Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Optics Express

Electromagnetically-induced transparency and slow light in GaAs/AlGaAs multiple quantum wells in a transient regime

Seongmin Ma, Hua Xu, Byoung Seung HAM

Published Aug 6, 2009• 55 citations
Publisher

Abstract

Electromagnetically-induced transparency (EIT) is observed and analyzed for the group velocity of a femtosecond light pulse interacting with GaAs/AlGaAs multiple quantum wells (MQWs) in a transient regime. The calculated slowdown factor of the group velocity inside the medium due to the dynamic refractive index change is approximately 2.10 x 10(3). We discuss the potential of EIT-induced slow light in GaAs/AlGaAs MQWs for ultrafast (approximately 210 GHz) all-optical information processing such as photon routing.

DOI
10.1364/oe.17.014902

Related papers

Slow light via Electromagnetically-Induced Transparency in GaAs Multiple Quantum Wells in a Transient Regime

Seongmin Ma, Hua Xu, Byoung Seung HAM

Slowed group velocity of light in GaAs/AlGaAs multiple quantum wells (MQWs) for ultrafast photonic applications is numerically estimated and discussed using a fourth-order Runge-Kutta method through observed electromagnetically-induced transparency (EIT) in a transient regime.

Advances in Optical Sciences Congress•Jan 1, 2009•0 citations

Electromagnetically induced transparency and slow light in a Λ-type three-level system of GaAs/AlGaAs multiple quantum wells

Wei Yan, T. Wang, X.M. Li +1 more

A Λ-type three-level system of GaAs/AlGaAs multiple quantum wells (MQWs) was constructed by using exciton spin coherence in the transient optical response. Theoretical analysis with density matrix and Maxwell equations then yielded the phase shift, absorption, group velocity and group velocity dispersion. The calculated velocity is ∼6.14 × 104 m/s and the corresponding pulse delay is ∼8 ps. A convenient basis is provided for investigating how many-body effects in semiconductors modify the magnitude, spectral shape, and space and time dependence of the electromagnetically induced transparency phenomenon.

Journal of Modern Optics•Feb 29, 2012•15 citations

Slow light and voltage control of group velocity in resonantly coupled quantum wells

Pavel Ginzburg, Meir Orenstein

We analyze slow light propagation in a coupled semiconductor quantum wells system exhibiting tunneling induced transparency. A group index as high as 85, for simple applicable GaAs/AlGaAs quantum wells structures, is predicted. Using DC voltage, the resonant tunneling rate can be altered and the related group index can be controlled over a broad range.

Optics Express•Jan 1, 2006•29 citations

Analytical Investigation of Slow Light Systems with Strained Quantum Wells Structure under Applied Magnetic and Electric Fields Based on V-type EIT

Saeed Abdolhosseini, Hassan Kaatuzian, Reza Kohandani

In this paper, a slow light device, which is composed of GaAs/AlGaAs [110] strained quantum wells, has been studied to realize V-type electromagnetically induced transparency phenomenon. Influences of applying electric and magnetic fields are investigated theoretically on main properties of the slow light devices, such as slow down factor and refractive index, based on Bloch equations approach. This is the first study of applying external magnetic and electric fields impacts on proposed structure by using V-type electromagnetically induced transparency. By changing the external fields, we are able to modify central frequency of presented structure that provides appropriate conditions in order to be utilized in optical storages, optical buffers and all-optical switches. According to the simulation results, the peak value of slow down factor is estimated to near 5000 when power intensity of pump and signal are 10 kW/cm2 and 0.1 kW/cm2, respectively. With optimization the amount of external fields, the central frequency of system can reach positive shift as high as 1.1 THz and negative shift close to -1.1 THz.

International journal of optics and applications•Apr 1, 2017•0 citations

Slow light with cavity electromagnetically induced transparency

Jiepeng Zhang, Gessler Hernandez, Yifu Zhu

We report an experimental observation of slow light propagation in cold Rb atoms exhibiting cavity electromagnetically induced transparency (EIT). The steep slope of the atomic dispersion manifested by EIT reduces the light group velocity. The cavity filtering and feedback further contribute to the slowdown and delay of the light pulse propagation. A combination of the cavity and the EIT atomic system significantly improves the performance of the slow light propagation. A propagation time delay of approximately 200 ns was observed in the cavity and Rb EIT system, which is approximately 70 times greater than the time delay calculated for the light pulse propagation through the same Rb EIT system without the cavity.

