Numerical characterization of nanopillar photonic crystal waveguides and directional couplers

We numerically characterize a novel type of a photonic crystal waveguide, which consists of several rows of periodically arranged dielectric cylinders. In such a nanopillar photonic crystal waveguide, light confinement is due to the total internal reflection. A nanopillar waveguide is a multimode waveguide, where the number of modes is equal to the number of rows building the waveguide. The strong coupling between individual waveguides leads to the proposal of an ultrashort directional coupler based on nanopillar waveguides. We present a systematic analysis of the dispersion and transmission efficiency of nanopillar photonic crystal waveguides and directional couplers. Plane wave expansion and finite difference time domain methods were used to characterize numerically nanopillar photonic crystal structures both in two- and three-dimensional spaces.

[1]  P. Yang,et al.  Single Nanowire Lasers , 2001 .

[2]  Alfred Forchel,et al.  Photonic crystal waveguide directional couplers as wavelength selective optical filters , 2004 .

[3]  C. G. Someda,et al.  Coupling and decoupling of electromagnetic waves in parallel 2D photonic crystal waveguides , 2002 .

[4]  J. Marti,et al.  Ultrashort 2-D photonic crystal directional couplers , 2003, IEEE Photonics Technology Letters.

[5]  Steven G. Johnson,et al.  Block-iterative frequency-domain methods for Maxwell's equations in a planewave basis. , 2001, Optics express.

[6]  M. Qiu,et al.  Contra-directional coupling between two-dimensional photonic crystal waveguides , 2003 .

[7]  Leon Poladian,et al.  Antisymmetric grating coupler: experimental results. , 2003, Applied optics.

[8]  Guido Perrone,et al.  Design and feasibility analysis of an innovative integrated grating-assisted add-drop multiplexer , 2001 .

[9]  Yoshimasa Sugimoto,et al.  Low propagation loss of 0.76 dB/mm in GaAs-based single-line-defect two-dimensional photonic crystal slab waveguides up to 1 cm in length. , 2004, Optics express.

[10]  Photonic-band-gap properties of two-dimensional lattices of Si nanopillars , 2002 .

[11]  Yoshimasa Sugimoto,et al.  Design, fabrication, and characterization of coupling-strength-controlled directional coupler based on two-dimensional photonic-crystal slab waveguides , 2003 .

[12]  Shanhui Fan,et al.  Guided and defect modes in periodic dielectric waveguides , 1995 .

[13]  Andrei Lavrinenko,et al.  Nanopillars photonic crystal waveguides. , 2004, Optics express.

[14]  A. Forchel,et al.  Optical confinement in CdTe-based photonic dots , 2002 .

[15]  A. Forchel,et al.  Photonic defect states in chains of coupled microresonators , 2001 .

[16]  Gaoxin Qiu,et al.  Complete two-dimensional bandgap of photonic crystals of a rectangular Bravais lattice , 2003 .

[17]  L. Coldren,et al.  Diode Lasers and Photonic Integrated Circuits , 1995 .

[18]  M. Notomi,et al.  Waveguides, resonators and their coupled elements in photonic crystal slabs. , 2004, Optics express.

[19]  H. Chong,et al.  Comprehensive FDTD modelling of photonic crystal waveguide components. , 2004, Optics express.