Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature

Two-dimensional transition metal dichalcogenides host strongly bound excitonic quasiparticles whose optical response can be tailored by external perturbations. Strain gradients, in particular, provide a powerful route to control exciton-to-trion conversion with nanometric precision, opening opportun...

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Detalles Bibliográficos
Autores: Fernández Martínez, Javier, Kyvelos, Nikolaos, Van Der Meulen, Herko Piet, López Polín, Guillermo, Hernández Pinilla, David, Ares García, Pablo, Tserkezis, Christos, Ramírez Herrero, María de la O, Bausa López, Luisa Eugenia
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:dnet:biblosearchi::ffe6a53f6a0dd053a798cf13364bf4a0
Acceso en línea:https://hdl.handle.net/10486/767080
https://dx.doi.org/10.1016/j.jlumin.2025.121727
Access Level:acceso abierto
Palabra clave:Exciton-to-trion conversion
monolayer MoS 2 Ag nanoparticle chain
strain engineering
low-temperature photoluminescence
Física
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spelling Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperatureFernández Martínez, JavierKyvelos, NikolaosVan Der Meulen, Herko PietLópez Polín, GuillermoHernández Pinilla, DavidAres García, PabloTserkezis, ChristosRamírez Herrero, María de la OBausa López, Luisa EugeniaExciton-to-trion conversionmonolayer MoS 2 Ag nanoparticle chainstrain engineeringlow-temperature photoluminescenceFísicaTwo-dimensional transition metal dichalcogenides host strongly bound excitonic quasiparticles whose optical response can be tailored by external perturbations. Strain gradients, in particular, provide a powerful route to control exciton-to-trion conversion with nanometric precision, opening opportunities for excitonic circuitry. Here, we probe nanometrically localized strain fields in monolayer MoS2 transferred onto a linear chain of Ag nanoparticles on LiNbO3 substrates. The nanoparticle chain induces one-dimensional nanoscale strain gradients in the monolayer while its plasmonic resonance remains spectrally detuned from the MoS2 excitonic transitions, ensuring that the observed response arises purely from strain-induced effects. Room temperature spatially resolved photoluminescence shows strain-driven modifications of the excitonic response, consistent with the predicted strain distribution. However, at cryogenic temperatures, the trion-to-exciton emission ratio increases significantly, by around an order of magnitude, near the Ag nanoparticle chain. This indicates a highly efficient, nanometrically localized exciton-to-trion conversion mainly driven by the enhanced strain gradients and the increased funneling efficiency at cryogenic temperatures, where the relative role of drift, and hence funneling efficiency, increases. The results provide direct experimental evidence of the effects of nanoscale, strain-driven trion manipulation at low temperature, achieved without the need for electric gates or advanced lithographic patterning, and underscores nanometer-wide wrinkles formed by the nanoparticle chain as a scalable and versatile strain-engineered platform for reconfigurable excitonic devices and quantum optoelectronicsJ.F.-M., C.T., D.H.-P., M.R., and L.E.B. acknowledge funding from the Spanish State Research Agency MICIU/AEI/10.13039/501100011033 under grant PID2022-137444NB-I00. G.L-P. acknowledges financial support from the Spanish State Research Agency under grant PID2022- 138908NB-C32 and the Ramón y Cajal contract RYC2023-044003-I. H. P-M. acknowledge funding from the Spanish State Research Agency under grant PID2023-148061NB-I00. P.A acknowledges funding from the Spanish State Research Agency under grants PID2022-142331NB- I00, TED2021-132219A-I00, CNS2023-143713, Ramón y Cajal fellowship RYC2020-030302-I and also from the European Research Council (ERC) Starting Grant (GA 101163902 - HeaT2Defects). The Center for Polariton-driven Light–Matter Interactions (POLIMA) is sponsored by the Danish National Research Foundation (Project No. DNRF165). The authors acknowledge Spanish Research Agency under grant “Maria de Maeztu” Program for Units of Excellence in R&D CEX2023-001316-MElsevierFacultad de CienciasDepartamento de Física de MaterialesDepartamento de Física de la Materia CondensadaEspectroscopía Láser (EXP C-054)Óptica Cuántica en Nanoestructuras SemiconductorasAgencia Estatal de InvestigaciónEuropean CommissionEuropean Research Council20252025-12-30research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10486/767080https://dx.doi.org/10.1016/j.jlumin.2025.121727reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dnet:biblosearchi::ffe6a53f6a0dd053a798cf13364bf4a02026-06-23T12:46:27Z
