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This study explores the electro-optic (EO) properties of lead zirconate titanate (Pb(Zr,Ti)O3) thin films fabricated using a solution process. The films exhibit excellent EO performance, paving the way for their use in silicon photonics.

Keywords:
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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Optoelectronics

Background:

  • While electrical properties of Pb(Zr,Ti)O3 thin films are well-researched for applications like capacitors and memory devices, their electro-optic (EO) properties remain underexplored.
  • This knowledge gap limits the integration of Pb(Zr,Ti)O3 films into EO applications, particularly in silicon photonics for phase modulators.

Purpose of the Study:

  • To investigate and characterize the electro-optic (EO) properties of Pb(Zr,Ti)O3 thin films.
  • To explore a promising solution processing method for fabricating these films with controlled microstructure and texture.
  • To assess the potential of these films for EO applications, especially in heterogeneously integrated silicon photonics.

Main Methods:

  • Solution processing of Pb(Zr,Ti)O3 thin films utilizing a La2O2CO3 template.
  • Characterization of precursor ink, film microstructure, and texture.
  • Measurement of electro-optic properties, including the Pockels coefficient (reff).
  • Integration and testing of the film in a ring resonator-based modulator to determine VπL.

Main Results:

  • The solution-processed Pb(Zr,Ti)O3 film exhibited a fiber texture.
  • A large maximum Pockels coefficient (reff) of 69 pm V-1 and remnant Pockels coefficient of 66 pm V-1 were measured.
  • The film demonstrated a low VπL of 2.019 V cm when integrated into a ring resonator modulator.

Conclusions:

  • The investigated solution process yields Pb(Zr,Ti)O3 thin films with significant electro-optic properties.
  • These findings highlight the potential of solution-processed Pb(Zr,Ti)O3 films for advanced EO applications.
  • The demonstrated performance is promising for the integration of these materials into silicon photonics platforms.