Numerical investigation of Littrow lasing in open resonator photonic crystal waveguidesW. H. P. Pernice1, F. P. Payne1 and D. F. G. Gallagher2
1 Department of Engineering Science, University of Oxford - Parks Road, Oxford, OX1 3PJ, UK, EU
2 Photon Design - 34 Leopold Street, Oxford, OX1 4TW, UK, EU
received 18 December 2007; accepted in final form 7 April 2008; published June 2008
published online 19 May 2008
We present a numerical analysis of in-plane lasing in open resonator photonic crystal (PhC) waveguides in the Littrow configuration. The intensity spectra corresponding to the resonant modes of PhC waveguide lasers are determined and agree closely with resonant modes in the band diagram of the waveguide. We investigate the dependence of the lasing behavior on the properties of the waveguide. In particular, our method allows for the determination of the lasing threshold, for which an optimal waveguide width is found. Because of the good reflectivity of the PhC mirrors the concept of open resonator waveguides holds promise for laterally small lasers.
42.55.Tv - Photonic crystal lasers and coherent effects.
02.70.Bf - Finite-difference methods.
42.25.Fx - Wave optics: Diffraction and scattering.
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