Gap Size-Dependent Plasmonic Enhancement in Electroluminescent Tunnel Junctions

ACS Photonics ◽  
2022 ◽  
Author(s):  
Angela L. Paoletta ◽  
E-Dean Fung ◽  
Latha Venkataraman
Keyword(s):  
Tunnel Junctions ◽  
Gap Size ◽  
Plasmonic Enhancement ◽  
Size Dependent

scholarly journals Gap size dependent transition from direct tunneling to field emission in single molecule junctions

2011 ◽  
Vol 47 (16) ◽  
pp. 4760 ◽  
Author(s):  
Dong Xiang ◽  
Yi Zhang ◽  
Feliks Pyatkov ◽  
Andreas Offenhäusser ◽  
Dirk Mayer
Keyword(s):  
Field Emission ◽  
Single Molecule ◽  
Gap Size ◽  
Size Dependent ◽  
Direct Tunneling ◽  
Single Molecule Junctions

Dynamic and Magnetotransport Properties of Perpendicularly Magnetized CoFeB Magnetic Tunnel Junctions

SPIN ◽  
2016 ◽  
Vol 06 (04) ◽  
pp. 1640010 ◽  
Author(s):  
S.-M. Chérif ◽  
Y. Roussigné ◽  
M. Belmeguenai ◽  
C.R. Chang ◽  
Y.C. Lee ◽  
...  
Keyword(s):  
Dipolar Coupling ◽  
Tunnel Junctions ◽  
Dynamic Properties ◽  
Magnetic Tunnel Junctions ◽  
Anisotropy Field ◽  
Perpendicular Anisotropy ◽  
Double Barrier ◽  
Magnetic Parameters ◽  
Size Dependent ◽  
Light Scattering Spectroscopy

We present the study of the dynamic properties of CoFeB (CFB) based magnetic tunnel junctions (MTJ) by Brillouin light scattering spectroscopy and micro-strip ferromagnetic resonance technique as well as magnetoresistance measurements. Two different MTJs: single and double barrier systems have been investigated. The dynamic studies revealed mostly similar perpendicular anisotropy field for both CoFeB layers for the single barrier MTJ with the thickest CFB layers, while two sensibly different perpendicular anisotropy fields were revealed in the case of the double barrier MTJ with the thickest CFB soft and hard layers. Modeling the spin wave frequencies behavior allows us the analysis of the experimental data and the derivation of the pertinent magnetic parameters. Our results suggest an interfacial origin of the anisotropy. Therefore, by changing the thickness of the perpendicularly magnetized CFB layers, it is possible to obtain a free and pinned layer usually ensured by the use of synthetic antiferromagnetic material. The tunnel magnetoresistance has been measured in elliptical elements of double barrier MTJ of different sizes. Strong size-dependent switching fields and antiparallel state being more unstable in the smallest device are observed. Patterning effect, lowering the anisotropies around the edge areas and increasing the dipolar coupling that favors the parallel state in the case of stacked layers, are probably the origin.

Exponential size-dependent tunability of strain on the transport behavior in ZnO tunnel junctions: an ab initio study

2015 ◽  
Vol 17 (38) ◽  
pp. 25583-25592 ◽  
Author(s):  
Jia Zhu ◽  
W. J. Chen ◽  
G. H. Zhang ◽  
Yue Zheng
Keyword(s):  
Ab Initio ◽  
Tunnel Junction ◽  
Tunnel Junctions ◽  
Ab Initio Study ◽  
Interesting Issue ◽  
Size Dependent ◽  
Transport Behavior ◽  
Mechanical Sensors ◽  
Exponential Size ◽  
External Strain

It is an interesting issue if the transport behavior of a piezoelectric tunnel junction is sensitive to external strain or stress, and it implies a prospect for developing novel mechanical sensors, transducers, piezotronic devices, etc.

