Ultrafast plasmon thermalization in epitaxial graphene probed by time-resolved THz spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00551642" target="_blank" >RIV/68378271:_____/21:00551642 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10437386

Výsledek na webu

<a href="https://doi.org/10.1002/adfm.202105763" target="_blank" >https://doi.org/10.1002/adfm.202105763</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.202105763" target="_blank" >10.1002/adfm.202105763</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultrafast plasmon thermalization in epitaxial graphene probed by time-resolved THz spectroscopy

Popis výsledku v původním jazyce

The control of carrier transport by electrical, chemical, or optical Fermi level tuning is central to graphene electronics. Here, an optical pump-terahertz (THz) probe spectroscopy is applied to investigate ultrafast sheet conductivity dynamics in various epitaxially grown graphene layers representing a large variety of carbon allotropes, including H2 intercalated films. The graphene layers display a prominent plasmonic response connected with induced THz transparency spectra on ultrashort timescale. It is shown that the plasmonic confinement potentials act within micrometer-sized domains with essentially isotropic character. The measured ultrafast dynamics are entirely controlled by the quasi-Fermi level of laser-excited carriers through their temperature. The photocarriers undergo a disorder-enabled super-collision cooling process with an initial picosecond transfer of the optically deposited heat to the lattice followed by a sub-nanosecond relaxation governed by the lattice cooling.

Název v anglickém jazyce

Ultrafast plasmon thermalization in epitaxial graphene probed by time-resolved THz spectroscopy

Popis výsledku anglicky

The control of carrier transport by electrical, chemical, or optical Fermi level tuning is central to graphene electronics. Here, an optical pump-terahertz (THz) probe spectroscopy is applied to investigate ultrafast sheet conductivity dynamics in various epitaxially grown graphene layers representing a large variety of carbon allotropes, including H2 intercalated films. The graphene layers display a prominent plasmonic response connected with induced THz transparency spectra on ultrashort timescale. It is shown that the plasmonic confinement potentials act within micrometer-sized domains with essentially isotropic character. The measured ultrafast dynamics are entirely controlled by the quasi-Fermi level of laser-excited carriers through their temperature. The photocarriers undergo a disorder-enabled super-collision cooling process with an initial picosecond transfer of the optically deposited heat to the lattice followed by a sub-nanosecond relaxation governed by the lattice cooling.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Functional Materials

ISSN

1616-301X

e-ISSN

1616-3028

Svazek periodika

31

Číslo periodika v rámci svazku

45

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

13

Strana od-do

2105763

Kód UT WoS článku

000682388400001

EID výsledku v databázi Scopus

2-s2.0-85112650617