Optics Letters•Dec 19, 2007•81 citations

Electromagnetically Induced Transparency in Semiconductor Quantum Wells

Mark C. Phillips, Hailin Wang

This chapter discusses advantage of the many-body Coulomb interactions to generate and manipulate nonradiative quantum coherences. It describes theoretically, the manifestation and behavior of electromagnetically induced transparency (EIT) processes in transient regimes. The chapter also discusses experimental demonstrations of EIT using excitons in gallium arsenide quantum-well structures. It shows that many-body Coulomb interactions between excitons can be exploited for the generation and manipulation of exciton spin coherence and biexciton coherence. The chapter provides the similarities and especially the essential differences in EIT processes between atomic and excitonic systems. It focuses on the changes in the absorption spectrum induced by EIT; these changes are also accompanied by corresponding changes in the refractive index. The absorption spectrum features a distinct EIT dip similar to that observed for cw excitations. The experimental setup for transient EIT studies was based on a standard transient pump-probe configuration, but with different pump and probe pulse durations.

CRC Press eBooks•Oct 3, 2018•0 citations
Electromagnetically-induced transparency (EIT) is observed and analyzed for the group velocity of a femtosecond light pulse interacting with GaAs/AlGaAs multiple quantum wells (MQWs) in a transient regime. The calculated slowdown factor of the group velocity inside the medium due to the dynamic refractive index change is approximately 2.10 x 10(3). We discuss the potential of EIT-induced slow light in GaAs/AlGaAs MQWs for ultrafast (approximately 210 GHz) all-optical information processing such as photon routing.
A Λ-type three-level system of GaAs/AlGaAs multiple quantum wells (MQWs) was constructed by using exciton spin coherence in the transient optical response. Theoretical analysis with density matrix and Maxwell equations then yielded the phase shift, absorption, group velocity and group velocity dispersion. The calculated velocity is ∼6.14 × 104 m/s and the corresponding pulse delay is ∼8 ps. A convenient basis is provided for investigating how many-body effects in semiconductors modify the magnitude, spectral shape, and space and time dependence of the electromagnetically induced transparency phenomenon.
In this paper, a slow light device, which is composed of GaAs/AlGaAs [110] strained quantum wells, has been studied to realize V-type electromagnetically induced transparency phenomenon. Influences of applying electric and magnetic fields are investigated theoretically on main properties of the slow light devices, such as slow down factor and refractive index, based on Bloch equations approach. This is the first study of applying external magnetic and electric fields impacts on proposed structure by using V-type electromagnetically induced transparency. By changing the external fields, we are able to modify central frequency of presented structure that provides appropriate conditions in order to be utilized in optical storages, optical buffers and all-optical switches. According to the simulation results, the peak value of slow down factor is estimated to near 5000 when power intensity of pump and signal are 10 kW/cm2 and 0.1 kW/cm2, respectively. With optimization the amount of external fields, the central frequency of system can reach positive shift as high as 1.1 THz and negative shift close to -1.1 THz.
We report an experimental observation of slow light propagation in cold Rb atoms exhibiting cavity electromagnetically induced transparency (EIT). The steep slope of the atomic dispersion manifested by EIT reduces the light group velocity. The cavity filtering and feedback further contribute to the slowdown and delay of the light pulse propagation. A combination of the cavity and the EIT atomic system significantly improves the performance of the slow light propagation. A propagation time delay of approximately 200 ns was observed in the cavity and Rb EIT system, which is approximately 70 times greater than the time delay calculated for the light pulse propagation through the same Rb EIT system without the cavity.
This chapter discusses advantage of the many-body Coulomb interactions to generate and manipulate nonradiative quantum coherences. It describes theoretically, the manifestation and behavior of electromagnetically induced transparency (EIT) processes in transient regimes. The chapter also discusses experimental demonstrations of EIT using excitons in gallium arsenide quantum-well structures. It shows that many-body Coulomb interactions between excitons can be exploited for the generation and manipulation of exciton spin coherence and biexciton coherence. The chapter provides the similarities and especially the essential differences in EIT processes between atomic and excitonic systems. It focuses on the changes in the absorption spectrum induced by EIT; these changes are also accompanied by corresponding changes in the refractive index. The absorption spectrum features a distinct EIT dip similar to that observed for cw excitations. The experimental setup for transient EIT studies was based on a standard transient pump-probe configuration, but with different pump and probe pulse durations.