https://doi.org/10.1140/epjb/s10051-026-01139-w
Research - Condensed Matter
Structural and field-induced control of optical properties in a novel exponentially bounded cosine quantum well
1
Faculty of Education, Department of Mathematics and Science Education, Sivas Cumhuriyet University, 58140, Sivas, Türkiye
2
Faculty of Science, Physics Department, Sivas Cumhuriyet University, 58140, Sivas, Türkiye
3
Coll Sci Dammam, Basic and Appl Sci Res Ctr BASRC, Nanomat Technol Unit, Imam Abdulrahman Bin Faisal University, POB 1982, 31441, Dammam, Saudi Arabia
4
Coll Sci Girls, Dept Phys, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
5
Sivas Cumhuriyet University Nanophotonics Application and Research Center, 58140, Sivas, Türkiye
a
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Received:
22
December
2025
Accepted:
4
February
2026
Published online:
4
March
2026
Abstract
In this study, we examine the effects of external static electric and magnetic fields, as well as structural parameters (barrier height and base width), on the total optical absorption coefficients and relative refractive index changes in an exponentially bounded cosine quantum well heterostructure. Using the effective mass approximation and a parabolic conduction band, by applying the diagonalization method to the time-independent Schrödinger equation, both the subband energy levels and wave functions are determined. Optical coefficients are then calculated using analytical expressions from the compact density matrix formalism. Results show that increasing electric and magnetic field strengths leads to a blue shift in the resonance peaks of both optical absorption and refractive index change. Furthermore, higher potential barriers cause a blue shift, while wider barrier bases result in a red shift. These findings highlight the tunability of optical properties through external fields and structural design, offering potential for advanced optoelectronic applications.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
