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Type: Artigo de evento
Title: Design And Fabrication Of Two-dimensional Hexagonal Photonic Crystals With A Linear Waveguide In Erbium Doped Geo2-bi2o 3-pbo-tio2 Glasses
Author: Avila L.F.
Almeida J.M.P.
Goncalves M.S.
Valle P.S.
Nalin M.
Mendonca C.R.
Cescato L.
Abstract: In this work, we designed and recorded two-dimensional Hexagonal Photonic Crystals (2D-HPC) layers, with a linear waveguide, in erbium doped GeO 2-Bi2O3-PbO-TiO2 glassy films, by combining the techniques of holographic recording and femtosecond (fs) laser micromachining. The 2D-HPC is recorded holographically in a photoresist film coated on a glass substrate by exposing the sample to the same interference pattern twice and rotating the sample of 60° between the exposures. After the development a two dimensional hexagonal array of photoresist columns remain on the glass substrate. The recording of the waveguide is made by a fs laser micromachining system focused at sample surface. The laser spot produces the ablation of the photoresist columns generating a defect line in the periodic hexagonal array. After the recording of the photoresist template, the erbium doped GeO2-Bi2O3-PbO-TiO2 film is evaporated on the photoresist and finally the photoresist template is removed using acetone. The design of the geometrical parameters of the 2D-HPC is performed by calculation of the dispersion mode curves of the photonic crystal using a 2D finite element method. The proper geometrical parameters depend on both the refractive index of the glass film and thickness. Such parameters as well as the period of the 2D-HPC have been defined in order to obtain a photonic band gap in the region of erbium luminescence band. In such condition the erbium luminescence will propagate only through the waveguide. © 2013 SPIE.
Rights: aberto
Identifier DOI: 10.1117/12.2018734
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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