Enhanced gain measurement at mode singularities in InP-based photonic crystal waveguides

Erratum: Slow-light-enhanced gain in active photonic crystal waveguides.

Passive photonic crystals have been shown to exhibit a multitude of interesting phenomena, including slow-light propagation in line-defect waveguides. It was suggested that by incorporating an active material in the waveguide, slow light could be used to enhance the effective gain of the material, which would have interesting application prospects, for example enabling ultra-compact optical amp...

Mode dispersion in biperiodic photonic crystal waveguides

We propose and analyze biperiodic photonic crystal waveguides, where there are two sets of discrete translational symmetry along the propagation direction of the photonic crystal waveguides. We present a general method based on a spatial Fourier transform for the calculation of mode dispersion in such biperiodic waveguides. We demonstrate that by modifying the periodicity of only two rows of ai...

Coupling into slow-mode photonic crystal waveguides.

We study efficient injectors for coupling light from z-invariant ridge waveguides into slow Bloch modes of single-row defect photonic crystal waveguides. Two-dimensional vectorial computations performed with a Bloch mode theory approach predict that very high efficiencies (>90%) can be achieved for injector lengths of only a few wavelengths in length, even for small group velocities in the rang...

Nonlinear Gain Saturation in Active Slow Light Photonic Crystal Waveguides

Mode mixing in asymmetric double trench photonic crystal waveguides

We investigate both experimentally and theoretically the waveguiding properties of a novel double trench waveguide where a conventional single-mode strip waveguide is embedded in a two dimensional photonic crystal (PhC) slab formed in silicon on insulator (SOI) wafers. We demonstrate that the bandwidth for relatively low-loss (50dB/cm) waveguiding is significantly expanded to 250nm covering alm...