Mapping near-field environments of plasmonic and 2D materials with photo-induced force imaging (Conference Presentation)

2016 ◽  
Author(s):  
Thejaswi U. Tumkur ◽  
Chloe Doiron ◽  
Xiao Yang ◽  
Bo Li ◽  
Dayne F. Swearer ◽  
...  
Keyword(s):  
2D Materials ◽  
Near Field

scholarly journals Gate voltage and doping effects on near-field radiation heat transfer in plasmonic heterogeneous pairs of graphene and black phosphorene

RSC Advances ◽  
2019 ◽  
Vol 9 (50) ◽  
pp. 29173-29181 ◽  
Author(s):  
Desalegn T. Debu ◽  
M. Hasan Doha ◽  
Hugh O. H. Churchill ◽  
Joseph B. Herzog
Keyword(s):  
2D Materials ◽  
Near Field ◽  
Radiation Heat Transfer ◽  
Plasmon Coupling ◽  
Radiation Heat ◽  
Doping Effects ◽  
Black Phosphorene ◽  
Matter Interaction ◽  
Field Radiation ◽  
Light Matter Interaction

Plasmon coupling and hybridization in 2D materials plays a significant role for controlling light–matter interaction at the nanoscale.

scholarly journals Plasmonic nanocavity enhanced vibration of graphene by a radially polarized optical field

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 2017-2023
Author(s):  
Xuwei Li ◽  
Tingting Zhang ◽  
Zhengkun Fu ◽  
Bowen Kang ◽  
Xiaohu Mi ◽  
...  
Keyword(s):  
2D Materials ◽  
Near Field ◽  
Interlayer Coupling ◽  
Optical Field ◽  
Vibrational Signal ◽  
Polarized Beams ◽  
Plane Vibration ◽  
Out Of Plane ◽  
Potential Applications ◽  
Radially Polarized

AbstractThe combination of 2D materials and surface plasmon can produce some novel optical phenomena that have attracted much attention. Illuminated by light with different polarization states, the field distribution around the plasmonic structure can control the light-matter interaction. The interaction between graphene and light can be strongly enhanced by employing radially polarized beams in a nanocavity. Here, we study the selectively enhanced vibration of graphene in a coupled plasmonic gold nanocavity with a radially polarized optical field, and the coupling and enhancing mechanisms are investigated both experimentally and numerically. By focusing a radially polarized beam, a high z component of a localized near field in the nanocavity is provided to strongly enhance the interaction between graphene and light, which can be used to enhance the vibrational signal of the interlayer. For the in-plane vibration of graphene, a similar enhancement is obtained with a linearly and radially polarized optical field. A plasmonic nanocavity is used to enhance the vibration of graphene, which provides potential applications in studying the out-of-plane vibration mode and exploring the mechanism of the interlayer coupling of 2D materials.

scholarly journals Three-dimensional near-field analysis through peak force scattering-type near-field optical microscopy

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1817-1825 ◽  
Author(s):  
Haomin Wang ◽  
Jiahan Li ◽  
James H. Edgar ◽  
Xiaoji G. Xu
Keyword(s):  
Optical Microscopy ◽  
2D Materials ◽  
Near Field ◽  
Three Dimensional ◽  
Peak Force ◽  
Field Analysis ◽  
Two Dimensional

Peak force scanning near-field optical microscopy (PF-SNOM) is instrumental in exploring tomographic polaritonic behaviors of two-dimensional (2D) materials at the nanoscale.

scholarly journals Control of near-field radiative heat transfer based on anisotropic 2D materials

AIP Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 085321 ◽  
Author(s):  
Lixin Ge ◽  
Yuping Cang ◽  
Ke Gong ◽  
Lihai Zhou ◽  
Daqing Yu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
2D Materials ◽  
Near Field

scholarly journals Nanomechanics of few-layer materials: do individual layers slide upon folding?

2020 ◽  
Author(s):  
Ronaldo J C Batista ◽  
Rafael F Dias ◽  
Ana P M Barboza ◽  
Alan B de Oliveira ◽  
Taise M Manhabosco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
2D Materials ◽  
Near Field ◽  
Outer Part ◽  
Flexural Properties ◽  
Vibrational Properties ◽  
Multilayer Graphene ◽  
Number Of Layers ◽  
Tip Enhanced Raman Spectroscopy

Folds naturally appear on nanometrically thin (also called 2D) materials after exfoliation, eventually creating folded edges across the resulting flakes. In the present work, we investigate the adhesion and flexural properties of single and multilayered 2D materials upon folding. This is accomplished by measuring and modeling mechanical properties of folded edges, which allow the experimental determination of the scaling for the bending stiffness (κ) of a multilayered 2D material with its number of layers (n). In the case of talc, we obtain κ proportional to n3 for n ≥ 5, establishing that there is no interlayer sliding upon folding, at least in this thickness range. Such a result, if applicable to other materials, would imply that layers in folds might be either compressed (at the inner part of the fold) or stretched (at its outer part), leading to changes in their vibrational properties relative to a flat flake. This hypothesis was confirmed by near-field tip-enhanced Raman spectroscopy of a multilayer graphene fold.

Near-field Enhancement and Optimal Performance in Metamaterial Terahertz Modulators Based on 2D-materials

2016 ◽  
Author(s):  
Sara Arezoomandan ◽  
Rusen Yan ◽  
Prashanth Gopalan ◽  
Kun Tian ◽  
Ashish Chanana ◽  
...  
Keyword(s):  
2D Materials ◽  
Near Field ◽  
Field Enhancement ◽  
Optimal Performance

Near-field scanning optical microscopy

1986 ◽  
Vol 44 ◽  
pp. 642-643
Author(s):  
E. Betzig ◽  
A. Harootunian ◽  
M. Isaacson ◽  
A. Lewis
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Visible Radiation ◽  
Field Methods ◽  
Optical Elements ◽  
Optical Region ◽  
Order Of Magnitude ◽  
Nondestructive Imaging ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

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