Electromagnetically induced transparency in a rectangular quantum dot on a single electron

2019 ◽  
Vol 17 (2) ◽  
pp. 131-144
Author(s):  
Vladan Pavlovic ◽  
Zeljko Laic ◽  
Ljiljana Stevanovic ◽  
Nikola Filipovic
Keyword(s):  
Quantum Dot ◽  
Electromagnetically Induced Transparency ◽  
Relaxation Mechanism ◽  
Single Electron ◽  
Cryogenic Temperatures ◽  
Matrix Elements ◽  
Probe Field ◽  
And Control ◽  
Induced Transparency ◽  
Dephasing Rate

In this paper, we investigated the realization of electromagnetically induced transparency (EIT) in a rectangular quantum dot (QD) with a single electron in the presence of probe and control laser fields. The lowest three levels of the confined electron that form ladder and V configuration were chosen. We discussed the dependence of density matrix elements for ladder configuration and for V configuration on detunings of the probe field for various values of quantum dot dimensions. This dependence is discussed for both cases, at cryogenic temperatures when spontaneous emission dominates the relaxation mechanism and at room or higher temperatures when dephasing rate cannot be neglected.

scholarly journals Study of Atomic Populations, Electromagnetically Induced Transparency, and Dispersive Signals in a λ-Type System Under Various Decoherence Effects

2019 ◽  
Vol 64 (3) ◽  
pp. 197
Author(s):  
R. Hazra ◽  
Md.M. Hossain
Keyword(s):  
Excited States ◽  
Electromagnetically Induced Transparency ◽  
Energy Levels ◽  
Type System ◽  
Field Approximation ◽  
Peak Height ◽  
Probe Field ◽  
Set Up ◽  
Induced Transparency ◽  
Atomic Populations

We have theoretically studied the atomic populations, electromagnetically induced transparency (EIT), and dispersion in a three-level Λ-type system. The density matrix equations are set up with regard for the relaxation of populations of the ground states, and the optical Bloch equations are solved analytically in the weak probe field approximation. Decoherence effects in the ground and excited states on the EIT line shape and dispersive signals are studied, and it is found that the EIT line width increases and the peak height decreases, as the decoherence rates increase in the ground and excited states. On the other hand, we have observed that the dispersive signals are steeper and of high contrast for the lower decoherence rates in the ground and excited states. We have also analyzed the variations of atomic populations of the energy levels at the pump Rabi frequency, as well as the decoherence rate in the ground state.

The Regulation and Control of Electromagnetically Induced Transparency and Absorption in an Optical-radio Two-photon Coupling Configuration

2017 ◽  
Vol 46 (6) ◽  
pp. 626001
Author(s):  
张玮峰 ZHANG Wei-feng ◽  
苑青 YUAN Qing ◽  
李晓莉 LI Xiao-li ◽  
尚雅轩 SHANG Ya-xuan ◽  
张连水 ZHANG Lian-shui
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Two Photon ◽  
And Control ◽  
Induced Transparency ◽  
Photon Coupling

Controlling Optical Storage in Semiconductor Quantum Dot Electromagnetically Induced Transparency by Phonon-Assisted Transition

2017 ◽  
Vol 54 (8) ◽  
pp. 082701
Author(s):  
黎方名 Li Fangming ◽  
王登龙 Wang Denglong ◽  
佘彦超 She Yanchao ◽  
丁建文 Ding Jianwen ◽  
肖思国 Xiao Siguo
Keyword(s):  
Quantum Dot ◽  
Electromagnetically Induced Transparency ◽  
Optical Storage ◽  
Semiconductor Quantum Dot ◽  
Induced Transparency

Electromagnetically induced transparency in a multilayered spherical quantum dot with hydrogenic impurity

2018 ◽  
Vol 78 ◽  
pp. 191-200 ◽  
Author(s):  
Vladan Pavlović ◽  
Marko Šušnjar ◽  
Katarina Petrović ◽  
Ljiljana Stevanović
Keyword(s):  
Quantum Dot ◽  
Electromagnetically Induced Transparency ◽  
Hydrogenic Impurity ◽  
Spherical Quantum Dot ◽  
Induced Transparency

CONTROLLABILITY OF ELECTROMAGNETICALLY INDUCED TRANSPARENCY IN A DOPPLER BROADENED FOUR-LEVEL ATOMIC SYSTEM

2013 ◽  
Vol 27 (11) ◽  
pp. 1350037 ◽  
Author(s):  
SOMIA ABD-ELNABI ◽  
K. I. OSMAN
Keyword(s):  
Density Matrix ◽  
Electromagnetic Fields ◽  
Atomic System ◽  
Electromagnetically Induced Transparency ◽  
Experimental Results ◽  
Doppler Broadening ◽  
Matrix Elements ◽  
Nonradiative Decay ◽  
Induced Transparency ◽  
Good Agreement

The influence of Doppler broadening on a four-level N-type atomic system has been investigated in the presence of spontaneous generating coherence. The atomic system interacting with three electromagnetic fields and includes the nonradiative decay, the effect of co- and counter-propagation of the fields is considered. The probe susceptibility behaviors can be modified by Doppler broadening via nonperturbative treatments of the density matrix elements solution in the absence and presence of the spontaneous generating coherence. Some interesting features are enhanced for the spectral behaviors and controllability of electromagnetically induced transparency, which were found to be in good agreement to some experimental results without including Zeeman sublevels to the system.

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