Interspecies exciton interactions lead to enhanced nonlinearity of dipolar excitons and polaritons in MoSâ‚‚ bilayers
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{
"id": "1776",
"updated": "2023-06-02T13:03:44.035146+00:00",
"metadata": {
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"contributors": [
{
"givennames": "Charalambos",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK"
],
"email": "charalambos.louca@polimi.it",
"familyname": "Louca"
},
{
"givennames": "Armando",
"affiliations": [
"Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milano, 20133, Italy"
],
"email": "armando.genco@polimi.it",
"familyname": "Genco"
},
{
"givennames": "Salvatore",
"affiliations": [
"Department of Physics, University of Exeter, Stocker Road, Exeter, EX4 4PY, UK"
],
"familyname": "Chiavazzo"
},
{
"givennames": "Thomas",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK",
"RIKEN Center for Emergent Matter Science, Wako, Saitama, 351-0198, Japan"
],
"familyname": "P. Lyons"
},
{
"givennames": "Sam",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK"
],
"familyname": "Randerson"
},
{
"givennames": "Chiara",
"affiliations": [
"Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milano, 20133, Italy"
],
"familyname": "Trovatello"
},
{
"givennames": "Peter",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK",
"Department of Physics and Mathematics, University of Hull, Rober Blackburn, Hull HU6 7RX, UK"
],
"familyname": "Claronino"
},
{
"givennames": "Rahul",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK"
],
"familyname": "Jayaprakash"
},
{
"givennames": "Xuerong",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK"
],
"familyname": "Hu"
},
{
"givennames": "James",
"affiliations": [
"National Graphene Institute, University of Manchester, Manchester, UK",
"Department of Physics and Astronomy, University of Manchester, Manchester, UK"
],
"familyname": "Howarth"
},
{
"givennames": "Kenji",
"affiliations": [
"Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan"
],
"familyname": "Watanabe"
},
{
"givennames": "Takashi",
"affiliations": [
"Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan"
],
"familyname": "Taniguchi"
},
{
"givennames": "Stefano",
"affiliations": [
"Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milano, 20133, Italy"
],
"familyname": "Dal Conte"
},
{
"givennames": "Roman",
"affiliations": [
"National Graphene Institute, University of Manchester, Manchester, UK",
"Department of Physics and Astronomy, University of Manchester, Manchester, UK"
],
"familyname": "Gorbachev"
},
{
"givennames": "David",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK"
],
"familyname": "G. Lidzey"
},
{
"givennames": "Giulio",
"affiliations": [
"Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milano, 20133, Italy"
],
"familyname": "Cerullo"
},
{
"givennames": "Oleksandr",
"affiliations": [
"Department of Physics, University of Exeter, Stocker Road, Exeter, EX4 4PY, UK"
],
"familyname": "Kyriienko"
},
{
"givennames": "Alexander",
"affiliations": [
"Department of Physics and Astronomy, The University of Sheffield, Sheffield S3 7RH, UK"
],
"email": "a.tartakovskii@sheffield.ac.uk",
"familyname": "I. Tartakovskii"
}
],
"title": "Interspecies exciton interactions lead to enhanced nonlinearity of dipolar excitons and polaritons in MoS\u2082 bilayers",
"_oai": {
"id": "oai:materialscloud.org:1776"
},
"keywords": [
"2D materials",
"Experimental",
"Exciton-polaritons",
"H2020",
"RCUK",
"Marie Curie Fellowship"
],
"publication_date": "Jun 02, 2023, 15:03:44",
"_files": [
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"description": "RC spectrum of encapsulated MoS2 bilayer at low temperature",
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"description": "RC spectra of excitons in BL MoS2 detected in two circular polarizations in an out-of-plane magnetic field of 8 T at T = 4 K",
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"description": "Low temperature (4K) RC spectra measured as a function of the cavity-exciton detuning (\u2206 = Ecav\u2212Eexc) for cavity scans across XA energy",
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"description": "Low temperature (4K) RC spectra measured as a function of the cavity-exciton detuning (\u2206 = Ecav\u2212Eexc) for cavity scans across hIX energy",
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"description": "Waterfall plot of RC spectra measured for the cavity-exciton detunings in the vicinity of the anticrossing between hIX and the cavity mode.",
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"description": "Dipolariton dispersion measured with circularly polarized detection for 8 T magnetic field",
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"description": "RC spectra measured with the NB (FWHM=28 nm) excitation for the XA at different fluences",
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"description": "RC spectra measured with the NB (FWHM=28 nm) excitation for the hIX at different fluences",
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"description": "RC spectra measured with the BB (FWHM=50 nm) excitation at different fluences",
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"key": "Fig3d.xlsx",
"description": "The energy shift \u2206E (top) and normalized integrated intensity (bottom) as a function of the exciton density for the hIX (first worksheet) and XA (second worksheet)",
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"key": "Fig4a.xlsx",
"description": "Reflectance contrast dispersion spectra of the MoS2 bilayer placed in a monolithic cavity. The low fluence case (0.6 \u00b5J cm\u22122)",
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"description": "Reflectance contrast dispersion spectra of the MoS2 bilayer placed in a monolithic cavity. The high fluence case (58.5 \u00b5J cm\u22122 )",
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"description": "RC spectra measured at the anticrossing as a function of the laser fluence",
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{
"key": "Fig4de.xlsx",
"description": "Measured UPB , LPB peak energies and normalised Rabi splitting as a function of the laser fluence and the corresponding polariton density. Rabi splittings are normalised by the Rabi splitting obtained at the lowest fluence.",
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"references": [
{
"doi": "10.48550/arXiv.2204.00485",
"citation": "Louca C., Genco A. et al. \u201dNonlinear interactions of dipolar excitons and polaritons in MoS2 bilayers.\u201d arXiv preprint arXiv:2204.00485 (2022).",
"url": "https://doi.org/10.48550/arXiv.2204.00485",
"type": "Preprint"
}
],
"description": "Nonlinear interactions between excitons strongly coupled to light are key for accessing quantum many-body phenomena in polariton systems. Atomically-thin two-dimensional semiconductors provide an attractive platform for strong light-matter coupling owing to many controllable excitonic degrees of freedom. Among these, the recently emerged exciton hybridization opens access to unexplored excitonic species, with a promise of enhanced interactions. Here, we employ hybridized interlayer excitons (hIX) in bilayer MoS\u2082 to achieve highly nonlinear excitonic and polaritonic effects. Such interlayer excitons possess an out-of-plane electric dipole as well as an unusually large oscillator strength allowing observation of dipolar polaritons (dipolaritons) in bilayers in optical microcavities. Compared to excitons and polaritons in MoS\u2082 monolayers, both hIX and dipolaritons exhibit approximately 8 times higher nonlinearity, which is further strongly enhanced when hIX and intralayer excitons, sharing the same valence band, are excited simultaneously. This provides access to an unusual nonlinear regime which we describe theoretically as a mixed effect of Pauli exclusion and exciton-exciton interactions enabled through charge tunnelling. The presented insight into many-body interactions provides new tools for accessing few-polariton quantum correlations.",
"status": "published",
"license": "Materials Cloud non-exclusive license to distribute v1.0",
"conceptrecid": "1775",
"is_last": true,
"mcid": "2023.88",
"edited_by": 576,
"id": "1776",
"owner": 1037,
"license_addendum": null,
"doi": "10.24435/materialscloud:xm-bm"
},
"revision": 8,
"created": "2023-05-29T16:58:01.237919+00:00"
}