Artificial magnetic localized surface plasmon power divider based on spirally slotted Y-shaped structure

Abstract

The present invention discloses an artificial magnetic localized surface plasmon power divider based on a spiral slotted Y-shaped structure, comprising at least three spiral slotted structures whose first center lines are parallel to the horizontal line of a dielectric substrate, and at least three spiral slotted structures whose second center lines and third center lines are Y-shaped with the first center line. The transmission of artificial magnetic localized surface plasmons is supported by the spiral slotted structure. Since the magnetic mode has angular uniformity, artificial localized surface plasmons can be transmitted at large angles on the spiral slotted structure, which solves the current research status that the spiral slotted structure can only be transmitted in straight lines and at right angles; at the same time, the diameter of the spiral slotted structure is 10.6 mm, which is much smaller than its working wavelength, providing ideas for the design of deep subwavelength devices; by appropriately scaling down the power divider, it can also work in different frequency bands, thereby improving the application of artificial localized surface plasmons.

Description

Technical Field

[0001] The present invention relates to the technical field of power dividers, and in particular to an artificial magnetic localized surface plasmon power divider based on a spirally slotted Y-shaped structure. Background Art

[0002] A power divider is a device that divides the energy of an input signal into two or more equal or unequal energy outputs. As a type of artificial surface plasmon, artificial localized surface plasmons are generated by the resonance of electromagnetic waves within a certain range, and can be transmitted in the low-frequency (microwave and terahertz) band. The transmission characteristics in this band have subwavelength confinement characteristics and field enhancement capabilities similar to those of surface plasmons transmitted in the optical band. Recent studies have shown that spiral slotted structures can support the transmission of artificial localized surface plasmons and can excite radial independent electric modes and angular uniform magnetic modes. Since the radiation loss of magnetic dipoles is lower than that of electric dipoles of similar size, artificial localized surface plasmons can be transmitted over longer distances on spiral slotted structures using magnetic modes. However, current research does not involve structures that use spiral slotted structures to achieve large-angle bending and thus achieve power division effects, which greatly limits the application of artificial localized surface plasmons. Summary of the invention

[0003] The purpose of the present invention is to provide an artificial magnetic localized surface plasmon power divider based on a spirally slotted Y-shaped structure, aiming to solve the problem that there is currently no structure that uses a spirally slotted structure to achieve large-angle bending and thus achieve a power dividing effect, which greatly limits the application of artificial localized surface plasmons.

[0004] To achieve the above-mentioned object, the present invention provides an artificial magnetic localized surface plasmon power divider based on a spirally grooved Y-shaped structure, comprising a dielectric substrate and at least seven spirally grooved structures, wherein at least seven spirally grooved structures are located on the dielectric substrate, a first center line of at least three of the spirally grooved structures is parallel to a horizontal line of the dielectric substrate, a second center line of at least three of the spirally grooved structures has an angle with the first center line, a third center line of at least three of the spirally grooved structures has an angle with the first center line, the first center line, the second center line and the third center line are Y-shaped, and one end point of the first center line, the second center line and the third center line is located at the center of the same spirally grooved structure.

[0005] Wherein, the angle is 45°.

[0006] The center distance between two adjacent spiral groove structures is equal, and the center distance is 10.8 mm.

[0007] Wherein, the diameter of the spiral slotted structure is 10.6 mm.

[0008] Wherein, the spiral slotted structure comprises two spiral arms, and one ends of the two spiral arms overlap.

[0009] The width of the spiral arm is 0.2 mm, and the distance between two spiral arms is 0.65 mm.

[0010] Wherein, the number of turns of the spiral arm is 3.

