Probing strongly coupled quasiparticle excitations at their intrinsic length scales offers unique insights into their properties and facilitates the design of devices with novel functionalities. In this work, we investigate the formation and emission characteristics of plexcitons, arising from the interaction between surface plasmons in narrow gold nanotrenches and excitons in monolayer WSe 2 . We study this strong plasmon–exciton coupling in both the far-field and the near-field. Specifically, we observe a Rabi splitting in the far-field reflection spectra of about 80 meV under ambient conditions, consistent with our theoretical modeling. Using a custom-designed near-field probe, we find that plexciton emission originates predominantly from the lower-frequency branch, which we can directly probe and map its local field distribution. We precisely determine the plexcitonʼs spatial extension, similar to the trench width, with nanometric precision by collecting spectra at controlled probe locations. Our work opens exciting prospects for nanoscale mapping and engineering of plexcitons in complex nanostructures with potential applications in nanophotonic devices, optoelectronics, and quantum electrodynamics in nanoscale cavities.
Zhou, Junze, Gonçalves, P. A. D., Riminucci, Fabrizio, Dhuey, Scott, S. Barnard, Edward, Schwartzberg, Adam, García de Abajo, F. Javier, & Weber-Bargioni, Alexander (2024). Probing plexciton emission from 2D materials on gold nanotrenches. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-53669-5
Zhou, Junze, Gonçalves, P. A. D., Riminucci, Fabrizio, et al., "Probing plexciton emission from 2D materials on gold nanotrenches," Nature Communications 15, no. 1 (2024), https://doi.org/10.1038/s41467-024-53669-5
@article{osti_2476414,
author = {Zhou, Junze and Gonçalves, P. A. D. and Riminucci, Fabrizio and Dhuey, Scott and S. Barnard, Edward and Schwartzberg, Adam and García de Abajo, F. Javier and Weber-Bargioni, Alexander},
title = {Probing plexciton emission from 2D materials on gold nanotrenches},
annote = {Abstract Probing strongly coupled quasiparticle excitations at their intrinsic length scales offers unique insights into their properties and facilitates the design of devices with novel functionalities. In this work, we investigate the formation and emission characteristics of plexcitons, arising from the interaction between surface plasmons in narrow gold nanotrenches and excitons in monolayer WSe 2 . We study this strong plasmon–exciton coupling in both the far-field and the near-field. Specifically, we observe a Rabi splitting in the far-field reflection spectra of about 80 meV under ambient conditions, consistent with our theoretical modeling. Using a custom-designed near-field probe, we find that plexciton emission originates predominantly from the lower-frequency branch, which we can directly probe and map its local field distribution. We precisely determine the plexcitonʼs spatial extension, similar to the trench width, with nanometric precision by collecting spectra at controlled probe locations. Our work opens exciting prospects for nanoscale mapping and engineering of plexcitons in complex nanostructures with potential applications in nanophotonic devices, optoelectronics, and quantum electrodynamics in nanoscale cavities. },
doi = {10.1038/s41467-024-53669-5},
url = {https://www.osti.gov/biblio/2476414},
journal = {Nature Communications},
issn = {ISSN 2041-1723},
number = {1},
volume = {15},
place = {United Kingdom},
publisher = {Nature Publishing Group},
year = {2024},
month = {11}}
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 362, Issue 1817https://doi.org/10.1098/rsta.2003.1347