Unidirectional Doubly Enhanced MoS<sub>2</sub> Emission via Photonic Fano Resonances

Zhang, Xingwang; Choi, Seungkyu; Wang, Dake; Naylor, Carl H.; Johnson, A. T. Charlie; Cubukcu, Ertugrul

doi:10.1021/acs.nanolett.7b02777

Cited by 77 publications

(85 citation statements)

References 34 publications

(51 reference statements)

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“…In summary, suspending 2D-TMDs to enhance their intrinsic quantum yield while simultaneously redirecting their emission for low-NA collection can be a viable route for the construction of 2D-TMDs-based photonic devices. Their efficiency can further be improved by resonantly enhancing the absorption and emission processes of 2D-TMDs as was demonstrated by Zhang and coworkers [83] using photonic crystal slab geometries.…”

Section: Shaping Directional Emissionmentioning

confidence: 90%

Integration of two-dimensional transition metal dichalcogenides with Mie-resonant dielectric nanostructures

Mupparapu

Bucher

Staude

2020

Advances in Physics: X

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Integrating transition metal dichalcogenide (TMD) monolayers with dielectric nanostructures exhibiting Mie-like resonances opens a plethora of opportunities in manipulating their excitonic emission in the near-field and far-field regimes, yielding interactions spanning from weak to strong coupling regimes, and routing valley polarized chiral emission, to name just a few. Moreover, there is a completely new path unraveled recently by realizing dielectric resonators directly from TMDs, thus combining scatterer and emitter into a single entity. This hybrid configuration is promising to realize integrated active meta-optical devices in a facile manner. In this review article, we provide an overview of the state of the art on integrating monolayers of TMDs with Mieresonant photonic nanostructures. ARTICLE HISTORY

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Section: Shaping Directional Emissionmentioning

confidence: 90%

Integration of two-dimensional transition metal dichalcogenides with Mie-resonant dielectric nanostructures

Mupparapu

Bucher

Staude

2020

Advances in Physics: X

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“…Exploring these hybrid platforms for different functionalities and applications is a blooming direction in the field. Examples are emission enhancement [72,73], spatial modulation of the properties of a 2D material [74], integrated photonics [75] as well as biosensing [76], photodetectors [77], and photoelectrochemical water-splitting [78].…”

Section: D/quasi-2d Materials Integrated With Mesophotonic Platformsmentioning

confidence: 99%

Feature issue introduction: Beyond Thin Films: Photonics with Ultrathin and Atomically Thin Materials

Foteinopoulou

Panoiu

Shalaev

et al. 2019

Opt. Mater. Express

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Rapid advances in nanotechnology have brought about the realization of material films that may comprise only as little as a few atomic layers. For example, semiconductors and metals of sub-10 nm thicknesses have been realized. Then, the graphene paradigm inspired a plethora of other 2D and quasi-2D materials. In this new era, materials have transcended beyond the traditional thin films to a domain of atomic-scale thicknesses, unleashing vast and unexplored possibilities for light-matter interactions. This Optical Materials Express virtual issue features a collection of thirty-five papers aiming to capture the current state-of-the art, trends and open research directions in photonics with ultrathin and atomically thin materials.

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“…[ 30 ] Thus, the coupling between individual bright excitons and plasmons (P) can offer unexpected properties depending upon their coupling strength. In general, surface‐enhanced phenomena like Purcell effect, Fano resonances are dominant in the weak to intermediate‐coupling regime, [ 31,32 ] whereas the strong‐coupling with discrete bright exciton and plasmon can lead to the formation of individual bright plexcitons (X 0 A ‐P and X 0 B ‐P) in size‐tunable metal‐TMDs hybrid nanostructures, [ 11,33,34 ] hitherto unexplored.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Investigation of Individual Bright Exciton–Plasmon Polaritons in Size‐Tunable Metal–WS₂ Hybrid Nanostructures

