Terahertz and Photoelectron Emission from Nanoporous Gold Films on Semiconductors.

Junyi Nan, Min Li, Ling Zhang, Shuai Yuan, Boqu He, Heping Zeng

Abstract read

In one paragraph

Article in Nanomaterials (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed

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1 citing paper in PubMed.

Ultrafast terahertz emission from emerging symmetry-broken materials.Light, science & applications · 2023
Review

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5 · Who and what money

Authors and funding

6 authors.

Junyi NanState key laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China. 52162099006@stu.ecnu.edu.cn.

Min LiShanghai Key Lab of Modern Optical System, School of Optical-Electrical and Computing Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. minli1220@usst.edu.cn.

Ling ZhangShanghai Key Lab of Modern Optical System, School of Optical-Electrical and Computing Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. lzhang@usst.edu.cn.

Shuai YuanShanghai Key Lab of Modern Optical System, School of Optical-Electrical and Computing Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. syuan@usst.edu.cn.

Boqu HeState key laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China. boquhe@foxmail.com.ORCID 0000-0002-2906-5305

Heping ZengState key laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China. hpzeng@phy.ecnu.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Efficient terahertz and photoelectron emission were observed from nano-porous gold (NPG) films deposited on an intrinsic gallium arsenide (GaAs) semiconductor substrate stimulated by femtosecond laser with pulse width of 60 fs. Time-domain THz emission and reflection spectroscopy confirmed that the free charges accelerated by irradiated femtosecond laser pulses transferred from the NPG films into the GaAs substrates. Accordingly, charges accumulation was reduced in the NPG films, resulting in a stronger emission of THz pulse than that from NPG films deposited on SiO₂ substrate. Charges injected into the GaAs substrate enforced an observable decrease of the THz refractive index proportional to the intensity of incident light. In comparison, for NPG deposited on glass substrates, laser induced free charges were accumulated in the NPG films, and femtosecond laser pulses irradiating on the NPG films made no changes of the THz refractive index of the glass substrates.

Indexed as

localized surface plasmonsnanoporous goldoptical rectificationterahertz radiation

Identifiers

PMID30871029

DOI10.3390/nano9030419

PMCPMC6474000

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