Next Article in Journal
Functionalized Cellulose Nanocrystal Nanocomposite Membranes with Controlled Interfacial Transport for Improved Reverse Osmosis Performance
Next Article in Special Issue
Selected Organometallic Compounds for Third Order Nonlinear Optical Application
Previous Article in Journal
Titania Nanotubes/Hydroxyapatite Nanocomposites Produced with the Use of the Atomic Layer Deposition Technique: Estimation of Bioactivity and Nanomechanical Properties
Previous Article in Special Issue
Plasmonic Nanoparticles Driven Enhanced Light Amplification in a Local 2D and 3D Self-Assembly
Article

Linear and Nonlinear Intersubband Optical Properties of Direct Band Gap GeSn Quantum Dots

1
Micro-Optoelectronic and Nanostructures Laboratory, Faculty of Sciences, University of Monastir, Monastir 5019, Tunisia
2
CNRS, LTM, CEA-Leti, University Grenoble Alpes, 38054 Grenoble CEDEX 9, France
3
Department of Physics and Astronomy, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(1), 124; https://doi.org/10.3390/nano9010124
Received: 2 January 2019 / Revised: 11 January 2019 / Accepted: 15 January 2019 / Published: 19 January 2019
(This article belongs to the Special Issue Non-Linear Optical Effects in Nanomaterials)
Intersubband optical transitions, refractive index changes, and absorption coefficients are numerically driven for direct bandgap strained GeSn/Ge quantum dots. The linear, third-order nonlinear and total, absorption coefficients and refractive index changes are evaluated over useful dot sizes’ range ensuring p-like Γ-electron energy state to be lower than s-like L-electron energy state. The results show strong dependence of the total absorption coefficient and refractive index changes on the quantum dot sizes. The third order nonlinear contribution is found to be sensitive to the incident light intensity affecting both total absorption coefficient and refractive index changes, especially for larger dot sizes. View Full-Text
Keywords: GeSn; quantum dot; direct band gap; intersubband nonlinear optics; absorption coefficients; refractive index changes GeSn; quantum dot; direct band gap; intersubband nonlinear optics; absorption coefficients; refractive index changes
Show Figures

Figure 1

MDPI and ACS Style

Baira, M.; Salem, B.; Madhar, N.A.; Ilahi, B. Linear and Nonlinear Intersubband Optical Properties of Direct Band Gap GeSn Quantum Dots. Nanomaterials 2019, 9, 124. https://doi.org/10.3390/nano9010124

AMA Style

Baira M, Salem B, Madhar NA, Ilahi B. Linear and Nonlinear Intersubband Optical Properties of Direct Band Gap GeSn Quantum Dots. Nanomaterials. 2019; 9(1):124. https://doi.org/10.3390/nano9010124

Chicago/Turabian Style

Baira, Mourad, Bassem Salem, Niyaz A. Madhar, and Bouraoui Ilahi. 2019. "Linear and Nonlinear Intersubband Optical Properties of Direct Band Gap GeSn Quantum Dots" Nanomaterials 9, no. 1: 124. https://doi.org/10.3390/nano9010124

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop