Device for transforming electromagnetic field to coherent form

FIELD: technical physics, possible use for expanding arsenal of devices for transformation of electromagnetic field to coherent form.

SUBSTANCE: the device contains semiconductor substrate, on which in slits self-affine topology is formed on basis of fractalizing module, consisting of a set of circles with radius R, where first circle is geometrical locus of positions of centers of other circles of the set with equal distances between adjacent circles, center of first circle coincides with the center of circle with radius equal to 2R and is the center of the whole self-affine topology, and fractalization of module occurs along axes, passing through the center of the first circle and centers of other circles of the set. Self-affine architecture is grounded.

EFFECT: creation of planar source of device for transformation of electromagnetic radiation to coherent form.

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The present invention relates to the technical physics and can be used mainly in applications where it is necessary to ensure that the impact of coherent electromagnetic fields on various physical, chemical and biological processes.

The word "coherence" refers to the consistency, communication. As applied to electromagnetic radiation it refers to consistency, communication between electromagnetic oscillations, waves. Because the radiation is distributed in time and space, we can estimate the coherence of the oscillations emitted by the source at different points in time, in the same point of space (temporal coherence), as well as the coherence of the oscillations radiated at the same time at different points in space (spatial coherence) (Astarohanov. Principles of amplification of optical radiation. The tutorial. SPb, SP NRU ITMO, 2005).

Known source of quasi-coherent radiation, which is made on the basis of a heated black body (Greffet J-J et'an, Coherent emission jf light by thermal sources. Letters to nature. Vol.416, p.61-64, 2002). Usually heat the light emitting source, such as a black body or filament of incandescent bulbs, considered as examples of sources of non-coherent radiation, in contrast to the laser. While the laser is East is cinecom monochromatic and directional radiation, radiation of a heated black body has a wide range and is usually quasi-izotropnoe.

It is taken for granted that the light spontaneously emitted from different locations on a heat source, cannot interfere. Conversely, the radiation from different points of the antenna interferes in certain directions, creating petals. The intensity of the radiation heat source is the sum of the intensities emitted from different points, and therefore the emitted light cannot be directed. But, nevertheless, this work demonstrates the possibility of obtaining a planar source of coherent radiation. To use the black body as a source of coherent radiation was carved plate of polarizable material, which is made of a periodic structure in the form of parallel slits. The parameters were calculated based on the possibility of obtaining radiation with a wavelength of λ=11,36 μm. For this condition the length of the heated plate was chosen equal to 5 mm, the depth of the slits is λ/40, the slits d 0,55λ. The obtained quasi-monochromatic radiation in a zone remote from the substrate surface at a distance of from 10 to 100 nm. The radiation is focused and has a shape similar to the pattern of the antenna. Obviously, in the space of the narrow section of cogere the spas radiation in the infrared region provides a regular structure cracks, made in a material having the property of polarization. But the size of the plot of the existence of monochromatic radiation are so small that all observable physical effects can be seen only through a microscope.

The closest to the essential features to the present invention is a device for structuring the electromagnetic field (Patent RU №2249862). The known device comprises a semiconductor substrate on which slits are formed Samoobrona (self-similar) topology-based praktilisusega module, consisting of the set of circles with radius R, where the first circle is the geometric location of the centers of the other circles together with equal distances between adjacent circles, the center of the first circle coincides with the center of the circle with radius equal to 2R, and is the center of all chemoaffinity topology, and fractalization module is the axis passing through the center of the first circle and the other centers of the circles together.

In the known device Samoobrona structure, made slits, was used as a diffraction grating with a complex ordered structure collected from closed curvilinear elements formed closed slits, which, as a system of waveguides, apply e is ctromagnetic waves. In the crevices of the interference takes several continuous electromagnetic waves, which leads to resonant complete reflection of energy, which affects the interference pattern in the near field and far field.

The task to be solved by the invention is the creation of a planar device for converting electromagnetic radiation into a coherent form.

The problem is solved due to the fact that the proposed device, as known, includes a semiconductor substrate on which slits are formed Samoobrona (self-similar) topology-based praktilisusega module, consisting of the set of circles with radius R, where the first circle is the geometric location of the centers of the other circles together with equal distances between adjacent circles, the center of the first circle coincides with the center of the circle with radius equal to 2R, and is the center of all chemoaffinity topology, and fractalization module is the axis passing through the center of the first circle and the other centers of the circles together. But in contrast to the known Samoobrona structure grounded.

Simulation and experimentally it was found that the electromagnetic field after interaction with the above-described Samoa is Finney structure becomes stable form, which remains virtually unchanged when changing the frequency of the incident radiation. With the length of her enough for her to see with the naked eye.

