Density-dependent excitonic properties and dynamics in 2D heterostructures consisting of boron nitride and monolayer or few-layer tungsten diselenide

Lorenz Maximilian Schneider, Jan Kuhnert, Sina Lippert, Dylan Renaud, Wolfram Heimbrodt, Obafunso Ajayi, Young Duck Kim, James C. Hone, Kyung Nam Kang, Eui Hyeok Yang, Arash Rahimi-Iman

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

1 Scopus citations

Abstract

The understanding of two-dimensional (2D) materials has grown tremendously, especially for isolated monolayers. Recently, complex structures formed by stacking 2D materials have attracted considerable attention. This is in part due to the fact that the properties of monolayers are known to be influenced by their surroundings. Consequently, monolayer properties are predicted to be affected by "heterostructuring". A study involving high-charge-carrier-density effects and dynamics is presented here for monolayers of WSe2 on different substrates and heterostructures comprised of 2D h-BN and WSe2. The influence of h-BN as well as the bilayer stacking order on the spectral and dynamical properties of WSe2-monolayer emission is discussed for the low-density regime and evidenced for high-density effects such as exciton-exciton annihilation and the Mott transition.

Original languageEnglish
Title of host publicationMicro- and Nanotechnology Sensors, Systems, and Applications X
EditorsM. Saif Islam, Thomas George, Achyut K. Dutta
ISBN (Electronic)9781510617896
DOIs
StatePublished - 2018
Event2018 Micro- and Nanotechnology (MNT) Sensors, Systems, and Applications X Conference - Orlando, United States
Duration: 15 Apr 201819 Apr 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10639
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2018 Micro- and Nanotechnology (MNT) Sensors, Systems, and Applications X Conference
Country/TerritoryUnited States
CityOrlando
Period15/04/1819/04/18

Keywords

  • 2D heterostructures
  • Boron nitride
  • Excitonic properties
  • Mott transition
  • Tungsten diselenide

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