Observation of hybrid Tamm-plasmon exciton- polaritons with GaAs quantum wells and a MoSe2 monolayer

Wurdack, Matthias; Lundt, Nils; Klaas, Martin; Baumann, Vasilij; Kavokin, Alexey; Höfling, Sven; Schneider, Christian

doi:10.1038/s41467-017-00155-w

Cited by 43 publications

(41 citation statements)

References 29 publications

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“…In the past decades, many attentions have been paid to plasmon-TMD-exciton systems for studying light-matter interactions, such as plasmon-induced resonance energy transfer 29,30 , tunable photoluminance by plasmon [31][32][33][34][35][36][37] and Fano resonance [38][39][40] . The strong plasmon-TMD-exciton coupling also has been investigated [41][42][43][44][45][46][47][48] . However, due to the intrinsic loss of the metal, the quality factor and cooperativity of plasmonic nanocavities are lower than those of conventional optical cavities, and therefore the reliable plasmon-exciton strong coupling has seldom been reported at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Large Rabi splitting obtained in Ag-WS2 strong-coupling heterostructure with optical microcavity at room temperature

Li¹,

Zu²,

Zhang³

et al. 2019

Opto-Electronic Advances

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Manipulation of light-matter interaction is critical in modern physics, especially in the strong coupling regime, where the generated half-light, half-matter bosonic quasiparticles as polaritons are important for fundamental quantum science and applications of optoelectronics and nonlinear optics. Two-dimensional transition metal dichalcogenides (TMDs) are ideal platforms to investigate the strong coupling because of their huge exciton binding energy and large absorption coefficients. Further studies on strong exciton-plasmon coupling by combining TMDs with metallic nanostructures have generated broad interests in recent years. However, because of the huge plasmon radiative damping, the observation of strong coupling is significantly limited at room temperature. Here, we demonstrate that a large Rabi splitting (~300 meV) can be achieved at ambient conditions in the strong coupling regime by embedding Ag-WS 2 heterostructure in an optical microcavity. The generated quasiparticle with part-plasmon, part-exciton and part-light is analyzed with Hopfield coefficients that are calculated by using three-coupled oscillator model. The resulted plasmon-exciton polaritonic hybrid states can efficiently enlarge the obtained Rabi splitting, which paves the way for the practical applications of polaritonic devices based on ultrathin materials.

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Section: Introductionmentioning

confidence: 99%

Large Rabi splitting obtained in Ag-WS2 strong-coupling heterostructure with optical microcavity at room temperature

Li¹,

Zu²,

Zhang³

et al. 2019

Opto-Electronic Advances

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“…Traditional photonic resonators, such as Fabry-Perot (FP) [11,12] and photonic crystal cavities [13], though having low damping loss, are incapable of compressing mode volumes below the diffraction limit, which restrains the further enhancement of coupling strength. In this context, plasmonic resonators, noble metal nanoparticles allowing the excitation of surface plasmons, can highly confine incident photons into subwavelength volumes, providing ultracompact and robust platforms for the realization of strong coupling at room temperature [14][15][16][17][18]. Recent studies have successfully demosntrated the strong plasmon-exciton coupling in 2D TMDC semiconductors at the single nanoparticle level [19,20], exhibiting great advantages of plasmonic resonators in enhancing coupling strength as compared to traditional cavity systems.…”

mentioning

confidence: 99%

Revealing Strong Plasmon-Exciton Coupling between Nanogap Resonators and Two-Dimensional Semiconductors at Ambient Conditions

et al. 2020

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Strong coupling of two-dimensional semiconductor excitons with plasmonic resonators enables control of light-matter interaction at the subwavelength scale. Here we develop strong coupling in plasmonic nano-gap resonators that allow modification of exciton number contributing to the coupling. Using this system, we not only demonstrate a large vacuum Rabi splitting up to 163 meV and splitting features in photoluminescence spectra, but also reveal that the exciton number can be reduced down to single-digit level (N < 10), which is an order lower than that of traditional systems, close to single-exciton based strong coupling. In addition, we prove that the strong coupling process is not affected by the large exciton coherence size that was previously believed to be detrimental to the formation of plasmon-exciton interaction. Our work provides a deeper understanding of storng coupling in two-dimensional semiconductors, paving the way for room temperature quantum optics applications.Introduction-Two-dimensional (2D) transitional metal dichalcogenides (TMDCs), such as molybdenum disulfide (MoS 2 ) and tungsten disulfide (WS 2 ) have attracted tremendous attention recently [1,2]. These semiconductor nanosheets, when thinned down to monolayers (MLs), become direct bandgap, hosting excitons having ultralarge binding energy[3-5] and very high oscillator strength [2,6], which arise from the strong coulomb interaction and reduced dielectric screening in atomically thin structures. As a result, excitons in TMDC MLs can be tighly bound even at room temperature, producing strong light absorption and photoluminescence (PL). Integrating TMDC MLs with an optical resonator enables fast energy exchange between electromagnetic (EM) resonances and semiconductor excitons, i.e. the strong lightmatter interaction or strong couling, allowing the formation of half-light half-matter quasiparticles, known as polaritons. The strong coupling process not only is of interest for fundamental quantum optics, e.g. Bose-Einstein condensation[7] with superfluid characteritics, but also exhibits a great potential for many compelling applications, e.g. quantum computing [8] and thresholdless semiconductor lasing [9,10].

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“…The polariton dispersion relation in the Tamm structure was measured by angle‐resolved PL spectra and a Rabi splitting of 23.5 meV is resolved (Figure h). In a different study, hybrid Tamm‐plasmon EPs generated due to the strong coupling between excitons in GaAs quantum wells, MoSe 2 monolayer, and cavity photons were observed. Such hybrid PEPs inherit the properties of strongly interacting excitons from both GaAs quantum wells and MoSe 2 , resulting in Bose‐Einstein condensation at an elevated temperature of 4.2 K …”

Section: Far‐field Spectroscopy Studies Of Eps In Tmdsmentioning

confidence: 99%

Recent Progress on Exciton Polaritons in Layered Transition‐Metal Dichalcogenides

Fei

2019

Advanced Optical Materials

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Exciton polaritons (EPs) are half‐light, half‐matter quasiparticles formed due to the coupling between photons and excitons in semiconductors. Their uniqueness lies at the strong light–matter interactions and long‐distance transport, thus promising for many novel applications in photonics, information, and quantum technologies. Recently, EPs in group‐VI transition‐metal dichalcogenides (TMDs) have attracted a lot of research interest due to their room‐temperature stability, long‐distance propagation, and controllability through electric gating, valley‐selective optical pumping, and precise thickness control. In this progress report, recent studies of EPs in TMDs are reviewed, highlighting their key properties and functionalities, and then discussing the potential directions for future research.

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Observation of hybrid Tamm-plasmon exciton- polaritons with GaAs quantum wells and a MoSe2 monolayer

Cited by 43 publications

References 29 publications

Large Rabi splitting obtained in Ag-WS2 strong-coupling heterostructure with optical microcavity at room temperature

Large Rabi splitting obtained in Ag-WS2 strong-coupling heterostructure with optical microcavity at room temperature

Revealing Strong Plasmon-Exciton Coupling between Nanogap Resonators and Two-Dimensional Semiconductors at Ambient Conditions

Recent Progress on Exciton Polaritons in Layered Transition‐Metal Dichalcogenides

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