https://doi.org/10.1140/epjb/s10051-023-00635-7
Regular Article - Solid State and Materials
Variation of refractive index of a hydrogenic impurity in a parabolic quantum well
1
Research Center of Physics, Jayaraj Annapackiam College for Women (Autonomous), 625 601, Periyakulam, Theni District, Tamil Nadu, India
2
Affiliated to Mother Teresa Women’s University, 624 101, Kodaikanal, Tamil Nadu, India
Received:
26
August
2023
Accepted:
3
December
2023
Published online:
18
December
2023
In the present work, the variation of refractive index (linear, non-linear and total) of a hydrogenic impurity in a Parabolic Quantum Well (PQW), composed of GaAs/Ga1−xAlxAs, associated with ground and first excited states are theoretically calculated variationally as a function of photon energy, well width and Al concentration. It is observed that (i) linear, non-linear and total refractive index changes (RIC) show less response to incident photon energy beyond 25 meV; (ii) linear RIC is less significant for photon energies < 5 meV and > 25 meV, but non-linear RIC shows a crossover at 5 meV, for all Al concentrations; (iii) linear, non-linear and total RIC shifts towards lower energies as L increases; (iv) all components of RIC show an indifferent behaviour with photon energy for L = 10 nm. These results show that well width, Al concentration and photon energy strongly affect RIC.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. 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.
