scholarly journals Lattice Resonances in Transdimensional WS2 Nanoantenna Arrays

2019 ◽  
Vol 9 (10) ◽  
pp. 2005 ◽  
Author(s):  
Viktoriia E. Babicheva ◽  
Jerome V. Moloney
Keyword(s):  
Transition Metal ◽  
Silicon Nanoparticles ◽  
Transition Metal Dichalcogenides ◽  
High Refractive Index ◽  
Periodic Array ◽  
Nanophotonic Devices ◽  
Infrared Spectral ◽  
Long Time ◽  
Metal Dichalcogenides ◽  
Spectral Ranges

Mie resonances in high-refractive-index nanoparticles have been known for a long time but only recently have they became actively explored for control of light in nanostructures, ultra-thin optical components, and metasurfaces. Silicon nanoparticles have been widely studied mainly because of well-established fabrication technology, and other high-index materials remain overlooked. Transition metal dichalcogenides, such as tungsten or molybdenum disulfides and diselenides, are known as van der Waals materials because of the type of force holding material layers together. Transition metal dichalcogenides possess large permittivity values in visible and infrared spectral ranges and, being patterned, can support well-defined Mie resonances. In this Communication, we show that a periodic array of tungsten disulfide (WS2) nanoantennae can be considered to be transdimensional lattice and supports different multipole resonances, which can be controlled by the lattice period. We show that lattice resonances are excited in the proximity to Rayleigh anomaly and have different spectral changes in response to variations of one or another orthogonal period. WS2 nanoantennae, their clusters, oligomers, and periodic array have the potential to be used in future nanophotonic devices with efficient light control at the nanoscale.

scholarly journals Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics

2020 ◽  
Author(s):  
Georgy Ermolaev ◽  
D. Grudinin ◽  
Y. Stebunov ◽  
K. Voronin ◽  
Vasyl Kravets ◽  
...  
Keyword(s):  
Transition Metal ◽  
Optical Anisotropy ◽  
Near Infrared ◽  
Near Field ◽  
Transition Metal Dichalcogenides ◽  
Next Generation ◽  
Infrared Wavelength ◽  
Infrared Spectral ◽  
Metal Dichalcogenides ◽  
On Chip

Abstract Large optical anisotropy observed in a broad spectral range is of paramount importance for efficient light manipulation in countless devices. Although a giant anisotropy was recently observed in the mid-infrared wavelength range, for visible and near-infrared spectral intervals, the problem remains acute with the highest reported birefringence values of 0.8 in BaTiS3 and h-BN crystals. This inspired an intensive search for giant optical anisotropy among natural and artificial materials. Here, we demonstrate that layered transition metal dichalcogenides (TMDCs) provide an answer to this quest owing to their fundamental differences between intralayer strong covalent bonding and weak interlayer van der Walls interaction. To do this, we carried out a correlative far- and near-field characterization validated by first-principle calculations that reveals an unprecedented birefringence of 1.5 in the infrared and 3 in the visible light for MoS2. Our findings demonstrate that this outstanding anisotropy allows for tackling the diffraction limit enabling an avenue for on-chip next-generation photonics.

scholarly journals Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
G. A. Ermolaev ◽  
D. V. Grudinin ◽  
Y. V. Stebunov ◽  
K. V. Voronin ◽  
V. G. Kravets ◽  
...  
Keyword(s):  
Transition Metal ◽  
Optical Anisotropy ◽  
Near Infrared ◽  
Near Field ◽  
Transition Metal Dichalcogenides ◽  
Next Generation ◽  
Infrared Wavelength ◽  
Infrared Spectral ◽  
Metal Dichalcogenides ◽  
On Chip

AbstractLarge optical anisotropy observed in a broad spectral range is of paramount importance for efficient light manipulation in countless devices. Although a giant anisotropy has been recently observed in the mid-infrared wavelength range, for visible and near-infrared spectral intervals, the problem remains acute with the highest reported birefringence values of 0.8 in BaTiS3 and h-BN crystals. This issue inspired an intensive search for giant optical anisotropy among natural and artificial materials. Here, we demonstrate that layered transition metal dichalcogenides (TMDCs) provide an answer to this quest owing to their fundamental differences between intralayer strong covalent bonding and weak interlayer van der Waals interaction. To do this, we made correlative far- and near-field characterizations validated by first-principle calculations that reveal a huge birefringence of 1.5 in the infrared and 3 in the visible light for MoS2. Our findings demonstrate that this remarkable anisotropy allows for tackling the diffraction limit enabling an avenue for on-chip next-generation photonics.

