Evidence map›Paper›PMID 40478877›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2025

Broadband measurement of Feibelman's quantum surface response functions.

Zeling Chen, Shu Yang, Zetao Xie, Jinbing Hu, Xudong Zhang, Yipu Xia, Yonggen Shen, Huirong Su, Maohai Xie, Thomas Christensen and 1 more

Abstract read
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Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

11 authors.

Zeling Chen *Department of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.ORCID 0000-0003-4888-3888
Shu Yang *Department of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.
Zetao Xie *Department of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.ORCID 0000-0001-6489-4638
Jinbing HuDepartment of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.
Xudong ZhangDepartment of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.
Yipu XiaDepartment of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.
Yonggen ShenGenuine Optronics Limited, Shanghai 200252, China.
Huirong SuGenuine Optronics Limited, Shanghai 200252, China.
Maohai XieDepartment of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.ORCID 0000-0002-5017-3810
Thomas ChristensenDepartment of Electrical and Photonics Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark.
Yi YangDepartment of Physics and HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam 999077, Hong Kong Special Administrative Regions of China.ORCID 0000-0003-2879-4968

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Feibelman [Formula: see text]-parameter, a mesoscopic complement to the local bulk permittivity, describes quantum optical surface responses for interfaces, including nonlocality, spill-in and -out, and surface-enabled Landau damping. It has been incorporated into the macroscopic Maxwellian framework for convenient modeling and understanding of nanoscale electromagnetic phenomena, calling for the compilation of a [Formula: see text]-parameter database for interfaces of interest in nano-optics. However, accurate first-principles calculations of [Formula: see text]-parameters face computational challenges, whereas existing measurements of [Formula: see text]-parameters are scarce and restricted to narrow spectral windows. We demonstrate a general broadband ellipsometric approach to measure [Formula: see text]-parameters at a gold-air interface across the visible-ultraviolet regimes. Gold is found to spill-in and spill-out at different frequencies. We also observe gold's Bennett mode, a surface-dipole resonance associated with a pole of the [Formula: see text]-parameter, around 2.5 eV. Our measurements give rise to and are further validated by the passivity and Kramers-Kronig causality analysis of [Formula: see text]-parameters. Our work advances the understanding of quantum surface response and may enable applications like enhanced electron field emission.

Indexed as

Feibelman d-parametersnanophotonicsplasmonics

Identifiers

PMID40478877
PMCPMC12167949

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.