Tags: quantum dots

More tags

Description

Quantum dots have a small, countable number of electrons confined in a small space. Their electrons are confined by having a tiny bit of conducting material surrounded on all sides by an insulating material. If the insulator is strong enough, and the conducting volume is small enough, then the confinement will force the electrons to have discrete (quantized) energy levels. These energy levels can influence the device behavior at a macroscopic scale, showing up, for example, as peaks in the conductance. Because of the quantized energy levels, quantum dots have been called "artificial atoms." Neighboring, weakly-coupled quantum dots have been called "artificial molecules."

Learn more about quantum dots from the many resources on this site, listed below. More information on Quantum dots can be found here.

Online Presentations (1-20 of 64)

  1. Properties of Nanomaterials

    Online Presentations | 30 Jul 2022 | Contributor(s):: Peter Kazarinoff, Mariel Kolker, NACK Network

  2. Valley Dependent g-factors in Silicon: Role of Spin-Orbit and Micromagnets

    Online Presentations | 13 Dec 2016 | Contributor(s):: Rajib Rahman

    In this talk I will show that spin splittings in silicon quantum dots are inherently valley-dependent. Interface disorder, such as monoatomic steps, can strongly affect the intrinsic spin-orbit coupling and can cause device-to-device variations in g-factors. I will also describe the anisotropy of...

  3. E304 L8.1.3: Nanophotonics - Quantum Dots

    Online Presentations | 15 Jun 2016 | Contributor(s):: ASSIST ERC

  4. [Illinois] Colloidal Quantum Dots and Plasmonics Particles II

    Online Presentations | 21 Apr 2016 | Contributor(s):: Jao van de Lagemaat

  5. Screening Effect on Electric Field Produced by Spontaneous Polarization in ZnO Quantum Dot in Electrolyte

    Online Presentations | 05 Jan 2016 | Contributor(s):: Xinia Meshik, Min S. Choi, Mitra Dutta, Michael Stroscio

    IWCE 2015 presentation. in this paper, the calculation of the strength of the electrostatic field produced by zno quantum dots due to the spontaneous polarization in a physiological electrolyte and its application on retinal horizontal cells are presented.

  6. Quantum Dots

    Online Presentations | 07 May 2015 | Contributor(s):: Sebastien Maeder, NACK Network

    OutlineIntroductionQuantum ConfinementQD SynthesisColloidal MethodsEpitaxial GrowthApplicationsBiologicalLight EmittersAdditionalApplications

  7. Why quantum dot simulation domain must contain multi-million atoms?

    Online Presentations | 11 Jan 2013 | Contributor(s):: Muhammad Usman

    The InGaAs quantum dots obtained from the self-assembly growth process are heavily strained. The long-range strain and piezoelectric fields significantly modifies the electronic structure of the quantum dots. This imposes a critical constraint on the minimum size of the simulation domain to study...

  8. Excited State Spectroscopy of a Quantum Dot Molecule

    Online Presentations | 11 Jan 2013 | Contributor(s):: Muhammad Usman

    Atomistic electronic structure calculations are performed to study the coherent inter-dot couplings of the electronic states in a single InGaAs quantum dot molecule. The experimentally observed excitonic spectrum by Krenner et al (Phys. Rev. Lett. 94 057402, 2005) is quantitatively reproduced,...

  9. NEMO5 Tutorial 5C: Quantum Dots with Strain and Electronic Wave Functions

    Online Presentations | 18 Jul 2012 | Contributor(s):: Yuling Hsueh

  10. NEMO5 Tutorial 5A: Devi ce Simulation - Quantum Dots

    Online Presentations | 17 Jul 2012 | Contributor(s):: Jean Michel D Sellier

    This presentation introduces the capabilities of NEMO5 to simulate quantum dots.

  11. NEMO5 Overview Presentation

    Online Presentations | 17 Jul 2012 | Contributor(s):: Tillmann Christoph Kubis, Michael Povolotskyi, Jean Michel D Sellier, James Fonseca, Gerhard Klimeck

    This presentation gives an overview of the current functionality of NEMO5.

  12. Quantum Dot based Photonic Devices

    Online Presentations | 01 Apr 2012 | Contributor(s):: Muhammad Usman

    Deployment of nanometer-sized semiconductor quantum dots (QDs) in the active region ofphotonic devices such as lasers, semiconductor optical amplifiers (SOA's), photo-detectors etc.for the next generation communication systems offers unique characteristics such astemperature-insensitivity, high...

  13. Polarization Response of Multi-layer InAs Quantum Dot Stacks

    Online Presentations | 25 Oct 2011 | Contributor(s):: Muhammad Usman

    Recent experimental measurements, without any theoretical guidance, showed that isotropic polarization response can be achieved by increasing the number of QD layers in a QD stack. In this work, we analyse the polarization response of multi-layer quantum dot stacks containing up to nine quantum...

  14. BME 695L Lecture 5: Nanomaterials for Core Design

    Online Presentations | 03 Oct 2011 | Contributor(s):: James Leary

    See references below for related reading.5.1      Introduction5.1.1    core building blocks5.1.2    functional cores5.1.3    functionalizing the core surface5.2      Ferric...

  15. The History of Semiconductor Heterostructures Research: From Early Double Heterostructure Concept to Modern Quantum Dot Structures

    Online Presentations | 11 Jul 2011 | Contributor(s):: Zhores I. Alferov

    It would be very difficult today to imagine solid-state physics without semiconductor heterostructures. Semiconductor heterostructures and especially double heterostructures, including quantum wells, quantum wires and quantum dots, currently comprise the object of investigation of two thirds of...

  16. Illinois Nano EP Seminar Series Spring 2010 - Lecture 8: Quantum Dot and Nanopore Lasers

    Online Presentations | 12 Apr 2011 | Contributor(s):: James J. Coleman

    We describe the growth, processing, and characteristics of self‐assembled and patterned quantum dot and nanopore lasers that exhibit interesting effects arising from reduction of the active medium to the quantum regime (

  17. Tutorial 4b: Introduction to the NEMO3D Tool - Electronic Structure and Transport in 3D

    Online Presentations | 29 Mar 2011 | Contributor(s):: Gerhard Klimeck

    Electronic Structure and Transport in 3D - Quantum Dots, Nanowires and Ultra-Thin Body Transistors

  18. Atomistic Modeling and Simulation Tools for Nanoelectronics and their Deployment on nanoHUB.org

    Online Presentations | 16 Dec 2010 | Contributor(s):: Gerhard Klimeck

    At the nanometer scale the concepts of device and material meet and a new device is a new material and vice versa. While atomistic device representations are novel to device physicists, the semiconductor materials modeling community usually treats infinitely periodic structures. Two electronic...

  19. Nanoelectronic Modeling Lecture 34: Alloy Disorder in Quantum Dots

    Online Presentations | 05 Aug 2010 | Contributor(s):: Gerhard Klimeck, Timothy Boykin, Chris Bowen

    This presentation discusses the consequences of Alloy Disorder in strained InGaAs Quantum Dots Reminder of the origin of bandstructure and bandstructure engineeringWhat happens when there is disorder?Concept of disorder in the local bandstructureConfiguration noise, concentration noise,...

  20. Nanoelectronic Modeling Lecture 32: Strain Layer Design through Quantum Dot TCAD

    Online Presentations | 04 Aug 2010 | Contributor(s):: Gerhard Klimeck, Muhammad Usman

    This presentation demonstrates the utilization of NEMO3D to understand complex experimental data of embedded InAs quantum dots that are selectively overgrown with a strain reducing InGaAs layer. Different alloy concentrations of the strain layer tune the optical emission and absorption wavelength...