Quantum Dots

Gerhard Klimeck, Electrical and Computer Engineering, Purdue University Table of Contents: 00:00 Nano 101 Quantum Dots 00:53 Presentation Outline 01:59 Classical Macroscopic Particles 03:35 Propagating Plane Waves 05:50 Huygens' Principle 05:59 Huygens' Principle 06:08 Propagating Plane Waves Light is an Electromagnetic Wave 07:46 Standing Waves 10:48 Frequency Content of Light 11:38 Presentation Outline 12:11 Strange Experimental Observations The Advent of Quantum Mechanics 16:10 Strange Experimental Observations The Advent of Quantum Mechanics 20:46 Wave - Particle Duality 21:37 More Mind Games 22:29 Presentation Outline 22:45 What is a Quantum Dot ? Basic Application Mechanisms 27:38 QD Example Implementations 30:32 Quantum Dot Applications 31:47 Quantum Dot Applications 2 32:44 Quantum Dots as Optical Detectors 33:47 Lighting 34:15 Quantum Dots and Single Electronics 38:07 Presentation Outline 38:32 NEMO 3-D Technical Approach 40:46 Atomistic Tight-Binding Hamiltonian 41:22 Nearest-Neighbor sp3d5s* Model 43:47 Parallelization and Methods 44:15 From Beowulf Concept to Commodity Products in 4 Generations 45:31 Parallelization Benchmark Apple G5 46:30 Some Wavefunctions of a Pyramidal Quantum Dot 47:11 HPC and Visualization NEMO 3-D: Electronic structure for tens of Million Atoms 49:07 Proof of Concept Extraction of Targeted Interior Eigenstates 49:47 Proof of Concept Extraction of Targeted Interior Eigenstates 50:30 Presentation Outline 50:33 Vertically Coupled Two-Dot Molecule 52:19 Vertically Coupled Seven-Dot Molecule Identical dots 52:54 Vertically Coupled Seven-Dot Molecule Growth asymmetry 53:29 VolQD Million Atom Volume Rendering on a single GPU 53:44 VolQD Drilling down into 3-D Volume Data 54:01 VolQD Discovery of Surprising Nodal Symmetries 54:45 Presentation Outline 55:37 Questions & Answers Quantum Dots are man-made artificial atoms that confine electrons to a small space. As such they have atomic-like behavior and enable the study of quantum mechanical effects on a length scale that is around 100 times larger than the pure atomic scale. Quantum dots offer application opportunities in optical sensors, lasers, and advanced electronic devices for memory and logic. This seminar starts with an overview of wavelike and particle like properties and motivates the existence of quantum mechanics. It closes the quantum mechanics point of view with these new fascinating artificial atoms. This resource can be found on at: