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

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

Bibliographic Details
Main Author: French, Kyle J.
Language:English
Published: University of Dayton / OhioLINK 2019
Subjects:
Physics
Optics
Materials Science
PMNPT
PMN-PT
optical crystal
thick film
thin films
electro optic
electro-optic
kerr effect
pockels effect
polycrystalline
ceramic crystal
relaxor
ferroelectric
laser
communication
sol-gel
dip coat
beam steering
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-dayton15759937501257282021-08-03T07:13:36Z Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films French, Kyle J. Physics Optics Materials Science PMNPT PMN-PT optical crystal thick film thin films electro optic electro-optic kerr effect pockels effect polycrystalline ceramic crystal relaxor ferroelectric laser communication sol-gel dip coat beam steering Lead magnesium niobate-lead titanate (1-x)[Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>]-x[PbTiO<sub>3</sub>] (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 (SrTiO<sub>3</sub>), lanthanum aluminate (LaAlO<sub>3</sub>), 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, 푟<sub>13</sub>, of 196pm/V while only applying 23V across the crystal. 2019 English text University of Dayton / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728 http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Physics
Optics
Materials Science
PMNPT
PMN-PT
optical crystal
thick film
thin films
electro optic
electro-optic
kerr effect
pockels effect
polycrystalline
ceramic crystal
relaxor
ferroelectric
laser
communication
sol-gel
dip coat
beam steering
spellingShingle Physics
Optics
Materials Science
PMNPT
PMN-PT
optical crystal
thick film
thin films
electro optic
electro-optic
kerr effect
pockels effect
polycrystalline
ceramic crystal
relaxor
ferroelectric
laser
communication
sol-gel
dip coat
beam steering
French, Kyle J.
Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films
author French, Kyle J.
author_facet French, Kyle J.
author_sort French, Kyle J.
title Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films
title_short Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films
title_full Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films
title_fullStr Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films
title_full_unstemmed Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films
title_sort growth of optical quality lead magnesium niobate-lead titanate thick films
publisher University of Dayton / OhioLINK
publishDate 2019
url http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728
work_keys_str_mv AT frenchkylej growthofopticalqualityleadmagnesiumniobateleadtitanatethickfilms
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