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Title: Ultrastrong Coupling of Band‐Nested Excitons in Few‐Layer Molybdenum Disulphide

Journal Article · · Advanced Optical Materials

Abstract The 2D transition‐metal dichalcogenides (2D TMDCs) are an intriguing platform for studying strong light–matter interactions because they combine the electronic properties of conventional semiconductors with the optical resonances found in organic systems. However, the coupling strengths demonstrated in strong exciton–polariton coupling in the 2D TMDCs remain much lower than those found in organic systems. In this paper, a new approach is taken by utilizing the large oscillator strength of the above‐band gap C exciton in few‐layer molybdenum disulphide (FL‐MoS 2 ). A k ‐space Rabi splitting of 293 meV is shown when coupling FL‐MoS 2 C excitons to surface plasmon polaritons at room temperature. This value is 11% of the uncoupled exciton energy (2.67 eV or 464 nm), ≈2× what is typically seen in the TMDCs, placing the system in the ultrastrong coupling regime. The results take a step toward finally achieving the efficient quantum coherent processes of ultrastrong coupling in a CMOS‐compatible system—the 2D TMDCs—in the visible spectrum.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1879895
Report Number(s):
NREL/JA-5900-82808; 2200485
Journal Information:
Advanced Optical Materials, Journal Name: Advanced Optical Materials Journal Issue: 20 Vol. 10; ISSN 2195-1071
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (61)

