Optical effects induced by epitaxial tension in lead titanate

0489354 - FZÚ 2019 RIV US eng J - Journal Article
Dejneka, Alexandr - Chvostová, Dagmar - Pacherová, Oliva - Kocourek, Tomáš - Jelínek, Miroslav - Tyunina, Marina
Optical effects induced by epitaxial tension in lead titanate.
Applied Physics Letters. Roč. 112, č. 3 (2018), s. 1-5, č. článku 031111. ISSN 0003-6951. E-ISSN 1077-3118
R&D Projects: GA ČR GA15-13778S; GA ČR GA15-15123S
Institutional support: RVO:68378271
Keywords : epitaxy * inorganic compounds * optical properties * ferroelectric materials * optical metrology
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.521, year: 2018

Single-crystal-type epitaxial films of perovskite oxide ferroelectrics are attractive for integrated photonic applications because of the remarkable optical properties and effects in ferroelectrics. The properties of the films may be influenced by epitaxial strain arising from the film-substrate mismatch. Here, dramatic strain-induced changes of the absorption and refraction are experimentally detected by spectroscopic ellipsometry in epitaxial films of archetypical ferroelectric PbTiO3. Comparison of the properties of a tensile-strained film with those of reference films and crystals reveals that epitaxial tension produces blueshifts of the primary above-bandgap absorption peaks by 1 eV and a decrease in the refractive index by 0.5 in the transparent spectral range.
Permanent Link: http://hdl.handle.net/11104/0283788