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Highly nonlinear dipolar exciton-polaritons in bilayer MoS2A

Highly nonlinear dipolar exciton-polaritons in bilayer MoS2A
Highly nonlinear dipolar exciton-polaritons in bilayer MoS2A
Realizing nonlinear optical response in the low photon density limit in solid-state systems has been a long-standing challenge. Semiconductor microcavities in the strong coupling regime hosting exciton-polaritons have emerged as attractive candidates in this context. However, the weak interaction between these quasiparticles has been a hurdle in this quest. Dipolar excitons provide an attractive strategy to overcome this limitation but are often hindered by their weak oscillator strength. The interlayer dipolar excitons in naturally occurring homobilayer MoS2 alleviates this issue owing to their formation via hybridization of interlayer charge transfer exciton with intralayer B exciton. Here we demonstrate the formation of dipolar exciton polaritons in bilayer MoS2 resulting in unprecedented nonlinear interaction strengths. A ten-fold increase in nonlinearity is observed for the interlayer dipolar excitons compared to the conventional A excitons. These highly nonlinear dipolar polaritons will likely be a frontrunner in the quest for solid-state quantum nonlinear devices.
2041-1723
Datta, Biswajit
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Khatoniar, Mandeep
f91285b1-bb1a-49dd-b78d-64fc9fe10cf1
Deshmukh, Prathmesh
b39027e8-bbf7-45eb-a9d4-76455ff6b9e3
Thouin, Felix
73b8ec2d-da97-4ac6-b2ac-70b839b4a6b6
Bushati, Rezlind
07df44ea-708e-4b85-9818-f0913a6da979
De Liberato, Simone
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Cohen, Stephane Kena
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Menon, Vinod M.
7068ef55-31f4-4e90-9d0b-4276963e6787
Datta, Biswajit
90fbe444-5822-46e8-9b0e-f645a32625ed
Khatoniar, Mandeep
f91285b1-bb1a-49dd-b78d-64fc9fe10cf1
Deshmukh, Prathmesh
b39027e8-bbf7-45eb-a9d4-76455ff6b9e3
Thouin, Felix
73b8ec2d-da97-4ac6-b2ac-70b839b4a6b6
Bushati, Rezlind
07df44ea-708e-4b85-9818-f0913a6da979
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Cohen, Stephane Kena
2ca3a612-e4f4-47aa-97a2-4995167dcf73
Menon, Vinod M.
7068ef55-31f4-4e90-9d0b-4276963e6787

Datta, Biswajit, Khatoniar, Mandeep, Deshmukh, Prathmesh, Thouin, Felix, Bushati, Rezlind, De Liberato, Simone, Cohen, Stephane Kena and Menon, Vinod M. (2022) Highly nonlinear dipolar exciton-polaritons in bilayer MoS2A. Nature Communications, 13 (6341), [6341]. (doi:10.1038/s41467-022-33940-3).

Record type: Article

Abstract

Realizing nonlinear optical response in the low photon density limit in solid-state systems has been a long-standing challenge. Semiconductor microcavities in the strong coupling regime hosting exciton-polaritons have emerged as attractive candidates in this context. However, the weak interaction between these quasiparticles has been a hurdle in this quest. Dipolar excitons provide an attractive strategy to overcome this limitation but are often hindered by their weak oscillator strength. The interlayer dipolar excitons in naturally occurring homobilayer MoS2 alleviates this issue owing to their formation via hybridization of interlayer charge transfer exciton with intralayer B exciton. Here we demonstrate the formation of dipolar exciton polaritons in bilayer MoS2 resulting in unprecedented nonlinear interaction strengths. A ten-fold increase in nonlinearity is observed for the interlayer dipolar excitons compared to the conventional A excitons. These highly nonlinear dipolar polaritons will likely be a frontrunner in the quest for solid-state quantum nonlinear devices.

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s41467-022-33940-3 - Version of Record
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Accepted/In Press date: 7 October 2022
Published date: 25 October 2022

Identifiers

Local EPrints ID: 471786
URI: http://eprints.soton.ac.uk/id/eprint/471786
ISSN: 2041-1723
PURE UUID: e293588d-3506-4913-96a2-80dc2cd6cb44
ORCID for Simone De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

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Date deposited: 18 Nov 2022 17:39
Last modified: 23 Nov 2022 02:43

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Contributors

Author: Biswajit Datta
Author: Mandeep Khatoniar
Author: Prathmesh Deshmukh
Author: Felix Thouin
Author: Rezlind Bushati
Author: Stephane Kena Cohen
Author: Vinod M. Menon

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