Chowdhury

Datta

Bhaktha

et al. 2020

Advanced Optical Materials

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metal dichalcogenides (TMDs). [17][18][19][20][21][22][23][24][25][26][27] Indeed, the superior coupling between optical field and surface plasmons makes the metal nanostructures appealing for strong light-matter interactions. [28,29] On the other hand, excitons in TMDs (MoS 2 , WS 2 ) are potentially attractive due to their massive exciton binding energy (≈0.5 eV) and spin-valley-coupled photon energy selectiveness resulting in alike but independent bright excitons (X 0 A and X 0 B ) in the same system. [30] Thus, the coupling between individual bright excitons and plasmons (P) can offer unexpected properties depending upon their coupling strength. In general, surface-enhanced phenomena like Purcell effect, Fano resonances are dominant in the weak to intermediate-coupling regime, [31,32] whereas the strong-coupling with discrete bright exciton and plasmon can lead to the formation of individual bright plexcitons (X 0 A -P and X 0 B -P) in size-tunable metal-TMDs hybrid nanostructures, [11,33,34] hitherto unexplored.Interestingly, excitons in monolayer TMDs are highly confined along in-plane directions, whereas metal nanostructures usually trap the optical field in perpendicular to the layer planes. [35] This misalignment of effective dipole-dipole interactions lead to poor coupling between X 0 and P. Therefore, the strong coupling can only be achieved, if more dipoles in TMDs are oriented along out-of-plane direction. A few-layer TMDs is a possible pathway instead of a monolayer to achieve stronger coupling, as proposed by Kleemann et al., [35] which eventually leads to the generation of plexcitons. In general, plexcitons are tracked down by observing the anticrossing behavior of polariton dispersion curves and formation of two energetically well-separated hybridized peaks governed by Rabi-splitting, a measure of coupling strength. [36] Indeed, several reports show that plexcitonic states can be achieved by the fine tuning of absorption cross-section and spectral linewidth of plasmons and excitons, via linear and angle-resolved spectroscopy techniques using relatively higher optical pumping and near-field microscopic techniques. [9,10,37,38] Alternatively, the ongoing quest is to study strong exciton-plasmon coupling via transient pump-probe spectroscopy technique and to study the time evolution of plexcitons. [11,33,34] Here, individual ultrafast detection of both the bright exciton-plasmon polaritons (X 0 A -P and X 0 B -P) is reported by Strong light-matter interactions between resonantly coupled metal plasmons and spin-orbit-coupled bright excitons from 2D transition metal dichalcogenides (TMDs) can produce discrete bright exciton-plasmon polaritons (plexcitons). A few efforts have been made to perceive the spin-induced exciton-polaritons in nanocavities at cryogenic conditions, however, successful realization of bright plexcitons in time domain is still lacking. Here, both the bright plexcitons are identified discretely at room temperature and their ultrafast temporal dynamics in size-tunable Au-WS 2 hybrid...

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Unidirectional Doubly Enhanced MoS₂ Emission via Photonic Fano Resonances

Cited by 77 publications

References 34 publications

Integration of two-dimensional transition metal dichalcogenides with Mie-resonant dielectric nanostructures

Integration of two-dimensional transition metal dichalcogenides with Mie-resonant dielectric nanostructures

Feature issue introduction: Beyond Thin Films: Photonics with Ultrathin and Atomically Thin Materials

Ultrafast Investigation of Individual Bright Exciton–Plasmon Polaritons in Size‐Tunable Metal–WS₂ Hybrid Nanostructures

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Unidirectional Doubly Enhanced MoS2 Emission via Photonic Fano Resonances

Cited by 77 publications

References 34 publications

Integration of two-dimensional transition metal dichalcogenides with Mie-resonant dielectric nanostructures

Integration of two-dimensional transition metal dichalcogenides with Mie-resonant dielectric nanostructures

Feature issue introduction: Beyond Thin Films: Photonics with Ultrathin and Atomically Thin Materials

Ultrafast Investigation of Individual Bright Exciton–Plasmon Polaritons in Size‐Tunable Metal–WS2 Hybrid Nanostructures

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Unidirectional Doubly Enhanced MoS₂ Emission via Photonic Fano Resonances

Ultrafast Investigation of Individual Bright Exciton–Plasmon Polaritons in Size‐Tunable Metal–WS₂ Hybrid Nanostructures