PtSe2薄膜的时间分辨太赫兹光谱特性研究(特邀)

Zijie Dai; Lixing Kang; Cheng Gong; Zheng Liu; Weiwei Liu

doi:10.3788/gzxb20215008.0850206

PtSe₂薄膜的时间分辨太赫兹光谱特性研究(特邀)

Translated title of the contribution: Exploration of PtSe₂ Thin Film Based on Time-resolved Terahertz Spectroscopy (Invited)

Zijie Dai, Lixing Kang, Cheng Gong, Zheng Liu, Weiwei Liu^*

^*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

Utilizing the time-resolved terahertz spectroscopy, the optical property of platinum selenide (PtSe₂) thin films with different thicknesses in terahertz band are investigated experimentally. As the applied pump fluences increase from 0 to 2 540 μJ/cm², the conductivity of 11 nm-PtSe₂ film increases and further leading to the attenuation of the transmitted terahertz wave. Conversely, the conductivity of 197 nm-PtSe₂ film decreases with the enhanced pump fluences that induces the increase of the transmitted terahertz wave. These characters enable PtSe₂ thin film to be a photoactive terahertz modulator, which shows an ultrafast (~14 ps) and broadband (0.2~1.8 THz) modulation (15%~35%) of terahertz waves. The research provides a potential PtSe₂-based platform to the active and ultrafast photonic devices at terahertz frequencies.

Translated title of the contribution	Exploration of PtSe₂ Thin Film Based on Time-resolved Terahertz Spectroscopy (Invited)
Original language	Chinese (Simplified)
Article number	0850206
Journal	Guangzi Xuebao/Acta Photonica Sinica
Volume	50
Issue number	8
DOIs	https://doi.org/10.3788/gzxb20215008.0850206
Publication status	Published - Aug 25 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021, Science Press. All right reserved.

ASJC Scopus Subject Areas

Atomic and Molecular Physics, and Optics

Keywords

Platinum selenide
Terahertz
Terahertz modulation
Time-resolved
Ultrafast

Access to Document

10.3788/gzxb20215008.0850206

Cite this

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title = "PtSe2薄膜的时间分辨太赫兹光谱特性研究(特邀)",

abstract = "Utilizing the time-resolved terahertz spectroscopy, the optical property of platinum selenide (PtSe2) thin films with different thicknesses in terahertz band are investigated experimentally. As the applied pump fluences increase from 0 to 2 540 μJ/cm2, the conductivity of 11 nm-PtSe2 film increases and further leading to the attenuation of the transmitted terahertz wave. Conversely, the conductivity of 197 nm-PtSe2 film decreases with the enhanced pump fluences that induces the increase of the transmitted terahertz wave. These characters enable PtSe2 thin film to be a photoactive terahertz modulator, which shows an ultrafast (~14 ps) and broadband (0.2~1.8 THz) modulation (15%~35%) of terahertz waves. The research provides a potential PtSe2-based platform to the active and ultrafast photonic devices at terahertz frequencies.",

keywords = "Platinum selenide, Terahertz, Terahertz modulation, Time-resolved, Ultrafast",

author = "Zijie Dai and Lixing Kang and Cheng Gong and Zheng Liu and Weiwei Liu",

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doi = "10.3788/gzxb20215008.0850206",

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AU - Dai, Zijie

AU - Kang, Lixing

AU - Gong, Cheng

AU - Liu, Zheng

AU - Liu, Weiwei

PY - 2021/8/25

Y1 - 2021/8/25

N2 - Utilizing the time-resolved terahertz spectroscopy, the optical property of platinum selenide (PtSe2) thin films with different thicknesses in terahertz band are investigated experimentally. As the applied pump fluences increase from 0 to 2 540 μJ/cm2, the conductivity of 11 nm-PtSe2 film increases and further leading to the attenuation of the transmitted terahertz wave. Conversely, the conductivity of 197 nm-PtSe2 film decreases with the enhanced pump fluences that induces the increase of the transmitted terahertz wave. These characters enable PtSe2 thin film to be a photoactive terahertz modulator, which shows an ultrafast (~14 ps) and broadband (0.2~1.8 THz) modulation (15%~35%) of terahertz waves. The research provides a potential PtSe2-based platform to the active and ultrafast photonic devices at terahertz frequencies.

AB - Utilizing the time-resolved terahertz spectroscopy, the optical property of platinum selenide (PtSe2) thin films with different thicknesses in terahertz band are investigated experimentally. As the applied pump fluences increase from 0 to 2 540 μJ/cm2, the conductivity of 11 nm-PtSe2 film increases and further leading to the attenuation of the transmitted terahertz wave. Conversely, the conductivity of 197 nm-PtSe2 film decreases with the enhanced pump fluences that induces the increase of the transmitted terahertz wave. These characters enable PtSe2 thin film to be a photoactive terahertz modulator, which shows an ultrafast (~14 ps) and broadband (0.2~1.8 THz) modulation (15%~35%) of terahertz waves. The research provides a potential PtSe2-based platform to the active and ultrafast photonic devices at terahertz frequencies.

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