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Variation of refractive index of a hydrogenic impurity in a parabolic quantum well

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  • S. Ramyapriya

    (Jayaraj Annapackiam College for Women (Autonomous)
    Affiliated to Mother Teresa Women’s University)

  • M. Arulmozhi

    (Jayaraj Annapackiam College for Women (Autonomous)
    Affiliated to Mother Teresa Women’s University)

Abstract

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 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. Graphical abstract Total refractive index changes of a hydrogenic donor in a PQW as a function of photon energy for various values of Al concentrations (x) for L = 30 nm

Suggested Citation

  • S. Ramyapriya & M. Arulmozhi, 2023. "Variation of refractive index of a hydrogenic impurity in a parabolic quantum well," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 96(12), pages 1-7, December.
    • Handle: RePEc:spr:eurphb:v:96:y:2023:i:12:d:10.1140_epjb_s10051-023-00635-7
    DOI: 10.1140/epjb/s10051-023-00635-7
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    References listed on IDEAS

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    1. K. Mathan Kumar & A. John Peter & C. Lee, 2011. "Optical absorption and refraction index change of a confined exciton in a spherical quantum dot nanostructure," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 84(3), pages 431-438, December.
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