High-Chirality Polariton Lasing from Symmetry-Broken Plasmonic Lattices

Chuchuan Hong; Zhaoyun Zheng; Shreya K. Patel; Teri W. Odom

doi:10.1021/acsnano.5c04290

High-Chirality Polariton Lasing from Symmetry-Broken Plasmonic Lattices

Chuchuan Hong, Zhaoyun Zheng, Shreya K. Patel, Teri W. Odom^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Chiral polariton lasing is a source of circularly polarized, energy-efficient coherent emission. However, generating high optical contrast of opposite handedness is challenging because excitonic gain materials show low circular dichroism at room temperature. In addition, highly chiral lasing requires the symmetry of the optical cavities to be broken, which can affect the resonance quality and result in low-chiral purity. Here, we report how plasmonic nanoparticle lattice cavities having mismatched dimer unit cells strongly coupled to CdSe nanoplatelets can facilitate polariton lasing with low threshold fluences (8 μJ/cm²) and high chiral purity (∼0.92). This lasing threshold is at least two times lower than that of other systems at room temperature, and the chirality approaches the theoretical maximum. These room-temperature characteristics are promising for using chiral polariton lasing in a broad range of applications, from spintronics to optoelectronics to quantum information processing.

Original language	English (US)
Pages (from-to)	18824-18832
Number of pages	9
Journal	ACS nano
Volume	19
Issue number	19
DOIs	https://doi.org/10.1021/acsnano.5c04290
State	Published - May 20 2025

Funding

This work was supported by the National Science Foundation (NSF) under DMR-2207215 (Z.Z., T.W.O.) and the Vannevar Bush Faculty Fellowship from the Department of Defense (DOD) under DOD N00014-17-1-3023 (C.H., T.W.O.). This work was supported in part by the NSF MPS-Ascend Postdoctoral Research Fellowship (Grant No. CHE-2316063, S.K.P.). This work made use of the NUFAB, EPIC, and SPID facilities of Northwestern University’s NUANCE center that has received support from the SHyNE Resource (Grant No. NSF ECCS-2025633), the IIN, Northwestern’s MRSEC Program (Grant No. NSF DMR-1720139), and MRI (Grant No. NSF DMR-1828676). Additionally, S.K.P. acknowledges support from the postdoctoral research fellowship from the International Institute of Nanotechnology at Northwestern University. This research was supported in part by the Quest high-performance computing facility at Northwestern University, which is jointly supported by the Office of the Provost, the Office for Research, and Northwestern University Information Technology.

Keywords

chiral lasing
exciton polariton
nanoparticle array
strong coupling
surface lattice resonance

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/acsnano.5c04290

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title = "High-Chirality Polariton Lasing from Symmetry-Broken Plasmonic Lattices",

abstract = "Chiral polariton lasing is a source of circularly polarized, energy-efficient coherent emission. However, generating high optical contrast of opposite handedness is challenging because excitonic gain materials show low circular dichroism at room temperature. In addition, highly chiral lasing requires the symmetry of the optical cavities to be broken, which can affect the resonance quality and result in low-chiral purity. Here, we report how plasmonic nanoparticle lattice cavities having mismatched dimer unit cells strongly coupled to CdSe nanoplatelets can facilitate polariton lasing with low threshold fluences (8 μJ/cm2) and high chiral purity (∼0.92). This lasing threshold is at least two times lower than that of other systems at room temperature, and the chirality approaches the theoretical maximum. These room-temperature characteristics are promising for using chiral polariton lasing in a broad range of applications, from spintronics to optoelectronics to quantum information processing.",

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AU - Patel, Shreya K.

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PY - 2025/5/20

Y1 - 2025/5/20

N2 - Chiral polariton lasing is a source of circularly polarized, energy-efficient coherent emission. However, generating high optical contrast of opposite handedness is challenging because excitonic gain materials show low circular dichroism at room temperature. In addition, highly chiral lasing requires the symmetry of the optical cavities to be broken, which can affect the resonance quality and result in low-chiral purity. Here, we report how plasmonic nanoparticle lattice cavities having mismatched dimer unit cells strongly coupled to CdSe nanoplatelets can facilitate polariton lasing with low threshold fluences (8 μJ/cm2) and high chiral purity (∼0.92). This lasing threshold is at least two times lower than that of other systems at room temperature, and the chirality approaches the theoretical maximum. These room-temperature characteristics are promising for using chiral polariton lasing in a broad range of applications, from spintronics to optoelectronics to quantum information processing.

AB - Chiral polariton lasing is a source of circularly polarized, energy-efficient coherent emission. However, generating high optical contrast of opposite handedness is challenging because excitonic gain materials show low circular dichroism at room temperature. In addition, highly chiral lasing requires the symmetry of the optical cavities to be broken, which can affect the resonance quality and result in low-chiral purity. Here, we report how plasmonic nanoparticle lattice cavities having mismatched dimer unit cells strongly coupled to CdSe nanoplatelets can facilitate polariton lasing with low threshold fluences (8 μJ/cm2) and high chiral purity (∼0.92). This lasing threshold is at least two times lower than that of other systems at room temperature, and the chirality approaches the theoretical maximum. These room-temperature characteristics are promising for using chiral polariton lasing in a broad range of applications, from spintronics to optoelectronics to quantum information processing.

KW - chiral lasing

KW - exciton polariton

KW - nanoparticle array

KW - strong coupling

KW - surface lattice resonance

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High-Chirality Polariton Lasing from Symmetry-Broken Plasmonic Lattices

Abstract

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Keywords

ASJC Scopus subject areas

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