Intersubband excitations in ultrathin core-shell nanowires in the one-dimensional quantum limit probed by resonant inelastic light scattering

2021 ◽  
Vol 104 (23) ◽  
Author(s):  
Sebastian Meier ◽  
Paulo E. Faria Junior ◽  
Ferdinand Haas ◽  
Emma-Sophia Heller ◽  
Florian Dirnberger ◽  
...  
Keyword(s):  
Light Scattering ◽  
Quantum Limit ◽  
Core Shell ◽  
One Dimensional ◽  
Inelastic Light Scattering ◽  
The One ◽  
Shell Nanowires

Spatially Indirect Optical Transitions in Semiconductor Multiple Quantum Wires

1989 ◽  
Vol 160 ◽  
Author(s):  
J. S. Weiner ◽  
G. Danan ◽  
A. Pinczuk ◽  
J. Valladares ◽  
L. N. Pfeiffer ◽  
...  
Keyword(s):  
Light Scattering ◽  
Quantum Wells ◽  
Quantum Wires ◽  
Multiple Quantum ◽  
Optical Transitions ◽  
Photoluminescence Spectra ◽  
Dimensional Electron ◽  
One Dimensional ◽  
Inelastic Light Scattering ◽  
The One

AbstractIn optical experiments with laterally patterned modulation-doped GaAs/AlGaAs quantum wells we observe spatially separate confinement of electrons and holes to one-dimensional quantum wires. We determine the one-dimensional subband spacing and Fermi energy from inelastic light scattering and photoluminescence spectra. From these measurements we directly determine the one-dimensional electron density.

An unified approach to inelastic light scattering in Keldysh–Schwinger functional integral formalism

2015 ◽  
Vol 29 (07) ◽  
pp. 1550040 ◽  
Author(s):  
Hyun Cheol Lee
Keyword(s):  
Light Scattering ◽  
Cross Sections ◽  
Golden Rule ◽  
Functional Integral ◽  
Integral Formalism ◽  
Inelastic Light Scattering ◽  
Scattering Geometry ◽  
The One ◽  
Resonant Part ◽  
Functional Integral Formalism

We propose a theoretical framework which can treat the nonresonant and the resonant inelastic light scattering on an equal footing in the form of correlation function, employing Keldysh–Schwinger functional integral formalism. The interference between the nonresonant and the resonant process can be also incorporated in this framework. This approach is applied to the magnetic Raman scattering of two-dimensional antiferromagnetic insulators. The entire set of the scattering cross-sections are obtained at finite temperature, the result for the resonant part agrees with the one obtained by the conventional Fermi golden rule at zero temperature. The interference contribution is shown to be very sensitive to the scattering geometry and the band structure.

Hydrogen generation enhanced by nano-forest structures

RSC Advances ◽  
2016 ◽  
Vol 6 (16) ◽  
pp. 12953-12958 ◽  
Author(s):  
Keumyoung Seo ◽  
Taekyung Lim ◽  
Edmund M. Mills ◽  
Sangtae Kim ◽  
Sanghyun Ju
Keyword(s):  
Surface Area ◽  
Hierarchical Structure ◽  
Hydrogen Generation ◽  
Three Dimensional ◽  
Core Shell ◽  
Porous Disk ◽  
One Dimensional ◽  
Reaction Surface ◽  
Shell Nanowires

A hierarchical structure of one-dimensional CeO2/SnO2 core–shell nanowires on a three-dimensional porous disk (namely the “nanowire forest”) could maximize the reaction surface area and avoid coarsening during hydrogen generation.

FACILE FABRICATION OF ONE-DIMENSIONAL MULTI-COMPONENT NANOSTRUCTURES USING POROUS ANODIZED ALUMINA MEMBRANE

COSMOS ◽  
2010 ◽  
Vol 06 (02) ◽  
pp. 221-234
Author(s):  
LOH PUI YEE ◽  
LIU CHENMIN ◽  
PUA WEICHENG ◽  
KAM FONG YU ◽  
CHIN WEE SHONG
Keyword(s):  
Good Control ◽  
Short Review ◽  
Core Shell ◽  
Alumina Membrane ◽  
One Dimensional ◽  
Metal Metal ◽  
Polymer Metal ◽  
Facile Fabrication ◽  
Multiwall Nanotubes ◽  
Shell Nanowires

In this short review, we report the facile fabrication of various interesting multi-component nanostructures including arrays of core-shell nanowires, multiwall nanotubes, segmented nanowires and multilayer stacked nanodisks, using anodized alumina membrane (AAM). We demonstrate that metallic (Cu, Ni and Au) and polymeric (PPV and PPy) one-dimensional (1D) arrays can be readily prepared by electrochemical deposition into the AAM. By optimizing the experimental design and conditions, we developed techniques to produce various multi-component nanostructures such as polymer/metal or metal/metal core-shell nanowires as well as nanotubes, with reasonably good control over both the length and the shell thickness of the nanostructures. Furthermore, we extend this method to make segmented nanowires as well as multilayer stacked nanodisks. Selective functionalization of the segmented nanowires resulted in end-on or side-on adhesion of nanowires during assembly. We illustrate the possibility of utilizing these 1D arrays to present patterns with luminescent and/or magnetic properties at this length scale.

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