scholarly journals Terahertz Absorber with Graphene Enhanced Polymer Hemispheres Array

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2494
Author(s):  
Alesia Paddubskaya ◽  
Nadzeya Valynets ◽  
Sergey Maksimenko ◽  
Mukesh Kumar ◽  
Marian Baah ◽  
...  
Keyword(s):  
Metal Layer ◽  
Scaling Up ◽  
Conductive Layer ◽  
Frequency Range ◽  
Regular Array ◽  
Thin Metal Layer ◽  
Terahertz Absorber ◽  
Original Technique ◽  
Electromagnetic Responses ◽  
3D Printed

We propose an original technique for the fabrication of terahertz (THz) metasurfaces comprising a 3D printed regular array of polymer hemispheres covered with a thin conductive layer. We demonstrate that the deposition of a thin metal layer onto polymer hemispheres suppresses the THz reflectivity to almost zero, while the frequency range of such a suppression can be considerably broadened by enhancing the structure with graphene. Scaling up of the proposed technique makes it possible to tailor the electromagnetic responses of metasurfaces and allows for the fabrication of various components of THz photonics.

Permafrost mapping by audiofrequency magnetotellurics

1978 ◽  
Vol 15 (10) ◽  
pp. 1539-1546 ◽  
Author(s):  
A. Koziar ◽  
D. W. Strangway
Keyword(s):  
Mackenzie Delta ◽  
Conductive Layer ◽  
Frequency Range ◽  
Layer Model ◽  
Resistive Layer ◽  
Asymptotic Models ◽  
Two Layer Model ◽  
Electrical Methods ◽  
Permafrost Mapping ◽  
Lateral Variations

The audiofrequency magnetotelluric (AMT) method has been used to study permafrost thickness near Tuktoyaktuk, N.W.T. in the Mackenzie Delta. In the frequency range of 10 Hz–10 kHz the permafrost behaves as a simple resistive layer over a conductive layer. This simple two-layer model can be inverted by asymptotic models to give a unique value for the thickness of the highly resistive frozen layer. In areas of simple layering, these results correlate well with drilling. In areas of sharp lateral variations in resistivity, depths tend to be underestimated. Unlike other electrical methods, AMT is not hampered by the presence of a surface melt layer in the summer if the conductivity–thickness product of this 'active layer' is less than about 0.03 mho (0.03 S).

Shift and elimination of microwave Fabry-Perot resonances in a dielectric covered with a thin metal layer

2015 ◽  
Vol 117 (16) ◽  
pp. 165302 ◽  
Author(s):  
Paulius Ragulis ◽  
Rimantas Simniškis ◽  
Žilvinas Kancleris
Keyword(s):  
Metal Layer ◽  
Thin Metal ◽  
Thin Metal Layer ◽  
Fabry Perot

Optical role of the thin metal layer in a TiOx/Ag/TiOx transparent and conductive electrode for organic solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 108034-108044 ◽  
Author(s):  
Adrien Bou ◽  
Malika Chalh ◽  
Sylvain Vedraine ◽  
Bruno Lucas ◽  
Damien Barakel ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Crucial Role ◽  
Silver Oxide ◽  
Metal Layer ◽  
Thin Metal ◽  
Thin Metal Layer

Quantification of the crucial role of the thin metal layer on the prediction of the optical properties of oxide/silver/oxide is established.

Organic light-emitting transistors with a thin metal layer covering a diffraction grating

2016 ◽  
Vol 629 (1) ◽  
pp. 218-223 ◽  
Author(s):  
Yuki Obama ◽  
Yusaku Sakurai ◽  
Takenori Kitazawa ◽  
Takeshi Yamao ◽  
Shu Hotta
Keyword(s):  
Diffraction Grating ◽  
Metal Layer ◽  
Thin Metal ◽  
Light Emitting ◽  
Thin Metal Layer ◽  
Organic Light ◽  
Light Emitting Transistors
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