2D Transition-Metal-Dichalcogenide-Nanosheet-Based Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions journal December 2015
Ultrastrongly Coupled Exciton-Polaritons in Metal-Clad Organic Semiconductor Microcavities journal August 2013
Ultrastrong Coupling of Electrically Pumped Near-Infrared Exciton-Polaritons in High Mobility Polymers journal December 2017
Dispersion of Third‐Harmonic Generation in Organic Cavity Polaritons journal May 2019
Strong Light–Matter Interactions Enabled by Polaritons in Atomically Thin Materials journal January 2020
Modifying Chemical Landscapes by Coupling to Vacuum Fields journal January 2012
Semiempirical GGA-type density functional constructed with a long-range dispersion correction journal January 2006
Plasmonic Enhancement and Manipulation of Optical Nonlinearity in Monolayer Tungsten Disulfide journal August 2018
Slow Cooling of High‐Energy C Excitons Is Limited by Intervalley‐Transfer in Monolayer MoS 2 journal February 2019
Enhanced Strong Coupling of TMDC Monolayers by Bound State in the Continuum journal November 2021
On the Numerical Calculation of the Density of States and Related Properties journal December 1972
The PseudoDojo: Training and grading a 85 element optimized norm-conserving pseudopotential table journal May 2018
JDFTx: Software for joint density-functional theory journal January 2017
Polariton-Mediated Electron Transfer via Cavity Quantum Electrodynamics journal June 2020
Ultrastrong Coupling Leads to Slowed Cooling of Hot Excitons in Few-Layer Transition-Metal Dichalcogenides journal May 2022
Harmonic Generation by Metal Nanostructures Optically Coupled to Two-Dimensional Transition-Metal Dichalcogenide journal February 2019
Polariton Decay in Donor–Acceptor Cavity Systems journal October 2021
Tuning of Two-Dimensional Plasmon–Exciton Coupling in Full Parameter Space: A Polaritonic Non-Hermitian System journal March 2021
Ultralow Threshold Polariton Condensate in a Monolayer Semiconductor Microcavity at Room Temperature journal April 2021
Coherent Coupling of WS 2 Monolayers with Metallic Photonic Nanostructures at Room Temperature journal June 2016
High-Efficiency Second-Harmonic Generation from Hybrid Light-Matter States journal November 2016
Room-Temperature Strong Light–Matter Interaction with Active Control in Single Plasmonic Nanorod Coupled with Two-Dimensional Atomic Crystals journal July 2017
Observation of Tunable Charged Exciton Polaritons in Hybrid Monolayer WS 2 −Plasmonic Nanoantenna System journal January 2018
Synthesis and Transfer of Large-Area Monolayer WS 2 Crystals: Moving Toward the Recyclable Use of Sapphire Substrates journal May 2015
Wafer-Scale Growth and Transfer of Highly-Oriented Monolayer MoS 2 Continuous Films journal October 2016
Plasmon-Mediated Coherent Superposition of Discrete Excitons under Strong Exciton–Plasmon Coupling in Few-Layer MoS 2 at Room Temperature journal April 2020
Coupling between a Molecular Charge-Transfer Exciton and Surface Plasmons in a Nanostructured Metal Grating journal July 2013
Exploring Light–Matter Interaction Phenomena under Ultrastrong Coupling Regime journal September 2014
Sub-cycle switch-on of ultrastrong light–matter interaction journal March 2009
Even–odd layer-dependent magnetotransport of high-mobility Q-valley electrons in transition metal disulfides journal September 2016
Slow cooling and efficient extraction of C-exciton hot carriers in MoS2 monolayer journal January 2017
Photocarrier relaxation pathway in two-dimensional semiconducting transition metal dichalcogenides journal July 2014
Electronics and optoelectronics of two-dimensional transition metal dichalcogenides journal November 2012
Vacuum Rabi splitting in semiconductors journal February 2006
Exciton–polariton condensates journal October 2014
Strong-coupling of WSe2 in ultra-compact plasmonic nanocavities at room temperature journal November 2017
Virtual photons in the ground state of a dissipative system journal November 2017
Observation of bosonic condensation in a hybrid monolayer MoSe2-GaAs microcavity journal August 2018
Bosonic condensation of exciton–polaritons in an atomically thin crystal journal May 2021
Quantifying photoinduced carriers transport in exciton–polariton coupling of MoS2 monolayers journal April 2021
Ultrastrong coupling between light and matter journal January 2019
Strong plasmon–exciton coupling in transition metal dichalcogenides and plasmonic nanostructures journal January 2021
Strong coupling between surface plasmon polaritons and emitters: a review journal December 2014
Particularities of surface plasmon–exciton strong coupling with large Rabi splitting journal June 2008
Theory of the Contribution of Excitons to the Complex Dielectric Constant of Crystals journal December 1958
Optical Constants of the Noble Metals journal December 1972
Strong coupling between surface plasmon-polaritons and organic molecules in subwavelength hole arrays journal January 2005
Giant Rabi splitting between localized mixed plasmon-exciton states in a two-dimensional array of nanosize metallic disks in an organic semiconductor journal July 2009
Regularization of the Coulomb singularity in exact exchange by Wigner-Seitz truncated interactions: Towards chemical accuracy in nontrivial systems journal April 2013
Optimized norm-conserving Vanderbilt pseudopotentials journal August 2013
Band nesting and the optical response of two-dimensional semiconducting transition metal dichalcogenides journal September 2013
Reversible Switching of Ultrastrong Light-Molecule Coupling journal May 2011
Ab initio molecular dynamics: Analytically continued energy functionals and insights into iterative solutions journal August 1992
Control of Molecular Energy Redistribution Pathways via Surface Plasmon Gating journal February 2007
Room-Temperature Polariton Lasing in Semiconductor Microcavities journal March 2007
Physics and Device Applications of Optical Microcavities journal April 1992
Tilting a ground-state reactivity landscape by vibrational strong coupling journal February 2019
Dependence of Electronic and Optical Properties of MoS2 Multilayers on the Interlayer Coupling and Van Hove Singularity journal August 2019
Tuning surface plasmon-exciton coupling via thickness controlling of excitonic layer journal September 2021
Optical Constants of Silver Sulfide Tarnish Films* journal January 1970
Direct observation of strong light-exciton coupling in thin WS_2 flakes journal January 2016