Young, Matthew and Roberts, Jonny and Woodhead, Christopher and Noori, Yasir and Sanchez, A. and Smakman, E. P. and Koenraad, P.M. and Hayne, Manus and Young, Robert (2014) Photoluminescence studies of single GaSb quantum rings. In: UK Semiconductors Conference, 2014-07-10.
Full text not available from this repository.Abstract
True sources of quantum light, where the number of photons in a pulse can be precisely tailored, prove to be a valuable resource in many emerging technologies. These include quantum key distribution, metrology and sub-diffraction limited imaging. Using individual zero-dimensional nanostructures within a structure can allow devices such as quantum light sources, such as single photon emitters1 and high-fidelity entangled photon sources2,3 to be created. The majority of research into nanostructures for quantum light sources has been self-assembled InAs/GaAs quantum dots. This system is, however, limited to low temperature operation. An alternate material system will be presented in this work, looking to overcome this limitation: GaSb/GaAs quantum rings. These heterostructures exhibit a type-II band alignment and have a very large hole confining potential. With its strong hole confinement the rings can emit light at room temperature. Results from micro-photoluminescence measurements on the dot system will be presented alongside scanning probe microscopy.