Ultrafast Multilevel Optical Tuning with CSb2Te3 Thin Films
Source abstract
Abstract
Abstract Tunable and reconfigurable functionalities are crucial for advanced photonic devices. In this study, CSb2Te3 is proposed as a new optical tuning material. Single‐shot picosecond laser pulses are used to transform the CSb2Te3 into six different optical states; each optical state can be achieved from any other state. The dielectric function for each optical state is unique and the switching is achieved on a picosecond time scale. The impact of the crystal structure on the optical tuning mechanism is studied using transmission electron microscopy and density functional theory. Second harmonic generation in the CSb2Te3 films indicates that the crystal orientation for the switched layer is influenced by the pump laser polarization. Thus electric field may provide a further degree of freedom to design phase change materials.
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Research context
OpenAlex topics: Phase-change materials and chalcogenides · Solid State Laser Technologies · Photorefractive and Nonlinear Optics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of High Power Laser Materials Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China
University of the Chinese Academy of Sciences Beijing 100080 China
ACTA Lab Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore
College of Science Donghua University Shanghai 201620 China
State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Micro‐system and Information Technology Chinese Academy of Sciences Shanghai 200050 China
Funding
National Natural Science Foundation of China
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