مهندسی دریا
Alireza Abdikian
Abstract
In this article, spectrum of the reflection, transmission and absorption of the thin metal nano-layer by using quantum hydrodynamic equations is studied. The thin metal nano-layer can be used to cover the equipment and devices to avoid detection which coated the outer surface of the submarines, ships, ...
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In this article, spectrum of the reflection, transmission and absorption of the thin metal nano-layer by using quantum hydrodynamic equations is studied. The thin metal nano-layer can be used to cover the equipment and devices to avoid detection which coated the outer surface of the submarines, ships, planes. It is also used the nano-layers to cover the various devices such as solar cells, glass reflex. In some devices, for example the solar cells, the more increase the absorption ratio, the more increase the efficiency and in some other devices, for example the reflex glasses, it is better to be high the reflection ratio. Hence, the study of the reflection, transmission and absorption ratio of electromagnetic waves are important in quantum plasma slabs. By combining the quantum hydrodynamic equations and the Maxwell's equations in the presence of a magnetic field can be obtained the coefficients of the reflection, transmission and absorption of electromagnetic waves in thin metal nano-layer in which we have taken the slab as quantum plasma. Clearly, it is shown that by taking term of the quantum Bohm's potential cause to appearance of the quantum refractive index for the Langmuir wave that this new refractive index does not have any similar relation in the classical plasma. Using the numerical values and the Mathematica software, the absorption coefficients have drawn in various conditions. This proposed method enables us practically to control the reflection or absorption power of electromagnetic waves in quantum plasma slab by adjusting a uniform external magnetic field.