Pregled bibliografske jedinice broj: 1079872
Linewidth Narrowing with Ultimate Confinement of an Alkali Multipole Plasmon by Modifying Surface Electronic Wave Functions with Two-Dimensional Materials
Linewidth Narrowing with Ultimate Confinement of an Alkali Multipole Plasmon by Modifying Surface Electronic Wave Functions with Two-Dimensional Materials // Physical review letters, 125 (2020), 126802, 6 doi:10.1103/PhysRevLett.125.126802 (međunarodna recenzija, članak, znanstveni)
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Naslov
Linewidth Narrowing with Ultimate Confinement of
an Alkali
Multipole Plasmon by Modifying Surface Electronic
Wave
Functions with Two-Dimensional Materials
Autori
Tanaka Shunsuke ; Yoshida Tatsuya ; Watanabe Kazuya ; Matsumoto Yoshiyasu ; Yasuike Tomokazu ; Petrović Marin ; Kralj Marko
Izvornik
Physical review letters (0031-9007) 125
(2020);
126802, 6
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
plasmon ; multipole plasmon ; graphene ; hexagonal boron nitride ; alkali
Sažetak
This work demonstrates significant line narrowing of a surface multipole plasmon (MP) by modifying the surface electronic wave function with two- dimensional materials (2DMs): graphene and hexagonal boron nitride. This is found in an optical reflectivity of alkali atoms (Cs or K) on an Ir(111) surface covered with the 2DMs. The reduction in reflectivity induced by deposition of the alkali atoms becomes as large as 20% at ~2 eV, which is ascribed to a MP of a composite of alkali/2DM/alkali/Ir multilayer structure. The linewidth of the MP band becomes as narrow as 0.2 eV by the presence of the 2DM between the two alkali layers. A numerical simulation by time- dependent density functional theory with a jellium model reveals that the density of states of the surface localized state is sharpened remarkably by the 2DMs that decouple the outermost alkali layer from the Ir bulk. Consequently, a local field enhancement of an order of 10^5 is achieved by ultimate confinement of the MP within the outermost alkali layer. This work leads to a novel strategy for reducing plasmon dissipation in an atomically thin layer via atomic scale modification of surface structure.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
IP-2016-06-3211 - Optička svojstva heterostruktura dihalkogenida prijelaznih metala (OhTMD) (Kralj, Marko, HRZZ - 2016-06) ( CroRIS)
Ustanove:
Institut za fiziku, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- MEDLINE
- Nature Index