Simultaneous observations of electromagnetically induced transparency (EIT) and absorption (EIA) in a multi-level V-type system of 87Rb and theoretical simulation of the observed spectra using a multi-mode approach

2016 ◽  
Vol 145 (22) ◽  
pp. 224312 ◽  
Author(s):  
Bankim Chandra Das ◽  
Dipankar Bhattacharyya ◽  
Arpita Das ◽  
Shrabana Chakrabarti ◽  
Sankar De
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Type System ◽  
Theoretical Simulation ◽  
Multi Level ◽  
Induced Transparency ◽  
Multi Mode

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.

scholarly journals Multiple electromagnetically-induced transparency of hyperfine levels in cesium 6S1/2 -6P3/2 -8S1/2 ladder-type system

2011 ◽  
Vol 60 (11) ◽  
pp. 114207
Author(s):  
Yang Bao-Dong ◽  
Gao Jing ◽  
Wang Jie ◽  
Zhang Tian-Cai ◽  
Wang Jun-Min
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Type System ◽  
Induced Transparency

Ultra-Broadband Electromagnetically induced Transparency in Metamaterial Based on Conductive Coupling

2021 ◽  
Author(s):  
Tiantian Zheng ◽  
Zhongyin Xiao ◽  
Mingming Chen ◽  
Xiang Miao ◽  
Xiaoyu Wang
Keyword(s):  
Slow Light ◽  
Electromagnetically Induced Transparency ◽  
Type System ◽  
Surface Current ◽  
Wide Band ◽  
Light Filter ◽  
Ring Resonators ◽  
Linear Optics ◽  
Dark Mode ◽  
Induced Transparency

Abstract In this paper, a structure comprising a horizontal metal strip resonator(SR) and four C-shape ring resonators(CRRs) is proposed, obtaining a broadband electromagnetically induced transparency-like(EIT-like) effect. The SR and CRRs are classified into bright mode and dark mode depending on whether they can be directly excited by the incident electromagnetic wave. The three-level Λ -type system and electric field are used to explain the mechanism of EIT-like effect. Meanwhile, by decreasing the distance between SR and CRRs, a transparency window of 1.4THz with relative bandwidth of 91.93% is observed. It is found that when the bright and dark mode are directly contacted, the EIT window increases rapidly via conductive coupling, which can be explained by the surface current. Our work provides a new method for wide band EIT-like effect, which has certain value in the field of slow light, filter and non-linear optics.

Higher order nonlinearities in a non-Doppler free geometryThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

2009 ◽  
Vol 87 (7) ◽  
pp. 843-850 ◽  
Author(s):  
Andal Narayanan ◽  
Archana Sharma ◽  
T. M. Preethi ◽  
H. Abheera ◽  
Hema Ramachandran
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Level Density ◽  
Kerr Nonlinearity ◽  
Low Light ◽  
Atomic Systems ◽  
Fourth Level ◽  
All Optical ◽  
Multi Level ◽  
Induced Transparency ◽  
Photon Resonance

Multi-level gaseous atomic systems showing electromagnetically induced transparency (EIT) phenomenon also exhibit low light intensity nonlinear optical phenomena. This is primarily due to the supression of linear susceptibility for the probe light during EIT. Therefore under EIT, nonlinear interactions become appreciable even at very low light intensities. In particular, Kerr nonlinearity in N systems irradiated by three fields has been both experimentally and theoretically investigated. In this paper, we report an all optical observation of an absorptive three-photon resonance feature, of subnatural width, in a N level scheme of gaseous rubidium, at room temperature, in a novel geometry of three independent beams. The non-Doppler free configuration of the beam in which the absorption is seen is the first such feature reported in a beam that is not directly taking part in the transparency effect. We have demonstrated the velocity selective nature of this absorption and studied the contrast dependence on detuning from the fourth level. Density matrix calculations have been carried out for this geometry, the results of which are in qualitative agreement with the experiment.

Interference of a Narrowband Biphoton with Double Electromagnetically Induced Transparency in an N-Type System

2012 ◽  
Vol 29 (4) ◽  
pp. 044202 ◽  
Author(s):  
Peng Chen ◽  
Jun Qian ◽  
Dong-Yuan Chen ◽  
Zheng-Feng Hu ◽  
Yu-Zhu Wang
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Type System ◽  
Induced Transparency
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