Energy

1. Delocalized states in lateral Quantum Dot MoleculesMatthew Doty, University of Delaware, DMR 0844747 Laterally-separated pairs of InAs / GaAs quantum dots have been called lateral quantum dot molecules because they can confine single charges in neighboring potentials analogous to diatomic molecules. Our previous work has provided preliminary evidence of the existence of delocalized molecular-like states. Recent efforts have focused on spectroscopy of single lateral quantum dot molecules embedded in a diode structure. The figure at right shows distinct shifts in the energy of discrete spectral lines as the electric field is changed. These shifts are a signature of the controlled addition of single charges. Measurements of the energy shifts allow us to understand the material structure and may allow design of new materials for device applications. Samples from G. Salamo, U. of Arkansas Energy Applied Electric Field

2. Delocalized states in lateral Quantum Dot MoleculesMatthew Doty, University of Delaware, DMR 0844747 This award supports two K-12 teachers annually. The teachers spend the summer working with the PI and graduate students to understand research going on in the lab and develop educational modules that build off these research concepts to inspire new hands-on education. The program initiated through this award has now seeded additional programs supported by a number of independent grants. In 2012, 8 high school math and science teachers spent the summer developing new modules and experimental kits that are now available to all local teachers through the UD College of Engineering Lending Library. Middle schools students learning about the ultrafast high-power laser system used in the Doty lab. Graduate student Laura Vanderhoef (right) is explaining the system.