A single bottom facet outperforms random multifacets in a nanoparticle-on-metallic-mirror system

Nanoscale ◽  
2020 ◽  
Vol 12 (44) ◽  
pp. 22452-22461
Author(s):  
Vasanthan Devaraj ◽  
Jong-Min Lee ◽  
Samir Adhikari ◽  
Minjun Kim ◽  
Donghan Lee ◽  
...  
Keyword(s):  
Mirror System ◽  
Gap Size ◽  
Plasmonic Enhancement ◽  
Practical Applications ◽  
Highly Efficient ◽  
System P ◽  
Metallic Mirror

Highly efficient nanoparticle-on-metallic-mirror (NPOM) systems with a large gap size exhibiting good plasmonic enhancement are desirable for numerous practical applications.

Production and STEM examination of controlled-size silver clusters

1983 ◽  
Vol 41 ◽  
pp. 338-339
Author(s):  
M. A. Listvan ◽  
R. P. Andres
Keyword(s):  
Cluster Size ◽  
Metal Clusters ◽  
Experimental Parameter ◽  
Carbon Films ◽  
Metal Species ◽  
Silver Clusters ◽  
Free Jet ◽  
Size Dependent ◽  
Cluster Properties ◽  
Controllable Size

Knowledge of the function and structure of small metal clusters is one goal of research in catalysis. One important experimental parameter is cluster size. Ideally, one would like to produce metal clusters of regulated size in order to characterize size-dependent cluster properties.A source has been developed which is capable of producing microscopic metal clusters of controllable size (in the range 5-500 atoms) This source, the Multiple Expansion Cluster Source, with a Free Jet Deceleration Filter (MECS/FJDF) operates as follows. The bulk metal is heated in an oven to give controlled concentrations of monomer and dimer which were expanded sonically. These metal species were quenched and condensed in He and filtered to produce areosol particles of a controlled size as verified by mass spectrometer measurements. The clusters were caught on pre-mounted, clean carbon films. The grids were then transferred in air for microscopic examination. MECS/FJDF was used to produce two different sizes of silver clusters for this study: nominally Ag6 and Ag50.

Transfer Technique for Electron Microscopy of Membrance Filter Samples

1974 ◽  
Vol 32 ◽  
pp. 554-555
Author(s):  
Lawrence W. Ortiz ◽  
Bonnie L. Isom
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Pore Size ◽  
Membrane Filters ◽  
Size Dependent

A procedure is described for the quantitative transfer of fibers and particulates collected on membrane filters to electron microscope (EM) grids. Various Millipore MF filters (Millipore AA, HA, GS, and VM; 0.8, 0.45, 0.22 and 0.05 μm mean pore size) have been used with success. Observed particle losses have not been size dependent and have not exceeded 10%. With fibers (glass or asbestos) as the collected media this observed loss is approximately 3%.

Spindle scaling mechanisms

2020 ◽  
Vol 64 (2) ◽  
pp. 383-396
Author(s):  
Lara K. Krüger ◽  
Phong T. Tran
Keyword(s):  
Cell Size ◽  
Spindle Assembly ◽  
Dependent Manner ◽  
Post Translational Modification ◽  
Size Dependent ◽  
A Cell ◽  
Chromosome Separation ◽  
Spindle Elongation ◽  
Protein Gradients ◽  
Spindle Structure

Abstract The mitotic spindle robustly scales with cell size in a plethora of different organisms. During development and throughout evolution, the spindle adjusts to cell size in metazoans and yeast in order to ensure faithful chromosome separation. Spindle adjustment to cell size occurs by the scaling of spindle length, spindle shape and the velocity of spindle assembly and elongation. Different mechanisms, depending on spindle structure and organism, account for these scaling relationships. The limited availability of critical spindle components, protein gradients, sequestration of spindle components, or post-translational modification and differential expression levels have been implicated in the regulation of spindle length and the spindle assembly/elongation velocity in a cell size-dependent manner. In this review, we will discuss the phenomenon and mechanisms of spindle length, spindle shape and spindle elongation velocity scaling with cell size.

Tantalum superconducting tunnel junctions for photon counting detectors

2002 ◽  
Vol 12 (3) ◽  
pp. 145-148
Author(s):  
C. Jorel ◽  
P. Feautrier ◽  
J.-C. Villégier ◽  
A. Benoit
Keyword(s):  
Tunnel Junctions ◽  
Photon Counting ◽  
Superconducting Tunnel Junctions ◽  
Photon Counting Detectors
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