Note On The Optical Oscillator Strength Of Microscopic Superlattices As Optically Active Parts Of Devices

Shigetoshi Nara

doi:10.1117/12.943411

16 May 1988 Note On The Optical Oscillator Strength Of Microscopic Superlattices As Optically Active Parts Of Devices

Shigetoshi Nara

Proceedings Volume 0861, Quantum Wells and Superlattices in Optoelectronic Devices and Integrated Optics; (1988) https://doi.org/10.1117/12.943411
Event: 1987 Symposium on the Technologies for Optoelectronics, 1987, Cannes, France

Abstract

The optical oscillator strengths between valence bands and conduction band minmum in (GaAs)(AlAs)n, (GaAs)n/(AlAs)i and (GaAs)i/(AlAs)n (n =1≈10) superlattices are estimated by means of an improved tight binding method in which the overlap integrals up to the second nearest neighbor atoms, including new parameters, are explicitly taken into account. Kroemer's rule of band offset values is employed in order to investigate the influence of tetragonality of [001] superlattice structure on the optical polarizations of oscillator strength with and without the existence of spin-orbit interactions. It is indicated that the superlattices allow us to tailor band structure. The examples studied here show that this tailoring can result in a considerable sacrifice of optical oscillator strength. However the possibility remains of designing another superlattice structures without sacrifice of oscillator strength.

Citation Download Citation

Shigetoshi Nara "Note On The Optical Oscillator Strength Of Microscopic Superlattices As Optically Active Parts Of Devices", Proc. SPIE 0861, Quantum Wells and Superlattices in Optoelectronic Devices and Integrated Optics, (16 May 1988); https://doi.org/10.1117/12.943411

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