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Proceedings Paper

Non-Ideal Quantum Well Structures
Author(s): B. S. V. Gopalam
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Paper Abstract

he optical gain and quality of the light emitted in a quantum well structure are analysed in the presence of (a) optical, electrical and thermal couplings between adjacent wells, (b) tunnel leakage, (c) non-radiative and radiative interface recombinations, (d) lattice mismatch, (e) inhomogenity of the layers, (f) ratio of the width of the well to that of the barrier and (g) number of wells. It is felt that the thermalisation of the carriers through collisions with phonons is not necessarily an advantageous feature. Instead several alternatives like (i) mixed electrical and optical pumping mode techniques, (ii) creation of some metastable levels in the wells, (iii) longitudinal magnetic focussing or transverse magnetic deflection and (iv) several other junction pairs starting from GaAs/AlGaAs are discussed for illustrative purposes. Upconversion and mixing frequency techniques can be developed by impregnating barrier/well materials with slight additions of luminiphors as impurities.

Paper Details

Date Published: 11 August 1987
PDF: 28 pages
Proc. SPIE 0792, Quantum Well and Superlattice Physics, (11 August 1987); doi: 10.1117/12.940850
Show Author Affiliations
B. S. V. Gopalam, Indian Institute of Technology (India)


Published in SPIE Proceedings Vol. 0792:
Quantum Well and Superlattice Physics
Gottfried H. Doehler; Joel N. Schulman, Editor(s)

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