基于光激发铁电超晶格的太赫兹电调制器。

Ji Jie, Zhou Siyan, Zhang Jingcheng, Ling Furi, Yao Jianquan

Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China.

School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China.

Sci Rep. 2018 Feb 8;8(1):2682. doi: 10.1038/s41598-018-21095-5.

The transmission and dielectric spectra of ferroelectric STO/PT superlattice on Si substrate under simultaneous external optical and electric field were investigated and compared at room temperature. Results found that when with an optical field, the electric field realized an effective modulation on the transmission, which displayed a diode property. In addition, a comprehensive model combined with Debye relaxation and Lorentz model was used to analyze the dielectric spectra, variation of the soft mode with external field was put emphasis on exploring.

在室温下，研究并比较了硅衬底上铁电STO/PT超晶格在同时施加外部光场和电场时的透射光谱和介电光谱。结果发现，当存在光场时，电场对透射实现了有效调制，呈现出二极管特性。此外，采用结合德拜弛豫和洛伦兹模型的综合模型来分析介电光谱，重点探索软模随外部场的变化。