scholarly journals Mechanical scanning probe lithography of nanophotonic devices based on multilayer TMDCs

2021 ◽  
Vol 2015 (1) ◽  
pp. 012020
Author(s):  
B R Borodin ◽  
F A Benimetskiy ◽  
V Yu Davydov ◽  
I A Eliseyev ◽  
S I Lepeshov ◽  
...  
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
High Precision ◽  
Transition Metal Dichalcogenides ◽  
Scanning Probe ◽  
Scanning Probe Lithography ◽  
Long Wavelength ◽  
Nanophotonic Devices ◽  
Metal Dichalcogenides ◽  
Mechanical Scanning

Abstract In this work, we demonstrate the possibility of using mechanical Scanning probe lithography (m-SPL) for fabricating nanophotonic devices based on multilayered transition metal dichalcogenides (TMDCs). By m-SPM, we created a nanophotonic resonator from a 70-nm thick MoSe2 flake transferred on Si/Au substrate. The optical properties of the created structure were investigated by measuring microphotoluminescence. The resonator exhibits four resonance PL peaks shifted in the long-wavelength area from the flake PL peak. Thus, here we demonstrate that m-SPL is a high-precision lithography method suitable for creating nanophotonic devices based on multilayered TMDCs.

Transition Metal Dichalcogenide Nanoantennas Lattice

MRS Advances ◽  
2019 ◽  
Vol 4 (41-42) ◽  
pp. 2283-2288 ◽  
Author(s):  
Viktoriia E. Babicheva
Keyword(s):  
Refractive Index ◽  
Transition Metal ◽  
Near Infrared ◽  
Building Blocks ◽  
High Refractive Index ◽  
Photonic Devices ◽  
Transition Metal Dichalcogenide ◽  
Optical Resonances ◽  
Infrared Spectral ◽  
Spectral Ranges

ABSTRACTHigh-index materials such as silicon and III-V compounds have recently gained a lot of interest as a promising material platform for efficient photonic nanostructures. Because of the high refractive index, nanoparticles of such materials support Mie resonances and enable efficient light control and its confinement at the nanoscale. Here we propose a design of nanostructure with multipole resonances where optical nanoantennas are made out of transition metal dichalcogenide, in particular, tungsten disulfide WS2. Transition metal dichalcogenide (TMDCs) possess a high refractive index and strong optical anisotropy because of their layered structure and are promising building blocks for next-generation photonic devices. Strong anisotropic response results in different components of TMDC permittivity and the possibility of tailoring nanostructure optical properties by choosing different axes and adjusting dimensions in design. The proposed periodic array of TMDC nanoantennas can be used for controlling optical resonances in the visible and near-infrared spectral ranges and engineering efficient ultra-thin optical components with nanoscale light confinement.

scholarly journals Super-resolved Optical Mapping of Reactive Sulfur-Vacancies in Two-Dimensional Transition Metal Dichalcogenides

ACS Nano ◽  
2021 ◽  
Author(s):  
Miao Zhang ◽  
Martina Lihter ◽  
Tzu-Heng Chen ◽  
Michal Macha ◽  
Archith Rayabharam ◽  
...  
Keyword(s):  
Transition Metal ◽  
Optical Mapping ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Metal Dichalcogenides

Highly electroconductive and uniform WS2 film growth by sulfurization of W film using diethyl sulfide

2021 ◽  
Author(s):  
Yoobeen Lee ◽  
Jin Won Jung ◽  
Jin Seok Lee
Keyword(s):  
Transition Metal ◽  
Grain Boundaries ◽  
High Performance ◽  
Film Growth ◽  
Transition Metal Dichalcogenides ◽  
Electronic Systems ◽  
Intrinsic Defects ◽  
Diethyl Sulfide ◽  
Metal Dichalcogenides

The reduction of intrinsic defects, including vacancies and grain boundaries, remains one of the greatest challenges to produce high-performance transition metal dichalcogenides (TMDCs) electronic systems. A deeper comprehension of the...

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