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dc.contributor.author
Abdelwahab, Ibrahim
dc.contributor.author
Dichtl, Paul
dc.contributor.author
Grinblat, Gustavo Sergio
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dc.contributor.author
Leng, Kai
dc.contributor.author
Chi, Xiao
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Park, In-Hyeok
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Nielsen, Michael P.
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Oulton, Rupert F.
dc.contributor.author
Loh, Kian Ping
dc.contributor.author
Maier, Stefan A.
dc.date.available
2021-11-26T15:08:53Z
dc.date.issued
2019-07
dc.identifier.citation
Abdelwahab, Ibrahim; Dichtl, Paul; Grinblat, Gustavo Sergio; Leng, Kai; Chi, Xiao; et al.; Giant and Tunable Optical Nonlinearity in Single-Crystalline 2D Perovskites due to Excitonic and Plasma Effects; Wiley VCH Verlag; Advanced Materials; 31; 29; 7-2019; 1-8
dc.identifier.issn
0935-9648
dc.identifier.uri
http://hdl.handle.net/11336/147508
dc.description.abstract
Materials with large optical nonlinearity, especially in the visible spectral region, are in great demand for applications in all-optical information processing and quantum optics. 2D hybrid Ruddlesden−Popper-type halide perovskites (RPPs) with tunable ultraviolet-to-visible direct bandgaps exhibit large nonlinear optical responses due to the strong excitonic effects present in their multiple quantum wells. Using a microscopic Z-scan setup with femtosecond laser pulses tunable across the visible spectrum, it is demonstrated that single-crystalline lead halide RPP nanosheets possess unprecedentedly large nonlinear refraction and absorption coefficients near excitonic resonances. A room-temperature insulator (exciton)–metal (plasma) Mott transition is found to occur near the exciton resonance of the thinnest qunatum-well RPPs, boosting the nonlinear response. Owing to the rapidly changing refractive index near resonance, a single RPP crystal can exhibit different nonlinear functionalities across the excitation spectrum. The results suggest that RPPs are efficient nonlinear materials in the visible waveband, indicating their potential use in integrated nonlinear photonic applications such as optical modulation and switching.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley VCH Verlag
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
2D RUDDLESDEN–POPPER PEROVSKITES
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EXCITONIC RESONANCE
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MOTT TRANSITION
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THIRD-ORDER OPTICAL NONLINEARITY
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Z-SCAN
dc.subject.classification
Nano-materiales
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dc.subject.classification
Nanotecnología
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Giant and Tunable Optical Nonlinearity in Single-Crystalline 2D Perovskites due to Excitonic and Plasma Effects
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-20T15:59:28Z
dc.journal.volume
31
dc.journal.number
29
dc.journal.pagination
1-8
dc.journal.pais
Alemania
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dc.journal.ciudad
Weinheim
dc.description.fil
Fil: Abdelwahab, Ibrahim. Imperial College London; Reino Unido. National University Of Singapore; Singapur
dc.description.fil
Fil: Dichtl, Paul. Imperial College London; Reino Unido
dc.description.fil
Fil: Grinblat, Gustavo Sergio. Imperial College London; Reino Unido
dc.description.fil
Fil: Leng, Kai. National University Of Singapore; Singapur
dc.description.fil
Fil: Chi, Xiao. National University Of Singapore; Singapur
dc.description.fil
Fil: Park, In-Hyeok. National University Of Singapore; Singapur
dc.description.fil
Fil: Nielsen, Michael P.. Imperial College London; Reino Unido
dc.description.fil
Fil: Oulton, Rupert F.. Imperial College London; Reino Unido
dc.description.fil
Fil: Loh, Kian Ping. National University Of Singapore; Singapur
dc.description.fil
Fil: Maier, Stefan A.. Imperial College London; Reino Unido
dc.journal.title
Advanced Materials
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201902685
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/adma.201902685
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