Effect of LiNbO3polarity on the structural, optical and acoustic properties of epitaxial ZnO and MgxZn1−xO films
| Autor: | Pascal Boulet, Ausrine Bartasyte, Marina Raschetti, David Albertini, Samuel Margueron, Sylvain Ballandras, Cyril Millon, Thomas Baron, Sabina Kuprenaite, William Daniau, Brice Gautier |
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| Přispěvatelé: | Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Band gap Physics::Optics 02 engineering and technology Dielectric Epitaxy 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials Condensed Matter::Materials Science 0103 physical sciences [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics ComputingMilieux_MISCELLANEOUS 010302 applied physics business.industry Sputter deposition 021001 nanoscience & nanotechnology Condensed Matter Physics Ferroelectricity Surfaces Coatings and Films Electronic Optical and Magnetic Materials Band bending Semiconductor [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Sapphire Optoelectronics 0210 nano-technology business |
| Zdroj: | Journal of Physics D: Applied Physics Journal of Physics D: Applied Physics, IOP Publishing, 2018, 51 (48), pp.484003. ⟨10.1088/1361-6463/aadcce⟩ |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/1361-6463/aadcce |
| Popis: | The effect of LiNbO3 substrate polarization on a charge density at the interface with epitaxial ZnO and MgxZn1−x O films was studied in comparison with ZnO films on dielectric sapphire substrates. An excitonic emission and optical properties such as band gap energy, refraction index, absorption and reflectivity of the ZnO/LiNbO3 structures were studied. The effect of interface charges on the performance of surface acoustic waves with frequency of 2.7 GHz was investigated, as well. The stimulated cavity mode emission was observed due to attained quasi-phase matching conditions for thin ZnO films on sapphire at high laser excitation power. The positive polarization of the ferroelectric substrate induced the band bending of the semiconductor layer, resulting in the accumulation of the negative charges at the ferroelectric/semiconductor interface, which induced an increased reflectivity, a generation of oxygen emission lines in PL spectra under laser excitation, and an increased electromechanical coupling of surface acoustic waves. The negative polarization of the substrate increased atomic peening during sputtering deposition, which induced deteriorated quality of texture and in-plane orientation and increased the residual stresses in ZnO and MgxZn1−x O films. |
| Databáze: | OpenAIRE |
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