Ultrafast Multilevel Optical Tuning with CSb2Te3 Thin Films

Yun Meng; Jitendra K. Behera; Shuai Wen; Robert E. Simpson; Jianjun Shi; Liangcai Wu; Zhitang Song; Jingsong Wei; Yang Wang

doi:10.1002/adom.201800360

Ultrafast Multilevel Optical Tuning with CSb₂Te₃ Thin Films

Yun Meng, Jitendra K. Behera, Shuai Wen, Robert E. Simpson, Jianjun Shi, Liangcai Wu^*, Zhitang Song, Jingsong Wei, Yang Wang

^*Corresponding author for this work

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

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.

Original language	English
Article number	1800360
Journal	Advanced Optical Materials
Volume	6
Issue number	17
DOIs	https://doi.org/10.1002/adom.201800360
Publication status	Published - 4 Sept 2018

Bibliographical note

Funding Information:
This work was supported by National Key Research and Development Program of China (2017YFB0701703) and National Natural Science Foundation of China (61076121, 51472258, 61178059, 51672292, and 61627826). R.E.S. acknowledges support from the A-Star Singapore-China Joint Research Program (JRP) through Grant No: 1420200046. Y.M. is grateful for his Ph.D. Chinese Government scholarship and acknowledges support by CSC.

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

carbon doping
dynamic reconfiguration
optical states
phase change materials
picosecond laser switching
pump–probe measurements
tunable

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

Access to Document

10.1002/adom.201800360

Cite this

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title = "Ultrafast Multilevel Optical Tuning with CSb2Te3 Thin Films",

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.",

keywords = "carbon doping, dynamic reconfiguration, optical states, phase change materials, picosecond laser switching, pump–probe measurements, tunable",

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AU - Shi, Jianjun

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AU - Song, Zhitang

AU - Wei, Jingsong

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