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 Integrated Optical Phased Arrays for Beam Forming and Steering

2021 ◽  
Vol 11 (9) ◽  
pp. 4017
Author(s):  
Yongjun Guo ◽  
Yuhao Guo ◽  
Chunshu Li ◽  
Hao Zhang ◽  
Xiaoyan Zhou ◽  
...  
Keyword(s):  
Near Infrared ◽  
Phased Arrays ◽  
Mechanical Stability ◽  
Building Blocks ◽  
High Yield ◽  
Beam Forming ◽  
Integrated Optical ◽  
Optical Phased Arrays ◽  
Infrared Spectral ◽  
Spectral Ranges

Integrated optical phased arrays can be used for beam shaping and steering with a small footprint, lightweight, high mechanical stability, low price, and high-yield, benefiting from the mature CMOS-compatible fabrication. This paper reviews the development of integrated optical phased arrays in recent years. The principles, building blocks, and configurations of integrated optical phased arrays for beam forming and steering are presented. Various material platforms can be used to build integrated optical phased arrays, e.g., silicon photonics platforms, III/V platforms, and III–V/silicon hybrid platforms. Integrated optical phased arrays can be implemented in the visible, near-infrared, and mid-infrared spectral ranges. The main performance parameters, such as field of view, beamwidth, sidelobe suppression, modulation speed, power consumption, scalability, and so on, are discussed in detail. Some of the typical applications of integrated optical phased arrays, such as free-space communication, light detection and ranging, imaging, and biological sensing, are shown, with future perspectives provided at the end.

scholarly journals Very High Refractive Index Transition Metal Dichalcogenide Photonic Conformal Coatings by Conversion of ALD Metal Oxides

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Christopher T. Chen ◽  
Jacopo Pedrini ◽  
E. Ashley Gaulding ◽  
Christoph Kastl ◽  
Giuseppe Calafiore ◽  
...  
Keyword(s):  
Refractive Index ◽  
Transition Metal ◽  
Metal Oxides ◽  
High Refractive Index ◽  
Transition Metal Dichalcogenide ◽  
Conformal Coatings ◽  
Very High

scholarly journals The Quest for Low Loss High Refractive Index Dielectric Materials for UV Photonic Applications

2018 ◽  
Vol 8 (11) ◽  
pp. 2065 ◽  
Author(s):  
Yael Gutiérrez ◽  
Dolores Ortiz ◽  
José Saiz ◽  
Francisco González ◽  
Pablo Albella ◽  
...  
Keyword(s):  
Refractive Index ◽  
Near Infrared ◽  
Numerical Study ◽  
Near Field ◽  
Field Enhancement ◽  
Dielectric Materials ◽  
High Refractive Index ◽  
Heat Radiation ◽  
Aluminum Phosphide ◽  
Spectral Ranges

Nanostructured High Refractive Index (HRI) dielectric materials, when acting as nanoantennas or metasurfaces in the near-infrared (NIR) and visible (VIS) spectral ranges, can interact with light and show interesting scattering directionality properties. Also, HRI dielectric materials with low absorption in these spectral ranges show very low heat radiation when illuminated. Up to now, most of the studies of these kind of materials have been explored in the VIS-NIR. However, to the best of our knowledge, these properties have not been extended to the ultraviolet (UV), where their application in fields like photocatalysis, biosensing, surface-enhanced spectroscopies or light guiding and trapping can be of extraordinary relevance. Here, we present a detailed numerical study of the directional scattering properties, near-field enhancement and heat generation of several materials that can be good candidates for those applications in the UV. These materials include aluminum phosphide, aluminum arsenide, aluminum nitride, diamond, cerium dioxide and titanium dioxide. In this study, we compare their performance when forming either isolated nanoparticles or dimers to build either nanoantennas or unit cells for more complex metasurfaces.

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 Tunable unidirectional nonlinear emission from transition-metal-dichalcogenide metasurfaces

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mudassar Nauman ◽  
Jingshi Yan ◽  
Domenico de Ceglia ◽  
Mohsen Rahmani ◽  
Khosro Zangeneh Kamali ◽  
...  
Keyword(s):  
Refractive Index ◽  
Transition Metal ◽  
Second Harmonic ◽  
Nonlinear Crystal ◽  
High Refractive Index ◽  
Great Promise ◽  
Fundamental Wave ◽  
Light Sources ◽  
Transition Metal Dichalcogenide ◽  
Single Beam

AbstractNonlinear light sources are central to a myriad of applications, driving a quest for their miniaturisation down to the nanoscale. In this quest, nonlinear metasurfaces hold a great promise, as they enhance nonlinear effects through their resonant photonic environment and high refractive index, such as in high-index dielectric metasurfaces. However, despite the sub-diffractive operation of dielectric metasurfaces at the fundamental wave, this condition is not fulfilled for the nonlinearly generated harmonic waves, thereby all nonlinear metasurfaces to date emit multiple diffractive beams. Here, we demonstrate the enhanced single-beam second- and third-harmonic generation in a metasurface of crystalline transition-metal-dichalcogenide material, offering the highest refractive index. We show that the interplay between the resonances of the metasurface allows for tuning of the unidirectional second-harmonic radiation in forward or backward direction, not possible in any bulk nonlinear crystal. Our results open new opportunities for metasurface-based nonlinear light-sources, including nonlinear mirrors and entangled-photon generation.

scholarly journals Giant Gating Tunability of Optical Refractive Index in Transition Metal Dichalcogenide Monolayers

Nano Letters ◽  
2017 ◽  
Vol 17 (6) ◽  
pp. 3613-3618 ◽  
Author(s):  
Yiling Yu ◽  
Yifei Yu ◽  
Lujun Huang ◽  
Haowei Peng ◽  
Liwei Xiong ◽  
...  
Keyword(s):  
Refractive Index ◽  
Transition Metal ◽  
Transition Metal Dichalcogenide

Three-dimensional silicon-based nanostructures in opal matrix: Preparation and properties

2000 ◽  
Vol 638 ◽  
Author(s):  
A.B. Pevtsov ◽  
V.G. Golubev ◽  
V.A. Kosobukin ◽  
D.A. Kurdyukov ◽  
A.V. Medvedev
Keyword(s):  
Near Infrared ◽  
Photonic Band Gap ◽  
Three Dimensional ◽  
Opal Matrix ◽  
Variable Extent ◽  
Infrared Spectral ◽  
Spectral Ranges ◽  
Silicon Based ◽  
Photonic Band ◽  
Matrix Preparation

AbstractThree-dimensional opal-silicon composites with both direct (a variable extent of filling of opal voids with silicon) and inverted structures have been synthesized. A structural analysis of these fabricated systems is performed. Reflectance spectra from the (111) surface of the composites are measured within the spectral range 400-900 nm. Observed spectral features are interpreted as a manifestation of the [111] direction photonic band gap that is tunable in position and width in the visible and near-infrared spectral ranges.

Sign in / Sign up

Export Citation Format

Share Document