Sol-gel derived La-doped PbTiO3 waveguides

G. Teowee, C. D. Baertlein, S. Motakef, E. L. Quackenbush, J. M. Boulton, Donald R Uhlmann

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

PbTi03-based ferroelectric films are attractive materials for passive and active waveguides due to their high refractive indices (> 2.0), small attenuation losses (1-6 dB/cm) and low processing temperatures (<600C). A series of solgel derived La-doped PbTiO3 waveguides was prepared on Coming 7059 glasses. 0.5M precursor solutions of Pb1-x/100 Lax/100Ti1-x/400O3 with x = 0, 5,10,15, 20, 25,28,30 and 32 were spincoated on the substrates and fired to 400C, 500C and 600C for 30 mins. XRD was used to determine the phase assembly present in the films as a funcion of La stoichiometry and firing temperature. The presence of La seemed to aid in achieving the formation of single-phase perovskite films. Transmission spectra obtained using a UV-Vis spectrometer provided information on band gap energies; and the spectra were used to calculate the refarctive indices and extinction coefficients based on the envelope method. The refractive index decreased and band gap increased with increasing La content in the films. The waveguiding properties and optical attenuation were studied by prism coupling using a HeNe laser and rutile prism. The optical losses are discussed with regard to composition (especially La content), phase assembly and inicrostmcture of the films. Crystalline PLT 28 films exhibit attenuation loss as low as 1.4 dB/cm, which represent the lowest reported value for any solgel or sputtered PLZT film.

Original languageEnglish (US)
Pages (from-to)47-58
Number of pages12
JournalIntegrated Ferroelectrics
Volume11
Issue number1-4
DOIs
StatePublished - 1995

Fingerprint

Sol-gels
Waveguides
gels
waveguides
Prisms
attenuation
Refractive index
Energy gap
prisms
Ultraviolet spectrometers
Ferroelectric films
assembly
Optical losses
refractivity
Stoichiometry
Perovskite
rutile
stoichiometry
extinction
Crystalline materials

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Ceramics and Composites
  • Materials Chemistry
  • Electronic, Optical and Magnetic Materials

Cite this

Teowee, G., Baertlein, C. D., Motakef, S., Quackenbush, E. L., Boulton, J. M., & Uhlmann, D. R. (1995). Sol-gel derived La-doped PbTiO3 waveguides. Integrated Ferroelectrics, 11(1-4), 47-58. https://doi.org/10.1080/10584589508013578

Sol-gel derived La-doped PbTiO3 waveguides. / Teowee, G.; Baertlein, C. D.; Motakef, S.; Quackenbush, E. L.; Boulton, J. M.; Uhlmann, Donald R.

In: Integrated Ferroelectrics, Vol. 11, No. 1-4, 1995, p. 47-58.

Research output: Contribution to journalArticle

Teowee, G, Baertlein, CD, Motakef, S, Quackenbush, EL, Boulton, JM & Uhlmann, DR 1995, 'Sol-gel derived La-doped PbTiO3 waveguides', Integrated Ferroelectrics, vol. 11, no. 1-4, pp. 47-58. https://doi.org/10.1080/10584589508013578
Teowee G, Baertlein CD, Motakef S, Quackenbush EL, Boulton JM, Uhlmann DR. Sol-gel derived La-doped PbTiO3 waveguides. Integrated Ferroelectrics. 1995;11(1-4):47-58. https://doi.org/10.1080/10584589508013578
Teowee, G. ; Baertlein, C. D. ; Motakef, S. ; Quackenbush, E. L. ; Boulton, J. M. ; Uhlmann, Donald R. / Sol-gel derived La-doped PbTiO3 waveguides. In: Integrated Ferroelectrics. 1995 ; Vol. 11, No. 1-4. pp. 47-58.
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