Experimental demonstration of high quality factor, x-dipole modes in InAs∕InP quantum dot photonic crystal microcavity membranes

The authors study the quality factor Q of the x-dipole mode in single missing hole defect photonic crystal microcavities in InAs∕InP quantum dot membranes as a function of the structural design parameters. Photoluminescence experiments show an optimized Q in excess of 28 000 for a wavelength close to λ=1550nm. This is to be compared with a Q of 57 000 determined by finite difference time domain calculations. The fabrication tolerances necessary to achieve experimental Q values close to those predicted by theory are identified.