论文信息 - Realisation of ultra-low loss photonic crystal slab waveguide devices

Realisation of ultra-low loss photonic crystal slab waveguide devices

In this paper we demonstrate low loss transmission both above and below the primary band-gap for a photonic crystal (PC) super-prism device consisting of 600 lattice periods. By modifying the refractive index of the holes, we reduce overall insertion loss to just 4.5 dB across the entire visible spectrum. We show that the remaining loss is predominantly due to impedance mismatch at the boundaries between patterned and unpatterned slab waveguide regions. Experimental loss measurements compare well with finite difference time domain simulations.

[1] A. Scherer,et al. Coupled-resonator optical waveguide: a proposal and analysis. , 1999, Optics letters.

[2] Martin D. B. Charlton,et al. Guided Mode Analysis and Fabrication of a 2-Dimensional Visible Photonic Band Structure Confined within a Planar Semiconductor Waveguide , 1997 .

[3] Thomas F. Krauss,et al. Two-dimensional photonic-bandgap structures operating at near-infrared wavelengths , 1996, Nature.

[4] J. Joannopoulos,et al. Photonic crystals: putting a new twist on light , 1997, Nature.

[5] Henri Benisty,et al. Radiation losses in planar photonic crystals: two- dimensional representation of hole depth and shape by an imaginary dielectric constant , 2003 .

[6] Majd Zoorob,et al. Separation of photonic crystal waveguides modes using femtosecond time-of-flight , 2002 .

[7] Hang Zheng,et al. Time delay of light propagation through defect modes of one-dimensional photonic band-gap structures , 2000 .

[8] Majd Zoorob,et al. Visible-wavelength super-refraction in photonic crystal superprisms , 2004 .

[9] Masaya Notomi,et al. Superprism phenomena in photonic crystals: toward microscale lightwave circuits , 1999 .