scholarly journals Understanding the electric field control of the electronic and optical properties of strongly-coupled multi-layered quantum dot molecules

Nanoscale ◽  
2015 ◽  
Vol 7 (39) ◽  
pp. 16516-16529 ◽  
Author(s):  
Muhammad Usman
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Electric Field ◽  
Strongly Coupled ◽  
Electronic And Optical Properties ◽  
Quantum Dot Molecules ◽  
Field Control ◽  
Atomic States

An electric field transforms molecular states to atomic states.

Quantum-Dot Molecules for Potential Applications in Terahertz Devices

2004 ◽  
Vol 829 ◽  
Author(s):  
Valeria Gabriela Stoleru ◽  
Elias Towe ◽  
Chaoying Ni ◽  
Debdas Pal
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Strain Field ◽  
Strain Distribution ◽  
Major Step ◽  
Cross Sectional ◽  
Electronic And Optical Properties ◽  
Quantum Dot Molecules ◽  
Transmission Electron ◽  
Potential Applications

ABSTRACTThe experimental and theoretical results of the electronic and optical properties of quantum dot artificial molecules (AMs), formed by pairs of electronically coupled quantum dots (QDs), are presented here in order to identify the necessary conditions for the development of new types of terahertz (THz) injection lasers based on intraband carrier transitions. We have performed analytical calculations to obtain the spatial strain distribution in vertically aligned (In, Ga)As QDs grown on (001) GaAs substrates by molecular beam epitaxy. Electronic coupling of the dots, mainly governed by the thickness of the separating barrier between the dot layers, is allowed due to the strain field-assisted self-organization of the dots. The calculated strain field reproduces our cross sectional high-resolution transmission electron microscopy observations very well. We further take into account the microscopic effects of the spatial strain distribution on carrier confinement potentials, and compute the electronic structure of the AM. Our calculations of the peak luminescence energies are in good agreement with our experimental results and those of others. The growth of quantum dot molecules represents a major step in tailoring the electronic and optical properties of the nanostructures.

Electric field control of exciton states in quantum dot molecules

2004 ◽  
Vol 21 (2-4) ◽  
pp. 171-174 ◽  
Author(s):  
G Ortner ◽  
M Bayer ◽  
A Kress ◽  
A Forchel ◽  
Y.B Lyanda-Geller ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Electric Field ◽  
Quantum Dot Molecules ◽  
Field Control

Computational study on strain and electric field tunable electronic and optical properties of InTe monolayer

2021 ◽  
Vol 151 ◽  
pp. 106816
Author(s):  
Thi-Nga Do ◽  
Vo T.T. Vi ◽  
Nguyen T.T. Binh ◽  
Nguyen N. Hieu ◽  
Nguyen V. Hieu
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
Computational Study ◽  
Electronic And Optical Properties
Sign in / Sign up

Export Citation Format

Share Document