Hybrid optical modulator based on surface acoustic waves fabricated using imprint lithography and the epitaxial lift-off technique
| Autor: | Yukihiko Takagaki, M. Ramsteiner, E. Wiebicke, Rudolf Hey, A. Riedel, H. Kostial, K. H. Ploog |
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| Rok vydání: | 2003 |
| Předmět: |
Photoluminescence
Materials science business.industry Scattering Physics::Optics Heterojunction Acoustic wave Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Piezoelectricity Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Optics Optical modulator Materials Chemistry Electrical and Electronic Engineering business Lithography Quantum well |
| Zdroj: | Semiconductor Science and Technology. 18:807-811 |
| ISSN: | 1361-6641 0268-1242 |
| Popis: | We utilize imprint lithography and the epitaxial lift-off technique to fabricate devices in which the photoluminescence (PL) is modulated under irradiation of surface acoustic waves (SAWs). Imprint lithography provides short-wavelength SAW transducers on LiNbO3. A high-quality GaAs–(Al,Ga)As quantum well is bonded in front of the transducers using the epitaxial lift-off technique. The large electromechanical coupling in LiNbO3 enables us to manipulate the carrier dynamics in the quantum well through the SAW-induced piezoelectric fields far more effectively than with transducers prepared directly on GaAs. The influences of the scattering of the SAWs from imperfections in the bonded film are investigated by measuring the quenching of the quantum-well emission by micro-PL. |
| Databáze: | OpenAIRE |
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