Plasmonics in atomically thin crystalline silver

Vahagn Mkhitaryan, Zakaria M. Abd El-Fattah, J. Brede, L. Fernández, Qiushi Guo, Cheng Li, Arnab Ghosh, Doron Naveh, Fengnian Xia, J. E. Ortega, F. Javier García De Abajo

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We report on the fabrication of few-atomic-layer-thick wafer-scale crystalline silver films, along with the observation of plasmons in the near-to-mid infrared spectral regions upon lithographic structuring. Our measured optical spectra reveal narrow plasmons (quality factor ∼ 4), further supported by a low sheet resistance comparable to bulk metal in few-atomic-layer silver films down to 7 Ag(111) monolayers. Good crystal quality and plasmon narrowness are obtained despite the addition of a thin passivating dielectric, which renders our samples resilient to ambient conditions.

Original languageEnglish
Title of host publication21st International Conference on Transparent Optical Networks, ICTON 2019
PublisherIEEE Computer Society
ISBN (Electronic)9781728127798
DOIs
StatePublished - Jul 2019
Event21st International Conference on Transparent Optical Networks, ICTON 2019 - Angers, France
Duration: 9 Jul 201913 Jul 2019

Publication series

NameInternational Conference on Transparent Optical Networks
Volume2019-July
ISSN (Electronic)2162-7339

Conference

Conference21st International Conference on Transparent Optical Networks, ICTON 2019
Country/TerritoryFrance
CityAngers
Period9/07/1913/07/19

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

Funding

We thank Ralph Gay, Luis Hueso, Johan Osmond, Marta Autore, and Rainer Hillenbrand for technical support and helpful discussions. This work has been supported in part by the Spanish MINECO (MAT2017-88492-R, SEV2015-0522, and PCIN-2015-155, and MAT2016–78293-C6–6-R), ERC (Advanced Grant 789104-eNANO), the Catalan CERCA Program, the Basque Government (IT-621–13), Fundació Privada Cellex, and the US National Science Foundation CAREER Award (1552461).

FundersFunder number
National Science Foundation1552461
Fundación Cellex
European Commission789104-eNANO
Eusko JaurlaritzaIT-621–13
Ministerio de Economía y CompetitividadMAT2017-88492-R, MAT2016–78293-C6–6-R, PCIN-2015-155, SEV2015-0522

    Keywords

    • 2D materials
    • 2D plasmonics
    • Atomically thin silver
    • Crystalline metal films
    • Ultrathin plasmonics

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