Giant electric field-induced second harmonic generation in polar skyrmions.

Autor: Wang S; State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China., Li W; State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China., Deng C; State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China., Hong Z; School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China. hongzijian100@zju.edu.cn.; Research Institute of Zhejiang University-Taizhou, 318000, Taizhou, Zhejiang, China. hongzijian100@zju.edu.cn., Gao HB; CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, 100190, Beijing, China., Li X; Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 201204, Shanghai, China., Gu Y; Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 201204, Shanghai, China., Zheng Q; CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, 100190, Beijing, China. zhengq@nanoctr.cn., Wu Y; School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China., Evans PG; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA., Li JF; State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China., Nan CW; State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China., Li Q; State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China. qianli_mse@tsinghua.edu.cn.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Feb 14; Vol. 15 (1), pp. 1374. Date of Electronic Publication: 2024 Feb 14.
DOI: 10.1038/s41467-024-45755-5
Abstrakt: Electric field-induced second harmonic generation allows electrically controlling nonlinear light-matter interactions crucial for emerging integrated photonics applications. Despite its wide presence in materials, the figures-of-merit of electric field-induced second harmonic generation are yet to be elevated to enable novel device functionalities. Here, we show that the polar skyrmions, a topological phase spontaneously formed in PbTiO 3 /SrTiO 3 ferroelectric superlattices, exhibit a high comprehensive electric field-induced second harmonic generation performance. The second-order nonlinear susceptibility and modulation depth, measured under non-resonant 800 nm excitation, reach ~54.2 pm V -1 and ~664% V -1 , respectively, and high response bandwidth (higher than 10 MHz), wide operating temperature range (up to ~400 K) and good fatigue resistance (>10 10 cycles) are also demonstrated. Through combined in-situ experiments and phase-field simulations, we establish the microscopic links between the exotic polarization configuration and field-induced transition paths of the skyrmions and their electric field-induced second harmonic generation response. Our study not only presents a highly competitive thin-film material ready for constructing on-chip devices, but opens up new avenues of utilizing topological polar structures in the fields of photonics and optoelectronics.
(© 2024. The Author(s).)
Databáze: MEDLINE
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