Ultrafast Exciton and Charge Carrier Dynamics in Monolayer MoS2 Measured with Time-Resolved Spectroscopic Ellipsometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F10974938%3A_____%2F25%3A25_88_01" target="_blank" >RIV/10974938:_____/25:25_88_01 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/pssb.202400547" target="_blank" >https://doi.org/10.1002/pssb.202400547</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/pssb.202400547" target="_blank" >10.1002/pssb.202400547</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultrafast Exciton and Charge Carrier Dynamics in Monolayer MoS2 Measured with Time-Resolved Spectroscopic Ellipsometry

Popis výsledku v původním jazyce

Due to their unique optical properties, 2D monolayer transition metal dichalcogenides (TMDCs) show great potential for future electronic and photonic devices, but for real applications, the performance of those is still in need of improvement at the moment. Understanding the exciton and charge carrier dynamics in TMDCs plays a key role in device applications, especially as photonic devices operate under strongly nonequilibrium conditions, as well as for fundamental understanding of the TMDC materials. By employing pump-probe femtosecond time-resolved spectroscopic ellipsometry, the ultrafast exciton/charge carrier dynamics in monolayer MoS2 by studying their impact on the materials dielectric function as a function of time is investigated. From the experiments and analysis of the time-dependent changes in the dielectric function after laser-excitation, a comprehensive model of the dynamics of the excitons, trions, and charge carriers within the Brillouin zone of the electronic structure is derived. The formation of trions, carrier scattering processes between the Gamma- and K-point of the Brillouin zone, arising of new intravalence and intraconduction band transitions, carrier relaxation within the bands, as well as recombination processes are found.

Název v anglickém jazyce

Ultrafast Exciton and Charge Carrier Dynamics in Monolayer MoS2 Measured with Time-Resolved Spectroscopic Ellipsometry

Popis výsledku anglicky

Due to their unique optical properties, 2D monolayer transition metal dichalcogenides (TMDCs) show great potential for future electronic and photonic devices, but for real applications, the performance of those is still in need of improvement at the moment. Understanding the exciton and charge carrier dynamics in TMDCs plays a key role in device applications, especially as photonic devices operate under strongly nonequilibrium conditions, as well as for fundamental understanding of the TMDC materials. By employing pump-probe femtosecond time-resolved spectroscopic ellipsometry, the ultrafast exciton/charge carrier dynamics in monolayer MoS2 by studying their impact on the materials dielectric function as a function of time is investigated. From the experiments and analysis of the time-dependent changes in the dielectric function after laser-excitation, a comprehensive model of the dynamics of the excitons, trions, and charge carriers within the Brillouin zone of the electronic structure is derived. The formation of trions, carrier scattering processes between the Gamma- and K-point of the Brillouin zone, arising of new intravalence and intraconduction band transitions, carrier relaxation within the bands, as well as recombination processes are found.

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

<a href="/cs/project/EF16_019%2F0000789" target="_blank" >EF16_019/0000789: Pokročilý výzkum s využitím fotonů a částic vytvořených vysoce intenzivními lasery</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS

ISSN

0370-1972

e-ISSN

1521-3951

Svazek periodika

262

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

2400547

Kód UT WoS článku

001407381300001

EID výsledku v databázi Scopus

2-s2.0-85216230918