Details

Autor(en) / Beteiligte

• Wang, Sixu
• Li, Wei
• Deng, Chenguang
• Hong, Zijian
• Gao, Han-Bin
• Li, Xiaolong
• Gu, Yueliang
• Zheng, Qiang
• Wu, Yongjun
• Evans, Paul G
• Li, Jing-Feng
• Nan, Ce-Wen
• Li, Qian

Titel

Giant electric field-induced second harmonic generation in polar skyrmions

Ist Teil von

• Nature communications, 2024-02, Vol.15 (1), p.1374-1374

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Electronic Journals Library - Freely accessible e-journals

Beschreibungen/Notizen

• 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 /SrTiO 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 and ~664% V , respectively, and high response bandwidth (higher than 10 MHz), wide operating temperature range (up to ~400 K) and good fatigue resistance (>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.