Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 86: Photonic crystals and cavities

HL 86.6: Vortrag

Donnerstag, 3. April 2014, 10:45–11:00, POT 051

Phononic Crystal Waveguides in GaAs — •Golnaz Azodi and James Stotz — Queen's University, Kingston, Canada

Surface acoustic waves (SAWs) provide a unique platform to create dynamically modulated semiconductor nanostructures for use in quantum information processing. The use of plane wave SAWs is the most practical and have been applied to a number of different quantum systems. However, as the complexity of a quantum system increases, the acoustic energy may be required to be delivered locally. In leveraging the tremendous success of photonic crystals, the use of phononic crystals enables the creation of phononic waveguide cavities to control the delivery of the acoustic modulation. To this end, we will discuss the development and recent results of fabricating phononic crystal waveguides on GaAs. While an unusual platform for SAW devices, GaAs is a rich platform for quantum systems, and it uniquely balances the demands for such hybrid systems. We will present FDTD modelling of the devices, and discuss the limitations that are placed on the design of the waveguides. To measure the effectiveness of the phononic crystal waveguides, we can image the SAW using a Sagnac interferometer, which provides a spatial mapping of the SAW as it travels through the waveguide structures.