Enhanced excitation and emission from 2D transition metal dichalcogenides with all-dielectric nanoantennas

Lepeshov, Sergey; Krasnok, Alex; Alù, Andrea

doi:10.1088/1361-6528/ab0daf

Cited by 22 publications

(18 citation statements)

References 48 publications

(79 reference statements)

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“…Under continuous wave (CW) excitation in the steady-state regime, the Purcell factor is equal to the enhancement of total power emitted by an exciton, which is either radiated out to the far-field ( ) or dissipated ( ) in the resonator's material, , with being the radiation power is essential as it enables enhancement of the quantum yield of exciton emission 151,[193][194][195][196][197][198][199] reaching ~65% 195 , enhanced single-photon emission 195 , brightening up dark excitons 148,195,200 , exciton light emission tailoring and shaping [145][146][147]201 , and low-threshold lasing 202,203 .…”

Section: Resonators For Light-matter Interactionmentioning

confidence: 99%

Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides

et al. 2022

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Two dimensional (2D) transition metal dichalcogenide (TMDC) materials, such as MoS2, WS2, MoSe2, and WSe2, have received extensive attention in the past decade due to their extraordinary electronic, optical and thermal properties. They evolve from indirect bandgap semiconductors to direct bandgap semiconductors while their layer number is reduced from few layers to a monolayer limit. Consequently, there is strong photoluminescence in a monolayer (1L) TMDC due to the large quantum yield. Moreover, such monolayer semiconductors have two other exciting properties: large binding energy of excitons and valley polarization. These properties make them become ideal materials for various electronic, photonic and optoelectronic devices. However, their performance is limited by the relatively weak light-matter interactions due to their atomically thin form factor. Resonant nanophotonic structures provide a viable way to address this issue and enhance light-matter interactions in 2D TMDCs. Here, we provide an overview of this research area, showcasing relevant applications, including exotic light emission, absorption and scattering features. We start by overviewing the concept of excitons in 1L-TMDC and the fundamental theory of cavity-enhanced emission, followed by a discussion on the recent progress of enhanced light emission, strong coupling and valleytronics. The atomically thin nature of 1L-TMDC enables a broad range of ways to tune its electric and optical properties. Thus, we continue by reviewing advances in TMDC-based tunable photonic devices. Next, we survey the recent progress in enhanced light absorption over narrow and broad bandwidths using 1L or few-layer TMDCs, and their applications for photovoltaics and photodetectors. We also review recent efforts of engineering light scattering, e.g., inducing Fano resonances, wavefront engineering in 1L or few-layer TMDCs by either integrating resonant structures, such as plasmonic/Mie resonant metasurfaces, or directly patterning monolayer/few layers TMDCs. We then overview the intriguing physical properties of different types of van der Waals heterostructures, and their applications in optoelectronic and photonic devices. Finally, we draw our opinion on potential opportunities and challenges in this rapidly developing field of research.

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Section: Resonators For Light-matter Interactionmentioning

confidence: 99%

Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides

et al. 2022

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“…DNs offer many opportunities for coupling to nanoscale emitters including 2D-TMDs [1,89,90]. In ref [91], Lepeshov and coworkers numerically investigated an arrangement of silicon nanoparticles (Si-NPs) on a glass substrate (see Figure 5(a)). A 1L-TMD was considered to be situated in between a Si-NP and the substrate.…”

Section: Emission Enhancement and Coupling Phenomenamentioning

confidence: 99%

“…e) Experimental photoluminescence spectra from bare few layered WS 2 ( > 10 layers) and assemblies of silicon nanoparticles of different radii on few layered WS 2 (10 layers). (a-c) Reproduced with permission from[91], Ó IOP Publishing. All rights reserved.…”

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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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“…Smart geometries, such attenuated total internal reflection setups [225] and integration with cavities [226][227][228] has been pursued to access strong light-matter coupling physics [229][230][231]. Plasmonic [232][233][234][235][236][237] and Mie-resonant [238][239][240] antennas as well as metasurfaces [241,242] can also naturally be integrated with 2D materials of the same dimensionality to enhance light-matter interactions without notably altering the properties of the 2D materials. This has been successfully pursued to enhance light absorption, scattering, and emission phenomena [234], whereas conventional metasurfaces can help improve the performance and add functionality to 2D materials, and the reverse has also proven to be extremely valuable.…”

Section: The Imminent Fusion Of 2d Metasurface Optics and 2d Vdw Metamentioning

confidence: 99%

The road to atomically thin metasurface optics

Brongersma

2020

Nanophotonics

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The development of flat optics has taken the world by storm. The initial mission was to try and replace conventional optical elements by thinner, lightweight equivalents. However, while developing this technology and learning about its strengths and limitations, researchers have identified a myriad of exciting new opportunities. It is therefore a great moment to explore where flat optics can really make a difference and what materials and building blocks are needed to make further progress. Building on its strengths, flat optics is bound to impact computational imaging, active wavefront manipulation, ultrafast spatiotemporal control of light, quantum communications, thermal emission management, novel display technologies, and sensing. In parallel with the development of flat optics, we have witnessed an incredible progress in the large-area synthesis and physical understanding of atomically thin, two-dimensional (2D) quantum materials. Given that these materials bring a wealth of unique physical properties and feature the same dimensionality as planar optical elements, they appear to have exactly what it takes to develop the next generation of high-performance flat optics.

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Enhanced excitation and emission from 2D transition metal dichalcogenides with all-dielectric nanoantennas

Cited by 22 publications

References 48 publications

Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides

Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides

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

The road to atomically thin metasurface optics

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