Experimental and atomistic theoretical study of degree of polarization from multilayer InAs/GaAs quantum dot stacks

M Usman, T Inoue, Y Harda, G Klimeck, T Kita - Physical Review B …, 2011‏ - APS
Recent experimental measurements, without any theoretical guidance, showed that isotropic
polarization response can be achieved by increasing the number of quantum-dot (QD) …

Atomistic theoretical study of electronic and polarization properties of single and vertically stacked elliptical InAs quantum dots

M Usman - Physical Review B—Condensed Matter and Materials …, 2012‏ - APS
The demonstration of isotropic polarization response from semiconductor quantum dots
(QDs) is a crucial step towards the design of several optoelectronic technologies. Among …

Experimental and theoretical study of polarization-dependent optical transitions in InAs quantum dots at telecommunication-wavelengths (1300-1500 nm)

M Usman, S Heck, E Clarke, P Spencer… - Journal of Applied …, 2011‏ - pubs.aip.org
The design of some optical devices, such as semiconductor optical amplifiers for
telecommunication applications, requires polarization-insensitive optical emission at long …

The polarization response in InAs quantum dots: theoretical correlation between composition and electronic properties

M Usman, V Tasco, MT Todaro, M De Giorgi… - …, 2012‏ - iopscience.iop.org
III–V growth and surface conditions strongly influence the physical structure and resulting
optical properties of self-assembled quantum dots (QDs). Beyond the design of a desired …

In-plane polarization anisotropy of ground state optical intensity in InAs/GaAs quantum dots

M Usman - Journal of Applied Physics, 2011‏ - pubs.aip.org
The design of optical devices such as lasers and semiconductor optical amplifiers for
telecommunication applications requires polarization insensitive optical emissions in the …

Tuning of polarization sensitivity in closely stacked trilayer InAs/GaAs quantum dots induced by overgrowth dynamics

V Tasco, M Usman, M De Giorgi, A Passaseo - Nanotechnology, 2014‏ - iopscience.iop.org
Tailoring of electronic and optical properties of self-assembled InAs quantum dots (QDs) is a
critical limit for the design of several QD-based optoelectronic devices operating in the …

[HTML][HTML] Optical TCAD on the Net: A tight-binding study of inter-band light transitions in self-assembled InAs/GaAs quantum dot photodetectors

H Ryu, D Nam, BY Ahn, JSR Lee, K Cho, S Lee… - … and Computer Modelling, 2013‏ - Elsevier
A new capability of our well-known NEMO 3-D simulator (Ref. Klimeck et al., 2007 [10]) is
introduced by carefully investigating the utility of III–V semiconductor quantum dots as …

[HTML][HTML] Optical anisotropy in type-II ZnTe/ZnSe submonolayer quantum dots

H Ji, S Dhomkar, R Wu, V Shuvayev… - Journal of Applied …, 2016‏ - pubs.aip.org
Linearly polarized photoluminescence is observed for type-II ZnTe/ZnSe submonolayer
quantum dots (QDs). The comparison of spectral dependence of the degree of linear …

Size-dependent Electronic and Polarization Properties of Multi-Layer InAs Quantum Dot Molecules

M Usman - Quantum Dot Molecules, 2013‏ - Springer
In this chapter, we analyze the polarization response of multi-layer quantum dot molecules
(QDMs) containing up to nine vertically stacked quantum dot layers by carrying out a …

Atomistic theoretical study of electronic and polarization properties of elliptical, single and vertically stacked InAs quantum dots

M Usman - arxiv preprint arxiv:1210.1951, 2012‏ - arxiv.org
The demonstration of isotropic polarization response from semiconductor quantum dots
(QDs) is a crucial step towards the design of several optoelectronic technologies. Among …