scholarly journals Determining the terahertz optical properties of subwavelength films using semiconductor surface plasmons

2008 ◽  
Vol 93 (24) ◽  
pp. 241115 ◽  
Author(s):  
T. H. Isaac ◽  
W. L. Barnes ◽  
E. Hendry
Keyword(s):  
Optical Properties ◽  
Surface Plasmons ◽  
Semiconductor Surface

scholarly journals First Principle Calculation of Electronic, Optical Properties and Photocatalytic Potential of CuO Surfaces

2016 ◽  
Vol 1 ◽  
Author(s):  
Faozan Ahmad
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Band Gap ◽  
Water Splitting ◽  
Co2 Reduction ◽  
Band Edge ◽  
Semiconductor Surface ◽  
First Principle Calculation ◽  
Stable Surface ◽  
Input Parameters

<p class="TTPKeywords">We have performed DFT calculations of electronic structure, optical properties and photocatalytic potential of the low-index surfaces of CuO. Photocatalytic reaction on the surface of semiconductor requires the appropriate band edge of the semiconductor surface to drive redox reactions. The calculation begins with the electronic structure of bulk system; it aims to determine realistic input parameters and band gap prediction. CuO is an antiferromagnetic material with strong electronic correlations, so that we have applied DFT + U calculation with spin polarized approach, beside it, we also have used GW approximation to get band gap correction. Based on the input parameters obtained, then we calculate surface energy, work function and band edge of the surfaces based on a framework developed by Bendavid et al (J. Phys. Chem. B, 117, 15750-15760) and then they are aligned with redox potential needed for water splitting and CO<sub>2</sub> reduction. Based on the calculations result can be concluded that not all of low-index CuO have appropriate band edge to push reaction of water splitting and CO2 reduction, only the surface CuO(111) and CuO(011) which meets the required band edge. Fortunately, based on the formation energy, CuO(111) and CuO(011) is the most stable surface. The last we calculate electronic structure and optical properties (dielectric function) of low-index surface of CuO, in order to determine the surface state of the most stable surface of CuO.</p>

Optical properties of InN related to surface plasmons

2005 ◽  
Vol 202 (14) ◽  
pp. 2633-2641 ◽  
Author(s):  
T. V. Shubina ◽  
J. Leymarie ◽  
V. N. Jmerik ◽  
A. A. Toropov ◽  
A. Vasson ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmons

Morphology and optical properties of discontinuous gold films on semiconductor surface

2002 ◽  
Author(s):  
Tetyana R. Barlas ◽  
Nikolas L. Dmitruk ◽  
Volodymyr R. Romaniuk
Keyword(s):  
Optical Properties ◽  
Semiconductor Surface ◽  
Gold Films

Extra green light induced ZnO ultraviolet lasing enhancement assisted by Au surface plasmons

Nanoscale ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 623-627 ◽  
Author(s):  
F. F. Qin ◽  
C. X. Xu ◽  
Q. X. Zhu ◽  
J. F. Lu ◽  
D. T. You ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Optical Properties ◽  
Laser Beam ◽  
Surface Plasmons ◽  
Green Light ◽  
Light Excitation ◽  
Beam Excitation

A hybrid Au/ZnO microcavity was constructed and made the optical properties of the microcavity improve under single and multi-laser beam excitation because of LSP induced electron transfer. Utilizing this mechanism, we realized an even further improvement of the tunable lasing behavior through extra green light excitation.

On the topographic and optical properties of SiC/SiO2 surfaces

Open Physics ◽  
2009 ◽  
Vol 7 (2) ◽  
Author(s):  
Stanislav Jureckova ◽  
Maria Jureckova ◽  
Ferdinand Chovanec ◽  
Hikaru Kobayashi ◽  
Masao Takahashi ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Optical Properties ◽  
Fractal Geometry ◽  
Semiconductor Surface ◽  
Force Microscopy ◽  
Atomic Force ◽  
Fine Surface ◽  
Scanning Tunnelling ◽  
Tunnelling Microscopy ◽  
Surface Changes

AbstractThe roughness of the semiconductor surface substantially influences properties of the whole structure, especially when thin films are created. In our work 3C SiC, 4H SiC and Si/a-SiC:H/SiO2 structures treated by various oxidation a passivation procedures are studied by atomic force microscopy (AFM) and scanning tunnelling microscopy (STM). Surface roughness properties are studied by fractal geometry methods. The complexity of the analysed surface is sensitive to the oxidation and passivation steps and the proposed fractal complexity measure values enable quantification of the fine surface changes. We also determined the optical properties of oxidized and passivated samples by using visual modelling and stochastic optimization.

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