Picosecond energy transfer in a transition metal dichalcogenide-graphene heterostructure revealed by transient Raman spectroscopy

no code implementations • 14 Jan 2021 • Carino Ferrante, Giorgio Di Battista, Luis E. Parra López, Giovanni Batignani, Etienne Lorchat, Alessandra Virga, Stéphane Berciaud, Tullio Scopigno

Intense light-matter interactions and unique structural and electrical properties make Van der Waals heterostructures composed by Graphene (Gr) and monolayer transition metal dichalcogenides (TMD) promising building blocks for tunnelling transistors, flexible electronics, as well as optoelectronic devices, including photodetectors, photovoltaics and quantum light emitting devices (QLEDs), bright and narrow-line emitters using minimal amounts of active absorber material.

Mesoscale and Nanoscale Physics Materials Science Optics

Single- and narrow-line photoluminescence in a boron nitride-supported MoSe$_2$/graphene heterostructure

no code implementations • 5 Nov 2020 • Luis E. Parra López, Loïc Moczko, Joanna Wolff, Aditya Singh, Etienne Lorchat, Michelangelo Romeo, Takashi Taniguchi, Kenji Watanabe, Stéphane Berciaud

Since this exciton has a picosecond radiative lifetime at low temperature, comparable with the energy transfer time, its low-temperature photoluminescence is only quenched by a factor of $3. 3 \pm 1$ and $4. 4 \pm 1$ in the presence of mono- and bilayer graphene, respectively.

Mesoscale and Nanoscale Physics Materials Science