-17 Teaching and Research Group:c716 Abstract:We present a Fourier finite element modeling of light emission of dipolar emitters coupled to infinitely long waveguides. Due to the translational symmetry, the three-dimensional (3D) coupled waveguide-emitter system can be decomposed into a series of independent 2D problems (2.5D), which reduces the computational cost. Moreover, the reduced 2D problems can be extremely accurate, compared to its 3D counterpart. Our method can precisely quantify the total emission rates, as well as the fraction of emission rates into different modal channels for waveguides with arbitrary cross-sections. We compare our method with dyadic Green’s function for the light emission in single mode metallic nanowire, which yields an excellent agreement. This method is applied in multi-mode waveguides, as well as multi-core waveguides. We further show that our method has the full capability of including dipole orientations, as illustrated via a rotating dipole, which leads to unidirectional excitation of guide modes. The 2.5D Finite Element Method (FEM) approach proposed here can be applied for various waveguides, thus it is useful to interface single-photon single-emitter in nano-structures, as well as for other scenarios involving coupled waveguide-emitters. Note:无 Links to published journals:https://doi.org/10.1364/OE.23.030259