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Si-integrated BaTiO<sub>3</sub> modulators for Quantum Computing with Si photonics

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Abstract

Silicon is essentially transparent above 1300 nm and can be machined into practically any shape with extremely high precision and with minimal surface roughness.  These two properties make it extremely attractive for fabricating waveguides operating at the telecom wavelength of 1550 nm, making a natural connection between the optical fiber and Si chip. Silicon photonics has many applications, including in quantum information sciences. One of the key elements of this emergent technology is the integrated electro-optical modulator (Mach Zehnder interferometer (MZI) or ring resonator). I will discuss our recent work on integrating ferroelectric BaTiO3 (BTO) with Si photonics to make integrated electro-optical modulators using the linear electro optic or Pockels effect for applications in optical quantum computing.

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Publication: A. A. Demkov, C. Bajaj, J. G. Ekerdt, C. J. Palmström, and S. J. Ben Yoo, "Materials for emergent silicon-integrated optical computing," J. Appl. Phys. 130, 070907 (2021). DOI: 10.1063/5.0056441<br>A. B. Posadas, H. Park, M. Reynaud, W. Cao, J. D. Reynolds, W. Guo, V. Jeyaselvan, I. Beskin, G. Mashanovich, J. H. Warner, and A. A. Demkov, "Thick BaTiO3 epitaxial films integrated on Si by RF sputtering for electro-optic modulators in Si photonics," ACS Applied Materials & Interfaces, https://doi.org/10.1021/acsami.1c14048, (2021).

Presenters

  • Alexander A Demkov

    University of Texas at Austin, Department of Physics, University of Texas at Austin

Authors

  • Alexander A Demkov

    University of Texas at Austin, Department of Physics, University of Texas at Austin

  • Agham Posadas

    The University of Texas at Austin, University of Texas at Austin

  • Dan Wasserman

    The University of Texas at Austin, Department of Electrical and Computer Engineering, University of Texas at Austin

  • Zuoming Dong

    The University of Texas at Austin, Department of Electrical and Computer Engineering, University of Texas at Austin