scholarly journals Electromagnetically induced transparency of charge pumping in a triple-quantum-dots with Λ-type level structure

2013 ◽  
Vol 102 (16) ◽  
pp. 163116 ◽  
Author(s):  
Chun Guan ◽  
Yunhui Xing ◽  
Chao Zhang ◽  
Zhongshui Ma
Keyword(s):  
Quantum Dots ◽  
Electromagnetically Induced Transparency ◽  
Level Structure ◽  
Charge Pumping ◽  
Triple Quantum Dots ◽  
Induced Transparency

Electromagnetically induced transparency-like exciton nonlinear absorption in quantum dots

2004 ◽  
Author(s):  
Hideki Gotoh ◽  
Hidehiko Kamada ◽  
Tadashi Saitoh ◽  
Hiroaki Ando ◽  
Jiro Temmyo
Keyword(s):  
Quantum Dots ◽  
Nonlinear Absorption ◽  
Electromagnetically Induced Transparency ◽  
Induced Transparency

scholarly journals Electromagnetically induced transparency with Rydberg atoms across the Breit-Rabi regime

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Julian Naber ◽  
Atreju Tauschinsky ◽  
Ben van Linden van den Heuvell ◽  
Robert Spreeuw
Keyword(s):  
Magnetic Fields ◽  
Electromagnetically Induced Transparency ◽  
Level Structure ◽  
Laser Beams ◽  
Optical Bloch Equations ◽  
Angular Momenta ◽  
Low Field ◽  
Multi Level ◽  
Atomic States ◽  
Induced Transparency

We present experimental results on the influence of magnetic fields and laser polarization on electromagnetically induced transparency (EIT) using Rydberg levels of ^{87}87Rb atoms. The measurements are performed in a room temperature vapor cell with two counter-propagating laser beams at 480 m and 780 m in a ladder-type energy level scheme. We measure the EIT spectrum of a range of ns_{1/2}ns1/2 Rydberg states for n=19-27n=19−27, where the hyperfine structure can still be resolved. Our measurements span the range of magnetic fields from the low field linear Zeeman regime to the high field Paschen-Back regimes. The observed spectra are very sensitive to small changes in magnetic fields and the polarization of the laser beams. We model our observations using optical Bloch equations that take into account the full multi-level structure of the atomic states involved and the decoupling of the electronic JJ and nuclear II angular momenta in the Breit-Rabi regime. The numerical model yields excellent agreement with the observations. In addition to EIT related experiments, our results are relevant for experiments involving coherent excitation to Rydberg levels in the presence of magnetic fields.

Binding Energy And Absorption of Donor Impurity In Spherical GaAs/AlxGa1-x As Quantum Dots With Konwent Potential

2021 ◽  
Author(s):  
E. B. Al ◽  
E. Kasapoglu ◽  
H. Sari ◽  
I. Sökmen ◽  
C. A. Duque
Keyword(s):  
Quantum Dots ◽  
Binding Energy ◽  
Electromagnetically Induced Transparency ◽  
Shallow Donor ◽  
Donor Impurity ◽  
Eigenvalues And Eigenfunctions ◽  
Different Types ◽  
Matrix Expansion ◽  
Diagonalization Method ◽  
Induced Transparency

Abstract In this study, the electronic and optical properties of single or core/shell quantum dots, which are formed depending on the parameters in the selected Konwent potential, are investigated. Namely, the effects of the size and geometric shapes of quantum dots on the binding energy of the on-center donor impurity, the total absorption coefficient and refractive index which are including transitions between the some confined states, and the electromagnetically induced transparency between the lowest six confined states related to the donor impurity are investigated. We have used the diagonalization method by choosing a wave function based on the Bessel and Spherical Harmonics orthonormal function to find the eigenvalues and eigenfunctions of the electron confined within the quantum dots which have different types mentioned above. To calculate the optical absorption coefficients and electromagnetically induced transparency related to shallow-donor impurity, a two- and three-level approach in the density matrix expansion is used, respectively.

The effect of spherical metallic nanoparticles on electromagnetically induced transparency in spherical quantum dots

2016 ◽  
Vol 30 (25) ◽  
pp. 1650215 ◽  
Author(s):  
A. Asgharinejad ◽  
H. R. Askari
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Effective Mass ◽  
Metallic Nanoparticles ◽  
Schrodinger Equation ◽  
Electromagnetically Induced Transparency ◽  
Metallic Nanoparticle ◽  
Central Potential ◽  
Spherical Quantum Dot ◽  
Induced Transparency

In this paper, electromagnetically induced transparency (EIT) is investigated in a GaAs spherical quantum dot (SQD) with central potential in presence of spherical metallic nanoparticle (SMNP). Solving the Schrödinger equation in effective mass, eigenfunctions and eigenvalues of SQD are obtained. By using the obtained eigenfunctions and eigenvalues, the susceptibility of SQD is found. In addition, dependence of EIT on radius of SQD and SMNP, distance between SMNP and SQD and Rabi and probe frequencies are investigated.

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