Theory of Nanostructures

Principal Investigators:

Dr. Thomas Reinecke, tom.reinecke@nrl.navy.mil

Dr. Sophia E. Economou, sophia.economou@nrl.navy.mil

Theoretical studies of the unique electronic and optical properties of nanostructures are being done, often in conjunction with experiment in the Branch. A range of techniques are used including many-body approaches for optical properties, ab initio electronic calculations for electronic properties and geometries, finite element techniques for complex geometries, and dynamical matrices for vibrational properties. Recent work has addressed the optical properties of single and coupled quantum dots for implementations for quantum information, quantum gates for quantum information, quantum dots in semiconductor microcavities for advanced quantum electronics, adsorption of a range of adsorbates on carbon nanotubes and it effects on conductance and capacitance for sensors.

2011

• Optical Control of Coherent Interactions between Electron Spins and InGaAs Quantum Dots, Physical Review Letters Vol 107 Issue 13, Article 137402 (2011).
• Electron-Nuclear Dynamics in a Quantum Dot under Nonunitary Electron Control, Physical Review Letters, Vol 107 Issue 4, 047601 (2011)

2010

• Optically Generated 2-Dimensional Photonic Cluster State from Coupled Quantum Dots, Physical Review Letters 105, 093601 (Aug 2010).

2008

• Optically induced spin gates in coupled quantum dots using the electron-hole exchange interaction, Physical Review B 78, 115306 (2008).
• Electron spin dynamics due to hyperfine coupling in quantum dots, Physical Review B 77, 073313 (2008).

2007

• Mixing of two-electron spin states in semiconductor quantum dot, Phys. Rev. B: 75, 041309(RC) (2007).
• Adsorption of simple derivatives on carbon nanotubes, Physical Review B 75, 155415 (2007).
• Theory of fast optical spin rotation in a quantum dot based on geometric phases and trapped states, Physical Review Letters 99, 217401 (2007).

2006

• Optical Signatures of Coupled Quantum Dots, Science 311, 636 (2006).
• Electrically tunable g-factors in quantum dot molecular spin states, Phys. Rev. Lett. 97, 197202 (2006).
• The role of defects in SWNT network chemical detection, NanoLetters 6, 1747 (2006).

2005

• Chemical detection using a single-walled carbon nanotube capacitor, Science 307, 1942 (2005).

2004

• Strong coupling in a single quantum dot - semiconductor microcavity system, J.P. Reithmaier, Nature 432, 197 (2004).

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