Electric field induced optical absorption and refractive index changes in a diluted magnetic quantum well

In this work, the optical absorption coefficients and the refractive index changes for the infinite and finite semi-parabolic quantum well are calculated. Numerical calculations are performed for typical GaAs / Al x Ga 1-x As semi-parabolic quantum well. The energy eigenvalues and eigenfunctions of these systems are calculated numerically. Optical properties are obtained using the compact density matrix approach. Results show that the energy eigenvalues and the matrix elements of the infinite and finite cases are different. The calculations reveal that the resonant peaks of the optical properties of the finite case occur at lower values of the incident photon energy with respect to the infinite case. Results indicate that the maximum value of the refractive index changes for the finite case are greater than that of the infinite case. Our calculations also show that in contrast to the infinite case, the resonant peak value of the total absorption coefficient in the case of the finite well is a non-monotonic function of the semi-parabolic confinement frequency.

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Calculation of linear and nonlinear intersubband refractive-index changes in an asymmetrical semiparabolic quantum well with applied electric field

physica status solidi (b) ◽

10.1002/pssb.200402130 ◽

2005 ◽

Vol 242 (5) ◽

pp. 1001-1009 ◽

Cited By ~ 6

Author(s):

Li Zhang ◽

Jun-jie Shi

Keyword(s):

Refractive Index ◽

Electric Field ◽

Quantum Well ◽

Applied Electric Field ◽

Index Changes ◽

Linear And Nonlinear

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Intersubband optical absorption coefficients and refractive index changes in a graded quantum well under intense laser field: Effects of hydrostatic pressure, temperature and electric field

Physica B Condensed Matter ◽

10.1016/j.physb.2013.10.053 ◽

2014 ◽

Vol 434 ◽

pp. 26-31 ◽

Cited By ~ 24

Author(s):

F. Ungan ◽

R.L. Restrepo ◽

M.E. Mora-Ramos ◽

A.L. Morales ◽

C.A. Duque

Keyword(s):

Refractive Index ◽

Hydrostatic Pressure ◽

Optical Absorption ◽

Electric Field ◽

Laser Field ◽

Intense Laser ◽

Absorption Coefficients ◽

Intense Laser Field ◽

Index Changes ◽

Intersubband Optical Absorption

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Intersubband optical absorption coefficients and refractive index changes in modulation-doped asymmetric double quantum well

Solid State Communications ◽

10.1016/j.ssc.2011.07.011 ◽

2011 ◽

Vol 151 (20) ◽

pp. 1415-1419 ◽

Cited By ~ 26

Author(s):

F. Ungan ◽

E. Kasapoglu ◽

I. Sokmen

Keyword(s):

Refractive Index ◽

Optical Absorption ◽

Quantum Well ◽

Double Quantum ◽

Absorption Coefficients ◽

Double Quantum Well ◽

Index Changes ◽

Intersubband Optical Absorption

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Refractive index changes in constant total effective length GaN/AlN multiple quantum well systems under external electric field

International Journal of Modern Physics B ◽

10.1142/s021797921450204x ◽

2014 ◽

Vol 28 (29) ◽

pp. 1450204 ◽

Cited By ~ 7

Author(s):

M. Solaimani

Keyword(s):

Refractive Index ◽

Electric Field ◽

Quantum Well ◽

External Electric Field ◽

Energy Levels ◽

Multiple Quantum Well ◽

Oscillatory Behavior ◽

Effective Length ◽

Multiple Quantum ◽

Index Changes

In this work we have investigated the effect of external electric field on the electronic structure and refractive index changes of a GaN/AlN constant total effective length multiple quantum well. A decreasing oscillatory behavior for energy levels was seen when the electric field increased and in some energy values the energy levels intersected. By increasing the number of wells, oscillator strength dropped suddenly and moved to higher electric field in a critical electric field. By using the number of wells and the total length of the structure as two tuning tools, we were able to select our previously determined critical electric field.

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The linear and nonlinear intersubband optical absorption coefficients and refractive index changes in a V-shaped quantum well under the applied electric and magnetic fields

Superlattices and Microstructures ◽

10.1016/j.spmi.2011.08.002 ◽

2011 ◽

Vol 50 (4) ◽

pp. 400-410 ◽

Cited By ~ 40

Author(s):

U. Yesilgul ◽

F. Ungan ◽

E. Kasapoglu ◽

H. Sarı ◽

I. Sökmen

Keyword(s):

Refractive Index ◽

Magnetic Fields ◽

Optical Absorption ◽

Quantum Well ◽

Absorption Coefficients ◽

Electric And Magnetic Fields ◽

Index Changes ◽

Linear And Nonlinear ◽

Intersubband Optical Absorption

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Effects of Spin Orbit Interaction on Optical Properties for Quantum Dot and Quantum Wire

Sustainable Nanosystems Development, Properties, and Applications - Advances in Chemical and Materials Engineering ◽

10.4018/978-1-5225-0492-4.ch008 ◽

2017 ◽

pp. 237-260

Author(s):

Manoj Kumar ◽

Pradip Kumar Jha ◽

Aranya B. Bhattacherjee

Keyword(s):

Magnetic Field ◽

Refractive Index ◽

Optical Absorption ◽

Electric Field ◽

Quantum Wire ◽

Orbit Interaction ◽

Spin Orbit ◽

Spin Orbit Interaction ◽

Rashba Spin ◽

Index Changes

Here, the influence of external magnetic field on the optical absorption and refractive index changes for a parabolically confined quantum dot in the presence of Rashba spin orbit interaction have been investigated. The results are presented as a function of quantum confinement potential, magnetic field, Rashba spin orbit interaction strength and photon energy. Our results indicate the important influence of magnetic field on the peak positions of absorption coefficient and refractive index changes. For Quantum Wire, the energy dispersion relations are studied of the spin split subbands subjected to external transverse electric and magnetic fields in the presence of Rashba spin orbit interaction. For an infinite superlattice wire, it is found that the energy gaps between different subbands are shifted due to Rashba spin orbit interaction and external electric field. Here we have also investigated the influence of external electric field and magnetic field on the optical absorption of a parabolic confinement wire.

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