Event 

Title:
Seminars at the Accelerator-Fabrication of waveguides in LiTaO3 by irradiation with swift heavy ion
When:
20.11.2014 - 20.11.2014
Where:
CMAM - Madrid
Category:
Informal seminars at the Accelerator

Description

Speaker: Victoria Tormo, CMAM

Title: Fabrication of waveguides in LiTaO3 by irradiation with swift heavy ions

Abstract: The lithium tantalate (LiTaO3) is a material of great interest for use in various applications of integrated photonic because it presents optical and ferroelectric properties that are very attractive. Potentially, LiTaO3 would allow to make structures with ferroelectric domains with submicron sizes. This material has not yet sufficiently been studied if we compare it with LiNbO3, mainly due to his low curie temperature, which has prevented their use in manufacturing techniques waveguides at high temperatures.

In this work, we show that is possible to make quality LiTaO3 waveguides (stoichiometric and congruent) using irradiation with heavy ions at high energies, which allows to generate homogeneous layers buried about micron damage and acts as a light barrier.

In order to reserch the damage resulting of profiles that we have studied in depth, on one hand, the refractive index profiles of optical guides (determined from the characterization of the guided modes) and on the other hand, the strcuctural damage profiles (disorder), determined by RBS channeling experiments (RBS-c).

Also, the optical propagation loss of the guides have been measured after certain heat treatments and we have found less than 1 dB/cm, which it shows the high quality of the manufactured guides. In a first analysis, the kinetics of damage found were compared with those already known in LiNbO3 found differences in the roles played by the so-called nuclear and electronic damage and the possible synergy between them. 

Venue

CMAM
Venue:
CMAM   -   Website
Street:
Faraday 3, Campus de Cantoblanco
ZIP:
28049
City:
Madrid
Country:
Country: es

Description

The seminar takes place at the meeting room of the CMAM