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Title: Nano-optical imaging of WS e 2 waveguide modes revealing light-exciton interactions

Abstract

We report on a nano-optical imaging study of WSe2 thin flakes with scanning near-field optical microscopy (NSOM). The NSOM technique allows us to visualize in real space various waveguide photon modes inside WSe2. By tuning the excitation laser energy, we are able to map the entire dispersion of these waveguide modes both above and below the A exciton energy of WSe2. We found that all the modes interact strongly with WSe2 excitons. The outcome of the interaction is that the observed waveguide modes shift to higher momenta right below the A exciton energy. At higher energies, on the other hand, these modes are strongly damped due to adjacent B excitons or band-edge absorptions. Furthermore, the mode-shifting phenomena are consistent with polariton formation in WSe2.

Authors:
 [1];  [2];  [3];  [4];  [5];  [5];  [3];  [6];  [6];  [3];  [3];  [3];  [6];  [3];  [2]
  1. Argonne National Lab. (ANL), Lemont, IL (United States); Iowa State Univ., Ames, IA (United States)
  2. Univ. of Washington, Seattle, WA (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States); William Paterson Univ., Wayne, NJ (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  6. Fudan Univ., Shanghai (China)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1369571
Alternate Identifier(s):
OSTI ID: 1280187; OSTI ID: 1376353
Grant/Contract Number:  
AC02-06CH11357; AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 8; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Fei, Z., Scott, M. E., Gosztola, D. J., Foley, IV, J. J., Yan, J., Mandrus, D. G., Wen, H., Zhou, P., Zhang, D. W., Sun, Y., Guest, J. R., Gray, S. K., Bao, W., Wiederrecht, G. P., and Xu, X. Nano-optical imaging of WSe2 waveguide modes revealing light-exciton interactions. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.081402.
Fei, Z., Scott, M. E., Gosztola, D. J., Foley, IV, J. J., Yan, J., Mandrus, D. G., Wen, H., Zhou, P., Zhang, D. W., Sun, Y., Guest, J. R., Gray, S. K., Bao, W., Wiederrecht, G. P., & Xu, X. Nano-optical imaging of WSe2 waveguide modes revealing light-exciton interactions. United States. https://doi.org/10.1103/PhysRevB.94.081402
Fei, Z., Scott, M. E., Gosztola, D. J., Foley, IV, J. J., Yan, J., Mandrus, D. G., Wen, H., Zhou, P., Zhang, D. W., Sun, Y., Guest, J. R., Gray, S. K., Bao, W., Wiederrecht, G. P., and Xu, X. 2016. "Nano-optical imaging of WSe2 waveguide modes revealing light-exciton interactions". United States. https://doi.org/10.1103/PhysRevB.94.081402. https://www.osti.gov/servlets/purl/1369571.
@article{osti_1369571,
title = {Nano-optical imaging of WSe2 waveguide modes revealing light-exciton interactions},
author = {Fei, Z. and Scott, M. E. and Gosztola, D. J. and Foley, IV, J. J. and Yan, J. and Mandrus, D. G. and Wen, H. and Zhou, P. and Zhang, D. W. and Sun, Y. and Guest, J. R. and Gray, S. K. and Bao, W. and Wiederrecht, G. P. and Xu, X.},
abstractNote = {We report on a nano-optical imaging study of WSe2 thin flakes with scanning near-field optical microscopy (NSOM). The NSOM technique allows us to visualize in real space various waveguide photon modes inside WSe2. By tuning the excitation laser energy, we are able to map the entire dispersion of these waveguide modes both above and below the A exciton energy of WSe2. We found that all the modes interact strongly with WSe2 excitons. The outcome of the interaction is that the observed waveguide modes shift to higher momenta right below the A exciton energy. At higher energies, on the other hand, these modes are strongly damped due to adjacent B excitons or band-edge absorptions. Furthermore, the mode-shifting phenomena are consistent with polariton formation in WSe2.},
doi = {10.1103/PhysRevB.94.081402},
url = {https://www.osti.gov/biblio/1369571}, journal = {Physical Review B},
issn = {2469-9950},
number = 8,
volume = 94,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 2016},
month = {Mon Aug 01 00:00:00 EDT 2016}
}

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Cited by: 62 works
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Works referenced in this record:

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Works referencing / citing this record:

A Multibeam Interference Model for Analyzing Complex Near‐Field Images of Polaritons in 2D van der Waals Microstructures
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Tunable Modal Birefringence in a Low‐Loss Van Der Waals Waveguide
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Plasmonic Nanolasers: Pursuing Extreme Lasing Conditions on Nanoscale
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Scaling and Reflection Behaviors of Polaritons in Low‐Dimensional Materials
journal, September 2019


Recent Progress on Exciton Polaritons in Layered Transition‐Metal Dichalcogenides
journal, September 2019


Nanoimaging and Nanospectroscopy of Polaritons with Time Resolved s ‐SNOM
journal, September 2019


Polariton Photonics Using Structured Metals and 2D Materials
journal, October 2019


Probing Polaritons in 2D Materials
journal, January 2020


Polaritons in layered two-dimensional materials
journal, November 2016


Imaging exciton–polariton transport in MoSe2 waveguides
journal, May 2017


Polariton hyperspectral imaging of two-dimensional semiconductor crystals
journal, September 2019


Strong light–matter interaction in tungsten disulfide nanotubes
journal, January 2018


Near-field exciton imaging of chemically treated MoS 2 monolayers
journal, January 2018


Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of W S 2 nanotubes
journal, October 2019


Transient exciton-polariton dynamics in WSe 2 by ultrafast near-field imaging
journal, February 2019


Polaritons in van der Waals materials
journal, October 2016


Strong interaction of quantum emitters with a WS 2 layer enhanced by a gold substrate
journal, January 2019


Polariton hyperspectral imaging of two-dimensional semiconductor crystals
text, January 2019