期刊
PHYSICAL REVIEW MATERIALS
卷 4, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.4.034406
关键词
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资金
- EU European Research Council [694955-INSEETO]
- Swiss National Science Foundation [200021_178825]
- National Science Foundation [IRES-1358111]
- Air Force Office of Scientific Research [FA9550-18-1-0053]
- European Commission [H2020-ICT-2015-25-688579, H2020-ICT-2017-1-780997]
- Swiss State Secretariat for Education, Research and Innovation [15.0285, 16.0001]
- Swiss National Foundation [200021_159565]
- Swiss National Science Foundation (SNF) [200021_178825, 200021_159565] Funding Source: Swiss National Science Foundation (SNF)
We investigate the ferroelectric domain architecture and its operando response to an external electric field in BaTiO3 -based electro-optic heterostructures integrated on silicon. By noninvasive optical second-harmonic generation, we identify the preexistence of in-plane (a-) domains dispersed within a predominantly out-of-plane- (c-) oriented matrix. Monitoring the poling behavior of the respective domain populations, we show that the spontaneous polarization of these a-domains lack a predominant orientation in the pristine state, yet can be selectively aligned with an in-plane electric field, leaving the c-domain population intact. Hence, domain reorientation of a ferroelastic c-to-a type was directly excluded. Such independent electrical control of ferroelectric a-domains in a c-oriented BaTiO3 film on silicon is a valuable platform for engineering multidirectional electro-optic functionality in integrated photonic devices.
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