Photoluminescence spectroscopy and transmission electron microscopy imaging of InGaAs quantum dot chains Tyler Park Kenneth Clark David Meyer.

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Presentation transcript:

Photoluminescence spectroscopy and transmission electron microscopy imaging of InGaAs quantum dot chains Tyler Park Kenneth Clark David Meyer Andrew Perry Scott Thalman John Colton Haeyeon Yang APS 4CS Meeting 21-22 October 2011

Introducing the Quantum Dot Confine the electrons (carriers) in three dimensions by creating a potential barrier Quantum Well constrained in 1 dimension Quantum Wires constrained in 2 dimensions

Quantum Dot Chains Molecular Beam Epitaxy (MBE) Modified Stranski-Krastanov (SK) method Potential applications in quantum computing schemes Applications for narrowband infrared lasers and detectors Other applications similar to quantum dots Anneal

Photoluminescence Spectroscopy Photon Electron

Transmission Electron Microscopy Do we have chains? Size and spacing of quantum dots Chemical composition

TEM Images Quantum Dot? Platinum Carbon GaAs Capping Layer QD Layer 5 nm GaAs Substrate

Conclusion Plan view cuts and other cross-section cuts Photoluminescence lifetime measurements High resolution photoluminescence