中文版 | English
Title

Thermal energy dependent transient permittivity of epsilon-near-zero material

Author
Corresponding AuthorMei, Ting
Publication Years
2022-08-01
DOI
Source Title
ISSN
1674-7348
EISSN
1869-1927
Volume65Issue:8
Abstract
Transparent conductive oxides exhibit attractive optical nonlinearity with ultrafast response and giant refractive index change near the epsilon-near-zero (ENZ) wavelength, originating from the intraband dynamics of conduction electrons. The optical nonlinearity of ENZ materials has been explained by using the overall-effective-mass and the overall-scattering-time of electrons in the extended Drude model. However, their response to optical excitation is yet the last building block to complete the theory. In this paper, the concept of thermal energy is theoretically proposed to account for the total energy of conduction electrons exceeding their thermal equilibrium value. The time-varying thermal energy is adopted to describe the transient optical response of indium-tin-oxide (ITO), a typical ENZ material. A spectrally-resolved femtosecond pump-probe experiment was conducted to verify our theory. By correlating the thermal energy with the pumping density, both the giant change and the transient response of the permittivity of ITO can be predicted. The results in this work provide a new methodology to describe the transient permittivities of ENZ materials, which will benefit the design of ENZ-based nonlinear photonic devices.
Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
Others
Funding Project
National Natural Science Foundation of China["91950207","12174310","61805157","11974282"]
WOS Research Area
Physics
WOS Subject
Physics, Multidisciplinary
WOS Accession No
WOS:000824699600004
Publisher
EI Accession Number
20222912365547
EI Keywords
Charge transfer ; Electrons ; Indium compounds ; Nonlinear optics ; Permittivity ; Photonic devices ; Refractive index ; Tin oxides ; Transient analysis
ESI Classification Code
Light/Optics:741.1 ; Nonlinear Optics:741.1.1 ; Optical Devices and Systems:741.3 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/356196
DepartmentDepartment of Materials Science and Engineering
量子科学与工程研究院
Affiliation
1.Northwestern Polytech Univ, MOE Key Lab Mat Phys & Chem Extraordinary Condit, Sch Phys Sci & Technol, Xian 710129, Peoples R China
2.Northwestern Polytech Univ, Shaanxi Key Lab Opt Informat Technol, Sch Phys Sci & Technol, Xian 710129, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
5.Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore
6.Singapore MIT Alliance Res & Technol SMART, LEES Program, Singapore 138602, Singapore
First Author AffilicationDepartment of Materials Science and Engineering
Recommended Citation
GB/T 7714
Wang, Heng,Sun, Lixun,Du, Kang,et al. Thermal energy dependent transient permittivity of epsilon-near-zero material[J]. Science China-Physics Mechanics & Astronomy,2022,65(8).
APA
Wang, Heng.,Sun, Lixun.,Du, Kang.,Zhang, Wending.,Chua, SooJin.,...&Mei, Ting.(2022).Thermal energy dependent transient permittivity of epsilon-near-zero material.Science China-Physics Mechanics & Astronomy,65(8).
MLA
Wang, Heng,et al."Thermal energy dependent transient permittivity of epsilon-near-zero material".Science China-Physics Mechanics & Astronomy 65.8(2022).
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