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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 7 — Apr. 1, 2013
  • pp: 1037–1039

Guided-wave electro-optic characterization of BaTiO3 thin films using the prism coupling technique

Floriane Leroy, Anthony Rousseau, Sandrine Payan, Elhadj Dogheche, David Jenkins, Didier Decoster, and Mario Maglione  »View Author Affiliations


Optics Letters, Vol. 38, Issue 7, pp. 1037-1039 (2013)
http://dx.doi.org/10.1364/OL.38.001037


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Abstract

Ferroelectric BaTiO3 (BTO) thin films are grown by RF sputtering onto an indium tin oxide bottom electrode on a MgO single-crystal substrate. We have studied here the optical properties by the prism coupling technique. We report the ordinary and extraordinary refractive indices of the films, the film thickness, and the optical losses that are obtained on the planar waveguides: n0=2.224±0.001 and ne=2.219±0.001 at 1539 nm. Furthermore, in order to demonstrate the active property of the BTO films, we have investigated the electro-optic (EO) properties by using the change of the resonant coupling angle (variation of fundamental TE0 guided mode) when the transverse electric field is applied. The latter is induced by the refractive index variation (Δn) caused by the EO effect when a static electric field is applied transversely to the film. The EO coefficient obtain is about 18pm/V for TE mode and 23pm/V for TM modes at 1539 nm. This value illustrates the suitability of the BTO material thin film with a polycrystalline structure for applications such as modulations, switching, and interconnections.

© 2013 Optical Society of America

OCIS Codes
(160.2100) Materials : Electro-optical materials
(310.2790) Thin films : Guided waves
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Thin Films

History
Original Manuscript: January 21, 2013
Revised Manuscript: February 23, 2013
Manuscript Accepted: February 23, 2013
Published: March 20, 2013

Citation
Floriane Leroy, Anthony Rousseau, Sandrine Payan, Elhadj Dogheche, David Jenkins, Didier Decoster, and Mario Maglione, "Guided-wave electro-optic characterization of BaTiO3 thin films using the prism coupling technique," Opt. Lett. 38, 1037-1039 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-7-1037


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