Intense acoustic beams for photonic modulation

Mauricio M. de Lima Jr.; Juana Camacho; Werner Seidel; Helmar Kostial; Paulo V. Santos

doi:10.1117/12.545590

15 September 2004 Intense acoustic beams for photonic modulation

Mauricio M. de Lima Jr., Juana Camacho, Werner Seidel, Helmar Kostial, Paulo V. Santos

Proceedings Volume 5450, Photonic Crystal Materials and Nanostructures; (2004) https://doi.org/10.1117/12.545590
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

We report on the generation of strong surface acoustic wave (SAW) beams on GaAs substrates as well as on their concentration and guiding using acoustic horns and waveguides (WGs). By means of focusing interdigital transducers, we demonstrate the generation of narrow (full width at half maximum of approximately 15 μm), high-frequency (0.5 GHz) SAW beams collimated over distances exceeding 100 μm. The beams can be guided along the surface using narrow (10-μm-wide) WGs of ridge and slot types. The coupling of the SAW into the WGs was achieved using acoustic horns. Coupling power efficiencies of up to 75%, which translates into an eightfold increase of the local acoustic power density within the WG, is demonstrated using slot WGs with a 80-nm-thick aluminum cladding region.

Citation Download Citation

Mauricio M. de Lima Jr., Juana Camacho, Werner Seidel, Helmar Kostial, and Paulo V. Santos "Intense acoustic beams for photonic modulation", Proc. SPIE 5450, Photonic Crystal Materials and Nanostructures, (15 September 2004); https://doi.org/10.1117/12.545590

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