This paper discusses the design and optimisation of a two-dimensional photonic crystal membrane defect cavity for use as a laser in gas sensing and communications applications in the 3-4µm wavelength range. The design is based on a modified L3 cavity in an aluminium-indium-gallium-antimonide membrane structure which contains two strained quantum wells. A detailed study of Q factor for different thicknesses and hole positions is carried out and peak emission is predicted at a wavelength of 3.372µm with a Q factor of 26233 for an optimised membrane thickness of 1000nm. A focused ion beam procedure is described for creating the membrane directly in a Fabry-Perot laser structure. A membrane is fabricated and the photonic crystal pattern is etched into the membrane.
|Translated title of the contribution||Design and fabrication of a midinfrared photonic crystal defect cavity in indium antimonide|
|Title of host publication||2nd International Conference on Metamaterials, Photonic Crystals and Plasmonics (META), Cairo, Egypt|
|Publication status||Published - 25 Feb 2010|