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Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films

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2019, Master of Science (M.S.), University of Dayton, Electro-Optics.
Lead magnesium niobate-lead titanate (1-x)[Pb(Mg1/3Nb2/3)O3]-x[PbTiO3] (PMN-PT) is a relaxor ferroelectric crystal that has many uses, specifically in non-mechanical beam steering for use in Light Detection And Ranging (LIDAR) assemblies, or other optical devices, such as free space laser communication. When using bulk PMN-PT crystals, the voltage required to steer a beam can be in the kilovolt range. However, with unique designs, optical quality PMN-PT polycrystalline thick films (5-50μm thick) could be used in order to minimize the voltage required for beam steering projects to less than 100V. Steering an optical beam requires a change in index of refraction, which is dependent on the electric field. The required voltage to produce an electric field is dependent on the thickness of the field region, so thinner regions between electrodes will result in lower required voltage to produce the same electric field, and therefore the same change in index of refraction. In the present research, PMN-PT polycrystalline thick films were grown on strontium titanate (SrTiO3), lanthanum aluminate (LaAlO3), and platinum substrates, via a modified sol-gel method. These films were deposited by a dip-coat method and annealed by a fast-fire method. Using the polycrystalline PMN-PT crystal as a phase modulator, the optical path delay (OPD) was measured with a maximum voltage applied across the PMN-PT crystal. Using Jones matrices to calculate the polarization and crystallography to identify the correct electro-optical coefficients, we can measure the values for a few specific linear electro-optic coefficients. This experiment resulted in a measured value for the linear electro-optic effect coefficient, 𝑟13, of 196pm/V while only applying 23V across the crystal.
Paul McManamon, Ph.D (Committee Chair)
Partha Banerjee, Ph.D (Committee Member)
Ratnakar Neurgaonkar, Ph.D (Committee Member)
77 p.

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Citations

  • French, K. J. (2019). Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728

    APA Style (7th edition)

  • French, Kyle. Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films. 2019. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728.

    MLA Style (8th edition)

  • French, Kyle. "Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films." Master's thesis, University of Dayton, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728

    Chicago Manual of Style (17th edition)