Quantum Dot Wave Function (Quantum Dot Lab)
02 Feb 2011 | Animations | Contributor(s): Gerhard Klimeck, David S. Ebert, Wei Qiao
Electron density of an artificial atom. The animation sequence shows various electronic states in an Indium Arsenide (InAs)/Gallium Arsenide (GaAs) self-assembled quantum dot.
Quantum Dot Wave Function (still image)
31 Jan 2011 | Animations | Contributor(s): Gerhard Klimeck, David S. Ebert, Wei Qiao
Electron density of an artificial atom. The image shown displays the excited electron state in an Indium Arsenide (InAs) / Gallium Arsenide (GaAs) self-assembled quantum dot.
VolQD: Graphics Hardware Accelerated Interactive Visual Analytics of Multi-million Atom Nanoelectronics Simulations
13 Dec 2005 | Online Presentations | Contributor(s): Wei Qiao
In this work we present a hardware-accelerated direct volume rendering
system for visualizing multivariate wave functions in semiconducting
quantum dot (QD) simulations. The simulation data
contains the probability density values of multiple electron orbitals
for up to tens of millions of atoms, computed by the NEMO3-
D quantum device simulator software run on large-scale cluster
architectures. These atoms form two interpenetrating crystalline
Face Centered Cubic lattices (FCC), where each FCC cell comprises
the eight corners of a cubic cell and six additional face
centers. We have developed compact representation techniques
for the FCC lattice within PC graphics hardware texture memory,
hardware-accelerated linear and cubic reconstruction schemes,
and new multi-field rendering techniques utilizing logarithmic scale
transfer functions. Our system also enables the user to drill down
through the simulation data and execute statistical queries using
general-purpose computing on the GPU (GPGPU).