Circularly Polarized Luminescence Without External Magnetic Fields from Individual CsPbBr3 Perovskite Quantum Dots
dc.contributor.author
Oddi, Virginia
dc.contributor.author
Zhu, Chenglian
dc.contributor.author
Becker, Michael A.
dc.contributor.author
Sahin, Yesim
dc.contributor.author
Dirin, Dmitry N.
dc.contributor.author
Kim, Taehee
dc.contributor.author
Mahrt, Rainer F.
dc.contributor.author
Even, Jacky
dc.contributor.author
Rainò, Gabriele
dc.contributor.author
Kovalenko, Maksym V.
dc.contributor.author
Stöferle, Thilo
dc.date.accessioned
2024-07-03T08:04:30Z
dc.date.available
2024-07-03T05:55:24Z
dc.date.available
2024-07-03T08:04:30Z
dc.date.issued
2024-07-02
dc.identifier.issn
1936-0851
dc.identifier.issn
1936-086X
dc.identifier.other
10.1021/acsnano.4c04392
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/681241
dc.identifier.doi
10.3929/ethz-b-000681241
dc.description.abstract
Lead halide perovskite quantum dots (QDs), the latest generation of the colloidal QD family, exhibit outstanding optical properties, which are now exploited as both classical and quantum light sources. Most of their rather exceptional properties are related to the peculiar exciton fine-structure of band-edge states, which can support unique bright triplet excitons. The degeneracy of the bright triplet excitons is lifted with energetic splitting in the order of millielectronvolts, which can be resolved by the photoluminescence (PL) measurements of single QDs at cryogenic temperatures. Each bright exciton fine-structure-state (FSS) exhibits a dominantly linear polarization, in line with several theoretical models based on the sole crystal field, exchange interaction, and shape anisotropy. Here, we show that in addition to a high degree of linear polarization, the individual exciton FSS can exhibit a non-negligible degree of circular polarization even without external magnetic fields by investigating the four Stokes parameters of the exciton fine-structure in individual CsPbBr3 QDs through Stokes polarimetric measurements. We observe a degree of circular polarization up to similar to 38%, which could not be detected by using the conventional polarimetric technique. In addition, we found a consistent transition from left- to right-hand circular polarization within the fine-structure triplet manifold, which was observed in magnetic-field-dependent experiments. Our optical investigation provides deeper insights into the nature of the exciton fine structures and thereby drives the yet-incomplete understanding of the unique photophysical properties of this class of QDs for the benefit of future applications in chiral quantum optics.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
perovskite
en_US
dc.subject
quantum dots
en_US
dc.subject
exciton fine-structure
en_US
dc.subject
circularly polarized luminescence
en_US
dc.subject
Stokes parameters
en_US
dc.subject
Rashba effect
en_US
dc.title
Circularly Polarized Luminescence Without External Magnetic Fields from Individual CsPbBr3 Perovskite Quantum Dots
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2024-06-21
ethz.journal.title
ACS Nano
ethz.journal.volume
18
en_US
ethz.journal.issue
26
en_US
ethz.journal.abbreviated
ACS Nano
ethz.pages.start
17218
en_US
ethz.pages.end
17227
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Q-Light - Engineered Quantum Light Sources with Nanocrystal Assemblies
en_US
ethz.grant
Perovskite Semiconductors for Photonics
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.status
published
en_US
ethz.grant.agreementno
192308
ethz.grant.agreementno
956270
ethz.grant.fundername
SNF
ethz.grant.fundername
EC
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100000780
ethz.grant.program
Projekte MINT
ethz.grant.program
H2020
ethz.date.deposited
2024-07-03T05:55:27Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2024-07-03T08:04:31Z
ethz.rosetta.lastUpdated
2024-07-03T08:04:31Z
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true
ethz.rosetta.versionExported
true
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Journal Article [130143]