Linearly Polarized Excitons in Single- and Few-Layer ReS<sub>2</sub> Crystals

Aslan, Özgür Burak; Chenet, Daniel; Zande, Arend M. van der; Hone, James; Heinz, Tony F.

doi:10.1021/acsphotonics.5b00486

Cited by 240 publications

(356 citation statements)

References 39 publications

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“…This possibility requires further exploration, both experimentally and theoretically, but it may point to the presence of rather strongly bound excitons even in bulk ReS 2 . This would seem broadly consistent with the observed pronounced excitonic features in optical spectra [5,42].…”

Section: Resultssupporting

confidence: 89%

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Narrow-band anisotropic electronic structure of ReS2

et al. 2017

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We have used angle-resolved photoemission spectroscopy to investigate the band structure of ReS 2 , a transitionmetal dichalcogenide semiconductor with a distorted 1T crystal structure. We find a large number of narrow valence bands, which we attribute to the combined influence of structural distortion and spin-orbit coupling. We further show how this leads to a strong in-plane anisotropy of the electronic structure, with quasi-one-dimensional bands reflecting predominant hopping along zigzag Re chains. We find that this does not persist up to the top of the valence band, where a more three-dimensional character is recovered with the fundamental band gap located away from the Brillouin zone center along k z . These experiments are in good agreement with our density-functional theory calculations, shedding light on the bulk electronic structure of ReS 2 , and how it can be expected to evolve when thinned to a single layer.

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Section: Resultssupporting

confidence: 89%

“…The nature of the optical band gap in ReS 2 has proved controversial, with an indirect band gap suggested by recent optical measurements [42]. To investigate this in more detail, we have performed This is located only 28 meV higher in energy than the calculated valence-band eigenstates at the Z point.…”

Section: Resultsmentioning

confidence: 96%

Narrow-band anisotropic electronic structure of ReS2

et al. 2017

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“…In contrast ReS2 has reduced crystal symmetry which gives rise to anisotropic inplane optical properties. [21,51,[70][71][72] Research related to the electron-electron and hole-hole interactions in the excited state concluded that the anisotropic optical absorption on ReS2 was due to strongly bound excitons. The triclinic crystal structure of ReS2 leads to polarization dependent optical absorption.…”

Section: Excitonic and Absorption Propertiesmentioning

confidence: 99%

Advent of 2D Rhenium Disulfide (ReS₂): Fundamentals to Applications

Rahman

Davey

Qiao

2017

Adv Funct Materials

339

279

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Rhenium disulfide (ReS2) is a two dimensional (2D) group VII transition metal dichalcogenide (TMD). It is attributed with structural and vibrational anisotropy, layer independent electrical and optical properties, and metal-free magnetism properties. These properties are unusual compared with more widely used group VI-TMDs e.g. MoS2, MoSe2, WS2 and WSe2. Consequently, it has attracted significant interest in recent years and is now being used for a variety of applications including solid state electronics, catalysis, and, energy harvesting and energy storage. It is anticipated that ReS2 has the potential to be equally used in parallel with isotropic TMDs from group VI for all known applications and beyond.Therefore, a review on ReS2 is very timely. In this first review on ReS2, we critically analyze the available synthesis procedures and their pros-cons, atomic structure and lattice symmetry, crystal structure and growth mechanisms with an insight to the orientation and architecture of domain and grain boundaries, decoupling of structural and vibrational properties, anisotropic electrical, optical and magnetic properties impacted by crystal imperfections, doping and adatoms adsorptions, and the contemporary applications in different areas.

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“…However, there exist a small number of materials with strong in-plane structural anisotropy. Some examples of these materials are black phosphorus, 7,13,14 group-V TMDCs (ReS 2 and ReSe 2 ), 11,12 and transition metal trichalcogenides (MX 3 ). [15][16][17][18][19] These materials differ from isotropic layered materials in that each individual layer consists of a superlattice of 1D chains extending along one particular lattice direction.…”

Section: Introductionmentioning

confidence: 99%

“…7,13,14,21 More recently, the Raman/PL spectrum, and polarized photodetector applications have been investigated in ReS 2 and black phosphorus. 11,12,[22][23][24]42 Despite these pioneering studies, our understanding of pseudo-1D materials, particularly TMTCs with the chemical formula MX 3 (M = Zr, Ti, Hf and X = S, Se, and Te), is still in its infancy. TMTCs are a new class of layered materials with strong in-plane anisotropy.…”

Section: Introductionmentioning

confidence: 99%

Strong dichroic emission in the pseudo one dimensional material ZrS₃

et al. 2016

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a Zirconium trisulphide (ZrS 3 ), a member of the layered transition metal trichalcogenides (TMTCs) family, has been studied by angle-resolved photoluminescence spectroscopy (ARPLS). The synthesized ZrS 3 layers possess a pseudo one-dimensional nature where each layer consists of ZrS 3 chains extending along the b-lattice direction. Our results show that the optical properties of few-layered ZrS 3 are highly anisotropic as evidenced by large PL intensity variation with the polarization direction. Light is efficiently absorbed when the E-field is polarized along the chain (b-axis), but the field is greatly attenuated and absorption is reduced when it is polarized vertical to the 1D-like chains as the wavelength of the exciting light is much longer than the width of each 1D chain. The observed PL variation with polarization is similar to that of conventional 1D materials, i.e., nanowires, and nanotubes, except for the fact that here the 1D chains interact with each other giving rise to a unique linear dichroism response that falls between the 2D ( planar) and 1D (chain) limit. These results not only mark the very first demonstration of PL polarization anisotropy in 2D systems, but also provide novel insight into how the interaction between adjacent 1D-like chains and the 2D nature of each layer influences the overall optical anisotropy of pseudo-1D materials. Results are anticipated to have an impact on optical technologies such as polarized detectors, near-field imaging, communication systems, and bio-applications relying on the generation and detection of polarized light.

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Linearly Polarized Excitons in Single- and Few-Layer ReS₂ Crystals

Cited by 240 publications

References 39 publications

Narrow-band anisotropic electronic structure of ReS2

Narrow-band anisotropic electronic structure of ReS2

Advent of 2D Rhenium Disulfide (ReS₂): Fundamentals to Applications

Strong dichroic emission in the pseudo one dimensional material ZrS₃

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Linearly Polarized Excitons in Single- and Few-Layer ReS2 Crystals

Cited by 240 publications

References 39 publications

Narrow-band anisotropic electronic structure of ReS2

Narrow-band anisotropic electronic structure of ReS2

Advent of 2D Rhenium Disulfide (ReS2): Fundamentals to Applications

Strong dichroic emission in the pseudo one dimensional material ZrS3

Contact Info

Product

Resources

About

Linearly Polarized Excitons in Single- and Few-Layer ReS₂ Crystals

Advent of 2D Rhenium Disulfide (ReS₂): Fundamentals to Applications

Strong dichroic emission in the pseudo one dimensional material ZrS₃