Coupled photonic crystal (PhC) cavity arrays have recently been found to increase the output power of nanocavity lasers by coherent coupling of a large number of cavities . We have measured the sub-threshold behaviour of such structures in order to gain better understanding of the mode structure. PhC structures defined by circular holes placed in a quadratic lattice with pitch a=280 nm were fabricated in a GaAs membrane and cavity arrays were realized by introducing single missing holes with intracavity hole distances of two, three, five and seven holes. Arrays with different number of coupled cavities were fabricated and characterized using photoluminescence measurements of quantum dots embedded in the GaAs PhC membrane. Since the collection spot size was ~2.5 μm and therefore small compared to the arrays, spectra were taken at several positions of each array.
|Publication status||Published - 2009|
|Event||8th International Symposium on Photonic and Electromagnetic Crystal Structures - Sydney, Australia|
Duration: 5 Apr 2009 → 9 Apr 2009
Conference number: 8
|Conference||8th International Symposium on Photonic and Electromagnetic Crystal Structures|
|Period||05/04/2009 → 09/04/2009|