The invention is illustrated by drawings, where:

figure 1 presents an example of implementation of the proposed device;

figa and 3A presents the amplitude distribution of the radiation at various frequencies after interaction with chemoaffinity structure, and figb and 3b - phase distribution of the radiation at various frequencies;

figure 4 - slice of radiation over the substrate with a grounded structure in the plane perpendicular to the substrate;

Figure 5 - spatial amplitude distribution of the radiation on the surface of the structure (different projection);

6 is a photograph of the received radiation.

Figure 1 shows the embodiment of the proposed device. While the number of circles with radius R equal to 9, respectively, the number of axes of fractalization is 8, the radius of the maximum circle chemoaffinity patterns is equal to 8R. The structure is made on a silicon substrate with a thickness of 1 mm, the diameter of which is equal to 6 mm, on the surface of which a slit width of 1 μm and a depth of 1.2 μm. The grounded structure.

Modern technologies allow us to perform much more complex structure, but even with a simple increase in the number of circles in basavanagudi drawing lines merge and lose clarity.

To simulate the process used in the transformed equation of schrödinger, which describes the interaction of electromagnetic waves with the surface of the plate.

where F is a function that is proportional to the intensity of the radiation, r is the length of the radius vector,

ϕ polar angle, a and b are constants.

The simulation was changed frequency radiation.

On figa and 2B presents the amplitude and phase (respectively) the field distribution on the area of the device when the wavelength of the incident radiation, equal to half the length of the maximum circumference chemoaffinity patterns, and figa and 3b - amplitude and phase distribution of the field at a wavelength of equal to 1/64 of the maximum length of a circle.

When the image analysis shows that equal amplitude are grouped in the same areas with alternating maxima and minima. The same is true for the phase distribution with alternating maxima and minima.

The comparison of these images shows that the change of the structured field practically does not occur when changing the frequency (wavelength).

The simulation was considered that the surface reflects most of the radiation, and cracks absorb most of the radiation. The reflection coefficient of the surface was taken as the value of that man who is within 1≥ ρ≥0.6 absorption coefficient slots 1≥α>to 0.6. The deeper the crack, the greater the absorption coefficient. For dierent values of these coefficients were obtained similar results strength distribution E in the space.

Figure 4 shows a slice of radiation over the substrate with a grounded center in the plane perpendicular to the substrate. In this chart, the substrate is on the y axis and occupies the space coordinates from 30 to coordinates 90. The diameter chemoaffinity patterns is equal to 6 mm, the depth of the slits is 1.6 μm. Tension E had the appearance of a pulse. The x-axis is the height above the surface of the structure. Zone 1 correspond to the minimum tension, and zone 2 corresponds to the maximum tension. The length of the coherent part of the field reaches 20 mm,

Condition for the existence of coherent forms of electromagnetic radiation is the fulfillment of a substrate of semiconductor material. It is known that semiconductors are inherent in the phenomenon of polarization, i.e. the spatial charge separation under the influence of an electric field. When getting radiation on the surface of the semiconductor substrate occurs the phenomenon of displacement and due to the fact that in the region of the slits, the substrate has a smaller thickness, the concentration of charge carriers in the grooves will be substantially higher than in neighboring areas. For p is ostomy can be considered, that all charge carriers are concentrated in the cracks. Upon reaching potential difference in adjacent slots of a certain critical value breakdown occurs at the shortest distance between the slits, i.e. you receive a shock of a certain wavelength, and accordingly, the electric component of the tension that is constant for each plot. The simulation (figure 5) shows that regardless of the conditions at the boundary of the surface, after some time, set sustainable and soliton-like distribution of amplitude over the surface of the plate.

The main conclusions that can be done on the simulation results: Samoobrona structure, made with ground on the semiconductor substrate converts electromagnetic radiation into a coherent form. The result of decomposition of the radiation does not depend on the characteristics of the incident radiation.

We are working experimental evidence obtained from simulation results. In particular, the plate with chemoaffinity structure was irradiated with a halogen lamp. The substrate whose size was 6 mm, the selected silicon, the depth of the cracks was 1.2 μm, the base module contains the 9 circles of radius R and 9 circles of radiusi.e. had 8 axes fractalization, and the maximum circle had a radius equal to . While visually it was possible to observe scaly hemisphere, above which rose weakly visible cylinder, inside of which was formed poorly visible cone. To obtain high-quality pictures from the brightness of the radiation. The photograph presented in Fig.6 treated to something to be seen, except for the bright spot, so it is not informative.

A device for converting the electromagnetic field into a coherent form that includes a semiconductor substrate on which slits are formed Samoobrona topology-based praktilisusega module, consisting of the set of circles with radius R, where the first circle is the geometric location of the centers of the other circles together with equal distances between adjacent circles, the center of the first circle coincides with the center of the circle with radius equal to 2R, and is the center of all chemoaffinity topology, and fractalization module is the axis passing through the center of the first circle and the other centers of the circles together, characterized in that Samoobrona structure grounded.



 

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