Photo-induced effects in functional oxides studied by time-resolved optical spectroscopy

通过时间分辨光谱研究功能氧化物的光致效应

• 批准号: 237099515
• 负责人: Professorin Dr. Christine Kuntscher
• 金额: --
• 依托单位: Lehrstuhl für Experimentalphysik II
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/237099515?language=en
• 关键词: Photo; induced; effects; functional; oxides

Within this project the photoinduced effects in functional oxides, namely ferroelectricsand multiferroics, will be studied. The focus will be on the phenomenon of photostriction, i.e., deformation induced by light irradiation, which is considered as a combination of the photovoltaic and the piezoelectric effect. By time-resolved infrared spectroscopy we will characterize the changes in the optical properties of functional oxides under irradiation with various wavelengths and search for photoinduced excitations. Since compressive strain is expected to enhance the piezoelectric effect, the optical measurements will also be carried out on strained films and on crystals under hydrostatic compression. The proposed studies should help to understand the combined mechanical, electrical, and optical functionalities in ferroelectrics and multiferroics.

本计画将研究功能性氧化物（铁电及多铁性）之光致效应。重点将放在光致伸缩现象上，即，由光照射引起的变形，其被认为是光伏和压电效应的组合。通过时间分辨红外光谱，我们将表征功能氧化物在不同波长照射下光学性质的变化，并寻找光致激发。由于压缩应变预计将提高压电效应，光学测量也将进行应变膜和晶体在静水压力下。这些研究将有助于理解铁电和多铁性材料中的机械、电学和光学功能。

项目成果

Chemical pressure effect in Sm and La substituted ferroelectric BiFeO3 thin films: Insights from infrared spectroscopy

• DOI: 10.1063/1.4980105
• 发表时间: 2017-04-14
• 期刊: JOURNAL OF APPLIED PHYSICS
• 影响因子: 3.2
• 作者: Burkert, F.;Janowski, M.;Kuntscher, C. A.
• 通讯作者: Kuntscher, C. A.

Optical spectroscopy study on the photo-response in multiferroic BiFeO3

• DOI: 10.1063/1.4966548
• 发表时间: 2016-10-31
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Burkert, F.;Kreisel, J.;Kuntscher, C. A.
• 通讯作者: Kuntscher, C. A.

Temperature-dependent photo-response in multiferroic BiFeO 3 revealed by transmission measurements

• DOI: 10.1063/1.5081038
• 发表时间: 2019-02
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: F. Meggle;M. Viret;J. Kreisel;C. Kuntscher