Strain-controlled optical absorption in epitaxial ferroelectric BaTiO3 films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F15%3A00235946" target="_blank" >RIV/68407700:21340/15:00235946 - isvavai.cz</a>

Výsledek na webu

<a href="http://scitation.aip.org/content/aip/journal/apl/106/19/10.1063/1.4921083" target="_blank" >http://scitation.aip.org/content/aip/journal/apl/106/19/10.1063/1.4921083</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4921083" target="_blank" >10.1063/1.4921083</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Strain-controlled optical absorption in epitaxial ferroelectric BaTiO3 films

Popis výsledku v původním jazyce

A lattice strain of 0.3%?1.3% is achieved in epitaxial tetragonal BaTiO3 films grown on (001)-oriented SrTiO3 single-crystal substrates. Our experimental studies of absorption spectra in the range of 0.74?9.0?eV demonstrate that epitaxy produces significant changes in the optical properties of the films compared with those of a reference polydomain BaTiO3 crystal: the absorption edge and the peak at 5?eV strongly blue-shift by 0.2?0.4?eV, the magnitude of the peak at 5?eV drops, and certain spectral features disappear, whereas the absorption peak at 8.5?eV remains unchanged. The observed behavior is attributed to ferroelectric polarization, which is enhanced by epitaxial strain in the films. Our results indicate that epitaxially induced variations of ferroelectric polarization may be used to tailor the optical properties of thin films for photonic and optoelectronic applications.

Název v anglickém jazyce

Strain-controlled optical absorption in epitaxial ferroelectric BaTiO3 films

Popis výsledku anglicky

A lattice strain of 0.3%?1.3% is achieved in epitaxial tetragonal BaTiO3 films grown on (001)-oriented SrTiO3 single-crystal substrates. Our experimental studies of absorption spectra in the range of 0.74?9.0?eV demonstrate that epitaxy produces significant changes in the optical properties of the films compared with those of a reference polydomain BaTiO3 crystal: the absorption edge and the peak at 5?eV strongly blue-shift by 0.2?0.4?eV, the magnitude of the peak at 5?eV drops, and certain spectral features disappear, whereas the absorption peak at 8.5?eV remains unchanged. The observed behavior is attributed to ferroelectric polarization, which is enhanced by epitaxial strain in the films. Our results indicate that epitaxially induced variations of ferroelectric polarization may be used to tailor the optical properties of thin films for photonic and optoelectronic applications.

Druh

O - Ostatní výsledky

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů