Light propagation, optical modulation, and beam steering in waveguides with quantum well voltage tunable claddings

We present results on devices fabricated in a waveguide system utilizing a voltage tunable quantum well cladding layer. A (GaAs/AlGaAs) beam steering device produced an angular shift of 2.4° under an applied voltage of 20 V. It is shown numerically that electro-optic modulators fabricated in such a...

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Bibliographic Details
Published in:Applied physics letters 1995-01, Vol.66 (5), p.541-543, Article 541
Main Authors: Harwit, Alex, Fernandez, R., Kinell, D. K., Eades, W. D.
Format: Article
Language:English
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Summary:We present results on devices fabricated in a waveguide system utilizing a voltage tunable quantum well cladding layer. A (GaAs/AlGaAs) beam steering device produced an angular shift of 2.4° under an applied voltage of 20 V. It is shown numerically that electro-optic modulators fabricated in such a material configuration can have simultaneously improved contrast ratios and insertion losses if the ratio of light propagating in the cladding and in the core regions can be controlled. A proof of concept device is demonstrated in which an electric field is used to change the distribution of light propagating in the waveguide.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.114006