dc.title.none.fl_str_mv Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
title Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
spellingShingle Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
Fernández Martínez, Javier
Exciton-to-trion conversion
monolayer MoS 2 Ag nanoparticle chain
strain engineering
low-temperature photoluminescence
Física
title_short Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
title_full Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
title_fullStr Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
title_full_unstemmed Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
title_sort Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature
dc.creator.none.fl_str_mv Fernández Martínez, Javier
Kyvelos, Nikolaos
Van Der Meulen, Herko Piet
López Polín, Guillermo
Hernández Pinilla, David
Ares García, Pablo
Tserkezis, Christos
Ramírez Herrero, María de la O
Bausa López, Luisa Eugenia
author Fernández Martínez, Javier
author_facet Fernández Martínez, Javier
Kyvelos, Nikolaos
Van Der Meulen, Herko Piet
López Polín, Guillermo
Hernández Pinilla, David
Ares García, Pablo
Tserkezis, Christos
Ramírez Herrero, María de la O
Bausa López, Luisa Eugenia
author_role author
author2 Kyvelos, Nikolaos
Van Der Meulen, Herko Piet
López Polín, Guillermo
Hernández Pinilla, David
Ares García, Pablo
Tserkezis, Christos
Ramírez Herrero, María de la O
Bausa López, Luisa Eugenia
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Facultad de Ciencias
Departamento de Física de Materiales
Departamento de Física de la Materia Condensada
Espectroscopía Láser (EXP C-054)
Óptica Cuántica en Nanoestructuras Semiconductoras
Agencia Estatal de Investigación
European Commission
European Research Council
dc.subject.none.fl_str_mv Exciton-to-trion conversion
monolayer MoS 2 Ag nanoparticle chain
strain engineering
low-temperature photoluminescence
Física
topic Exciton-to-trion conversion
monolayer MoS 2 Ag nanoparticle chain
strain engineering
low-temperature photoluminescence
Física
description Two-dimensional transition metal dichalcogenides host strongly bound excitonic quasiparticles whose optical response can be tailored by external perturbations. Strain gradients, in particular, provide a powerful route to control exciton-to-trion conversion with nanometric precision, opening opportunities for excitonic circuitry. Here, we probe nanometrically localized strain fields in monolayer MoS2 transferred onto a linear chain of Ag nanoparticles on LiNbO3 substrates. The nanoparticle chain induces one-dimensional nanoscale strain gradients in the monolayer while its plasmonic resonance remains spectrally detuned from the MoS2 excitonic transitions, ensuring that the observed response arises purely from strain-induced effects. Room temperature spatially resolved photoluminescence shows strain-driven modifications of the excitonic response, consistent with the predicted strain distribution. However, at cryogenic temperatures, the trion-to-exciton emission ratio increases significantly, by around an order of magnitude, near the Ag nanoparticle chain. This indicates a highly efficient, nanometrically localized exciton-to-trion conversion mainly driven by the enhanced strain gradients and the increased funneling efficiency at cryogenic temperatures, where the relative role of drift, and hence funneling efficiency, increases. The results provide direct experimental evidence of the effects of nanoscale, strain-driven trion manipulation at low temperature, achieved without the need for electric gates or advanced lithographic patterning, and underscores nanometer-wide wrinkles formed by the nanoparticle chain as a scalable and versatile strain-engineered platform for reconfigurable excitonic devices and quantum optoelectronics
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-12-30
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10486/767080
https://dx.doi.org/10.1016/j.jlumin.2025.121727
url https://hdl.handle.net/10486/767080
https://dx.doi.org/10.1016/j.jlumin.2025.121727
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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