Coherent control of photon-assisted tunneling between quantum dots: A theoretical approach using genetic algorithms

2002 ◽  
Vol 65 (23) ◽  
Author(s):  
Ilia Grigorenko ◽  
Oliver Speer ◽  
Martin E. Garcia
Keyword(s):  
Quantum Dots ◽  
Genetic Algorithms ◽  
Theoretical Approach ◽  
Coherent Control ◽  
Assisted Tunneling

Few-Particle Effects in Nonlinear Optical Spectra of Semiconductor Quantum Dots

1999 ◽  
Vol 571 ◽  
Author(s):  
Ulrich Hohenesteri ◽  
Fausto Rossi ◽  
Elisa Molinari
Keyword(s):  
Quantum Dots ◽  
Density Matrix ◽  
Nonlinear Optical ◽  
Coherent Control ◽  
Optical Spectra ◽  
Carrier Dynamics ◽  
Semiconductor Quantum Dots ◽  
Nonequilibrium Carrier ◽  
Optical Nonlinearities ◽  
Matrix Approach

ABSTRACTWe present a density-matrix approach for the description of nonequilibrium carrier dynamics in optically excited semiconductor quantum dots, that explicitly accounts for exciton-exciton as well as exciton-carrier interactions. Within this framework, we analyze few-particle effects in the optical spectra and provide a consistent description of additional peaks appearing at high photoexcitation density. We discuss possible applications of such optical nonlinearities in future coherent-control experiments.

scholarly journals Photon assisted tunneling through three quantum dots with spin-orbit-coupling

2014 ◽  
Vol 116 (6) ◽  
pp. 063708 ◽  
Author(s):  
Han-Zhao Tang ◽  
Xing-Tao An ◽  
Ai-Kun Wang ◽  
Jian-Jun Liu
Keyword(s):  
Quantum Dots ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Assisted Tunneling

Surface chemistry and density distribution influence on visible luminescence of silicon quantum dots: an experimental and theoretical approach

2017 ◽  
Vol 19 (2) ◽  
pp. 1526-1535 ◽  
Author(s):  
Ateet Dutt ◽  
Yasuhiro Matsumoto ◽  
G. Santana-Rodríguez ◽  
Estrella Ramos ◽  
B. Marel Monroy ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Chemistry ◽  
Density Distribution ◽  
Theoretical Approach ◽  
Silicon Quantum Dots ◽  
Visible Luminescence

Visible luminescence and hence the mechanism of emission from Si QDs depending on the size and/or the passivation environment are presented.

scholarly journals Zero-Bias Anomalies and Boson-Assisted Tunneling Through Quantum Dots

1996 ◽  
Vol 76 (10) ◽  
pp. 1715-1718 ◽  
Author(s):  
Jürgen König ◽  
Herbert Schoeller ◽  
Gerd Schön
Keyword(s):  
Quantum Dots ◽  
Zero Bias ◽  
Assisted Tunneling

scholarly journals Optical control of the spin of a magnetic atom in a semiconductor quantum dot

Nanophotonics ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 75-89 ◽  
Author(s):  
L. Besombes ◽  
H. Boukari ◽  
C. Le Gall ◽  
A. Brunetti ◽  
C.L. Cao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fine Structure ◽  
Solid State ◽  
Laser Field ◽  
Coherent Control ◽  
Spin Dynamics ◽  
Optical Control ◽  
Zero Magnetic Field ◽  
Magnetic Atom ◽  
Resonant Laser

Abstract:The control of single spins in solids is a key but challenging step for any spin-based solid-state quantumcomputing device. Thanks to their expected long coherence time, localized spins on magnetic atoms in a semiconductor host could be an interesting media to store quantum information in the solid state. Optical probing and control of the spin of individual or pairs of Manganese (Mn) atoms (S = 5/2) have been obtained in II-VI and IIIV semiconductor quantum dots during the last years. In this paper, we review recently developed optical control experiments of the spin of an individual Mn atoms in II-VI semiconductor self-assembled or strain-free quantum dots (QDs).We first show that the fine structure of the Mn atom and especially a strained induced magnetic anisotropy is the main parameter controlling the spin memory of the magnetic atom at zero magnetic field. We then demonstrate that the energy of any spin state of a Mn atom or pairs of Mn atom can be independently tuned by using the optical Stark effect induced by a resonant laser field. The strong coupling with the resonant laser field modifies the Mn fine structure and consequently its dynamics.We then describe the spin dynamics of a Mn atom under this strong resonant optical excitation. In addition to standard optical pumping expected for a resonant excitation, we show that the Mn spin population can be trapped in the state which is resonantly excited. This effect is modeled considering the coherent spin dynamics of the coupled electronic and nuclear spin of the Mn atom optically dressed by a resonant laser field. Finally, we discuss the spin dynamics of a Mn atom in strain-free QDs and show that these structures should permit a fast optical coherent control of an individual Mn spin.

Coherent Control of Stress-Induced InGaAs Quantum Dots by Means of Phonon-Assisted Resonant Photoluminescence

2001 ◽  
Vol 224 (2) ◽  
pp. 461-464 ◽  
Author(s):  
A.V. Baranov ◽  
V. Davydov ◽  
A.V. Fedorov ◽  
H.-W. Ren ◽  
S. Sugou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Coherent Control

Multiple Photon Assisted Tunneling between Two Coupled Quantum Dots

1997 ◽  
Vol 36 (Part 1, No. 6B) ◽  
pp. 4000-4003 ◽  
Author(s):  
Toshimasa Fujisawa ◽  
Seigo Tarucha
Keyword(s):  
Quantum Dots ◽  
Coupled Quantum Dots ◽  
Assisted Tunneling

Resonant and phonon-assisted tunneling transport through silicon quantum dots embedded in SiO2

2008 ◽  
Vol 93 (13) ◽  
pp. 132111 ◽  
Author(s):  
B. Berghoff ◽  
S. Suckow ◽  
R. Rölver ◽  
B. Spangenberg ◽  
H. Kurz ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silicon Quantum Dots ◽  
Assisted Tunneling ◽  
Tunneling Transport
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