This article is cited in 9 papers

Slowing of light

Theoretical analysis of multiple quantum-well, slow-light devices under applied external fields using a fully analytical model in fractional dimension

R. Kohandani, H. Kaatuzian

Photonics Research Laboratory, Electrical Engineering Department, AmirKabir University of Technology, Iran

Abstract: We report a theoretical study of optical properties of AlGaAs/GaAs multiple quantum-well (MQW), slow-light devices based on excitonic population oscillations under applied external magnetic and electric fields using an analytical model for complex dielectric constant of Wannier excitons in fractional dimension. The results are shown for quantum wells (QWs) of different width. The significant characteristics of the exciton in QWs such as exciton energy and exciton oscillator strength (EOS) can be varied by application of external magnetic and electric fields. It is found that a higher bandwidth and an appropriate slow-down factor (SDF) can be achieved by changing the QW width during the fabrication process and by applying magnetic and electric fields during device functioning, respectively. It is shown that a SDF of 10⁵ is obtained at best.

Keywords: multiple quantum well; coherent population oscillations; magnetic and electric field; fractional dimension.

PACS: 42.50.-p, 78.67.De

Received: 24.06.2014
Revised: 12.08.2014

 English version: Quantum Electronics, 2015, 45:1, 89–94

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