Title :
Band-edge lasing in gold-clad photonic-crystal membranes
Author :
Van Campenhout, Joris ; Bienstman, Peter ; Baets, Roel
Author_Institution :
Photonics Res. Group, Ghent Univ.-IMEC, Belgium
fDate :
7/1/2005 12:00:00 AM
Abstract :
We investigate the possibility to achieve band-edge lasing in optically thick gold-clad photonic-crystal (PhC) membranes, with a dielectric thickness of around 1 μm. We have performed a two-dimensional eigenmode-expansion analysis of band-edge resonators in one-dimensional PhCs. Material thresholds, quality factors, and emission efficiencies have been calculated for TE band-edge laser resonances on the second and third Γ-point. The second Γ-point sustains band-edge laser modes with quality factors above 2500 for a membrane thickness of 1 μm and a cavity length of 20 periods, however, with a very poor surface-emission efficiency. Band-edge laser modes located on the third Γ-point have lower quality factors but higher surface-emission efficiencies. In both cases, the PhC should be designed specifically to avoid coupling with lossy, higher order modes.
Keywords :
eigenvalues and eigenfunctions; gold; laser cavity resonators; laser modes; numerical analysis; optical waveguides; photonic crystals; solid lasers; Au; TE band-edge laser resonances; band-edge laser modes; band-edge lasing; band-edge resonators; dielectric thickness; eigenmode expansion; gold-clad photonic-crystal membranes; material thresholds; metallic waveguides; microlasers; quality factors; surface-emission efficiency; two-dimensional eigenmode-expansion analysis; Biomembranes; Dielectric materials; Laser modes; Optical materials; Optical resonators; Performance analysis; Q factor; Stimulated emission; Surface emitting lasers; Tellurium; Eigenmode expansion; metallic waveguides; microlasers; photonic crystals (PhCs);
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC.2005.851160
