Results 21 to 30 of about 177,744 (299)

Fabrication and evaluation of series-triple quantum dots by thermal oxidation of silicon nanowire

AIP Advances, 2015
Series-connected triple quantum dots were fabricated by a simple two-step oxidation technique using the pattern-dependent oxidation of a silicon nanowire and an additional oxidation of the nanowire through the gap of the fine gates attached to the ...
Takafumi Uchida, Mingyu Jo, Atsushi Tsurumaki-Fukuchi, Masashi Arita, Akira Fujiwara, Yasuo Takahashi   +5 more
doaj   +1 more source

Theoretical study of intraband optical transitions in conduction band of dot-in-a-well system

AIP Advances, 2014
We study numerically absorption optical spectra of n-doped InAs/In015Ga085As/GaAs quantum dot-in-a-well systems. The absorption spectra are mainly determined by the size of a quantum dot and have weak dependence on the thickness of quantum well and ...
Venkata R. Chaganti, Vadym Apalkov
doaj   +1 more source

Enhanced Biosensor Based on Assembled Porous Silicon Microcavities Using CdSe/ZnS Quantum Dots

IEEE Photonics Journal, 2021
To further improve the sensitivity of porous silicon-assembled microcavity biosensors, the detection of porous silicon assembled microcavity by angle spectrum method is also researched.
Miao Sun, Shuangshuang Zhang, Jiajia Wang, Zhenhong Jia, Xiaoyi Lv, Xiaohui Huang   +5 more
doaj   +1 more source

Electronic structure of rectangular quantum dots [PDF]

Physical Review B, 2003
We study the ground state properties of rectangular quantum dots by using the spin-density-functional theory and quantum Monte Carlo methods. The dot geometry is determined by an infinite hard-wall potential to enable comparison to manufactured, rectangular-shaped quantum dots. We show that the electronic structure is very sensitive to the deformation,
Räsänen, Esa, Saarikoski, H., Stavrou, V.N., Harju, A., Puska, M.J., Nieminen, R.M.   +5 more
openaire   +3 more sources

Coupling of PbS Quantum Dots to Photonic Crystal Cavities at Room Temperature

, 2005
We demonstrate the coupling of PbS quantum dot emission to photonic crystal cavities at room temperature. The cavities are defined in 33% Al, AlGaAs membranes on top of oxidized AlAs.
Englund, Dirk, Fushman, Ilya, Vuckovic, Jelena   +2 more
core   +1 more source

Spin-orbit-induced circulating currents in a semiconductor nanostructure [PDF]

, 2014
Circulating orbital currents produced by the spin-orbit interaction for a single electron spin in a quantum dot are explicitly evaluated at zero magnetic field, along with their effect on the total magnetic moment (spin and orbital) of the electron spin.
Flatté, M. E., Koenraad, P. M., Silov, A. Yu., van Bree, J.   +3 more
core   +2 more sources

Single- and few-electron dynamic quantum dots in a perpendicular magnetic field

, 2010
We present experimental studies of the current pumped through a dynamic quantum dot over a wide range of magnetic fields. At low fields we observe repeatable structure indicating increased confinement of the electrons in the dynamic dot. At higher fields
Blumenthal, M. D., Fletcher, J. D., Giblin, S. P., Gumbs, Godfrey, Janssen, T. J. B. M., Jones, G. A. C., Kataoka, M., Nicoll, C. A., Pepper, M., Ritchie, D. A., Thorn, A. L., Wright, S. J.   +11 more
core   +1 more source

Universal fine-structure eraser for quantum dots

Optics Express, 2018
The measurable degree of entanglement from a quantum dot via the biexciton-exciton cascade depends crucially on the bright exciton fine-structure splitting and on the detection time resolution. Here, we propose an optical approach with fast rotating waveplates to erase this fine-structure splitting and therefore obtain a high degree of entanglement ...
Fognini, A.W. (author), Ahmadi, A. (author), Daley, S. J. (author), Reimer, M.E. (author), Zwiller, V.G. (author)   +4 more
openaire   +5 more sources

Deep Ultraviolet BGaN Quantum Dot structures

University of Thi-Qar Journal of Science, 2022
This research studies boron-containing quantum dot (QD) structures that emit the ultraviolet. Ternary and quaternary lattice-matched structure:, , , , ,, , and and their TE and TM gain spectra, spontaneous emission, spontaneous polarization, and piezoelectric polarization have been examined in these structures.
Yasmeen Saad, Amin Habbeb AL-Khursan
openaire   +2 more sources

Photovoltaic Performance of a Nanowire/Quantum Dot Hybrid Nanostructure Array Solar Cell

Nanoscale Research Letters, 2018
An innovative solar cell based on a nanowire/quantum dot hybrid nanostructure array is designed and analyzed. By growing multilayer InAs quantum dots on the sidewalls of GaAs nanowires, not only the absorption spectrum of GaAs nanowires is extended by ...
Yao Wu, Xin Yan, Xia Zhang, Xiaomin Ren
doaj   +1 more source