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

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.

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.

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

Doubly dressed states in a ladder-type system with electromagnetically induced transparency

2007 ◽  
Vol 76 (5) ◽  
Author(s):  
Ray-Yuan Chang ◽  
Wei-Chia Fang ◽  
Zong-Syun He ◽  
Bai-Cian Ke ◽  
Pei-Ning Chen ◽  
...  
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Type System ◽  
Dressed States ◽  
Induced Transparency

scholarly journals A Comparative Study of Optical Bistability in Three-Level EIT Configurations

2018 ◽  
Vol 28 (2) ◽  
pp. 127
Author(s):  
Doai Van Le ◽  
Phuong Thi Minh Le ◽  
Anh Tuan Nguyen ◽  
Son Hoai Doan ◽  
Khoa Xuan Dinh ◽  
...  
Keyword(s):  
Comparative Study ◽  
Optical Bistability ◽  
Electromagnetically Induced Transparency ◽  
Type System ◽  
Analytical Form ◽  
Physical Parameters ◽  
Threshold Intensity ◽  
Steady Regime ◽  
Analytical Result ◽  
Induced Transparency

We present a comparative study of optical bistability (OB) in three-level atomic configurations, including $\Lambda $-, cascade-, and V- types under the conditions of electromagnetically induced transparency (EIT). In the steady regime, the input-output intensity relations for the OB in each configuration have been derived in analytical form. The model allows one to construct a clear picture on how the threshold intensity, and other characteristics of the OB are continuously modified with respects to controllable parameters of the laser fields, cooperation parameter, and other physical parameters of atomic system. The results showed that the threshold intensity of OB in \(\Lambda \)-type system is much less than the other ones and the threshold intensity of OB in V-type system is the largest one. The analytical result is convenient to choose excitation configuration for experimental observations and related applications in photonic devices.

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