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Multiple quantum well optical modulator structures using surface acoustic wave induced Stark effect

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2 Author(s)
Jain, F.C. ; Dept. of Electr. & Syst. Eng., Connecticut Univ., Storrs, CT, USA ; Bhattacharjee, K.K.

Multiple-quantum-well (MQW) optical modulator structures using the quantum-confined Stark effect (QCSE) manifested by the application of an electric field induced by a propagating surface acoustic wave (SAW) are proposed. The magnitudes of the parallel E/sub /// and perpendicular E/sub perpendicular to / electric-field components are computed to determine the electroabsorption and change of index of refraction for the AlGaAs-GaAs system. The proposed structures are shown to be less cumbersome than conventional p-i-n configurations used to impress E. In addition, an enhanced performance Bragg modulator/switch which utilizes the QCSE as well as the acoustic phase grating produced by the SAW beam is described.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:1 ,  Issue: 10 )