Quantum-Spillover-Enhanced Surface-Plasmonic Absorption at the Interface of Silver and High-Index Dielectrics
Name
PhysRevLett.115.193901.pdf
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1.17 MB
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Author(s)
Jin, Dafei
Hu, Qing
Neuhauser, Daniel
von Cube, Felix
Yang, Yingyi
Sachan, Ritesh
Luk, Ting S.
Bell, David C.
Fang, Nicholas Xuanlai
Date Issued
November 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Jin, Dafei, et al. "Quantum-Spillover-Enhanced Surface-Plasmonic Absorption at the Interface of Silver and High-Index Dielectrics." Phys. Rev. Lett. 115, 193901 (November 2015). © 2015 American Physical Society
Version
Final published version
Abstract
We demonstrate an unexpectedly strong surface-plasmonic absorption at the interface of silver and high-index dielectrics based on electron and photon spectroscopy. The measured bandwidth and intensity of absorption deviate significantly from the classical theory. Our density-functional calculation well predicts the occurrence of this phenomenon. It reveals that due to the low metal-to-dielectric work function at such interfaces, conduction electrons can display a drastic quantum spillover, causing the interfacial electron-hole pair production to dominate the decay of surface plasmons. This finding can be of fundamental importance in understanding and designing quantum nanoplasmonic devices that utilize noble metals and high-index dielectrics.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.115.193901