[0011] The present invention provides an artificial magnetic localized surface plasmon power divider based on a spiral slotted Y-shaped structure, wherein at least seven spiral slotted structures are located on the dielectric substrate, the first center connecting lines of at least three spiral slotted structures are parallel to the horizontal line of the dielectric substrate, the second center connecting lines of at least three spiral slotted structures have an angle with the first center connecting line, the third center connecting lines of at least three spiral slotted structures have an angle with the first center connecting line, the first center connecting line, the second center connecting line and the third center connecting line are Y-shaped, and one end point of the first center connecting line, the second center connecting line and the third center connecting line is located at the center of the same spiral slotted structure. The spiral slotted structure can support the transmission of artificial magnetic localized surface plasmons. Since the magnetic mode has angular uniformity, the artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-type structure can undergo large-angle bending transmission, which solves the current research status that the spiral grooved structure can only transmit in a straight line and at right angles; at the same time, the diameter of the spiral grooved structure is 10.6 mm, which is much smaller than its working wavelength, providing ideas for the design of deep subwavelength devices; the artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-type structure can be appropriately scaled down, and can also work in different frequency bands, such as the terahertz frequency band, thereby improving the application of artificial localized surface plasmons. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of the spiral slotted structure of the present invention;

[0014] Figure 2It is a schematic structural diagram of an artificial magnetic localized surface plasmon power divider based on a spirally slotted Y-shaped structure of the present invention;

[0015] Figure 3 It is a schematic diagram of the transmission curve of the artificial magnetic localized surface plasmon power divider based on the spiral slotted Y-shaped structure with β = 45° and the five spiral slotted structures with β = 0°;

[0016] Figure 4 It is a schematic diagram of magnetic field distribution when β = 45°;

[0017] Figure 5 It is a schematic diagram of the magnetic field intensity curve at the Probe- and Probe+ ports when β = 45°;

[0018] In the figure: 100-artificial magnetic localized surface plasmon power divider based on spiral grooved Y-shaped structure, 1-dielectric substrate, 2-spiral grooved structure, 21-first center line, 22-second center line, 23-the third center line. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0021] See also Figure 2, is a schematic diagram of the structure of an artificial magnetic localized surface plasmon power divider 100 based on a spiral grooved Y-shaped structure provided by the present invention. Specifically, the artificial magnetic localized surface plasmon power divider 100 based on a spiral grooved Y-shaped structure includes a dielectric substrate 1 and at least seven spiral grooved structures 2, at least seven spiral grooved structures 2 are located on the dielectric substrate 1, at least three of the first center lines 21 of the spiral grooved structures 2 are parallel to the horizontal line of the dielectric substrate 1, at least three of the second center lines 22 of the spiral grooved structures 2 have an angle with the first center line 21, at least three of the third center lines of the spiral grooved structures 2 have an angle with the first center line 21, and The first center line 21, the second center line 22 and the third center line 23 are Y-shaped, and one end point of the first center line 21, the second center line 22 and the third center line 23 is located at the center of the same spiral slotted structure 2, the first center line 21 is the straight arm of the artificial magnetic localized surface plasmon power divider 100 based on the spiral slotted Y-shaped structure, and the second center line 22 and the third center line 23 are the two side arms of the artificial magnetic localized surface plasmon power divider 100 based on the spiral slotted Y-shaped structure. The angle β is 45°. The center distances of two adjacent spiral slotted structures 2 are equal, and the center distance d is 10.8 mm. Please refer to Figure 1 , Figure 1 : is a schematic diagram of the structure of the spiral slot structure 2. The diameter R of the spiral slot structure 2 is 10.6 mm, which is much smaller than its working wavelength (about 131 mm). The spiral slot structure 2 includes two spiral arms, and one end of the two spiral arms overlaps. The width w of the spiral arm is 0.2 mm, and the distance g between the two spiral arms is 0.65 mm. The number of turns of the spiral arm is 3. Please refer to Figure 3 , Figure 3 The transmission curve diagram of the artificial magnetic localized surface plasmon power divider 100 based on the spiral slotted Y-shaped structure with β = 45° and five spiral slotted structures 2 with β = 0° is shown in FIG. 1 . When there are only five spiral slotted structures 2, that is, only one straight arm and one side arm, the frequency at the resonance point of the transmission curve basically coincides, which is about 2.33 GHz. When the artificial magnetic localized surface plasmon power divider 100 based on the spiral slotted Y-shaped structure, that is, one straight arm and two side arms, the magnetic field distribution diagram is shown in FIG. Figure 4 See Figure 5 , Figure 5 It is a schematic diagram of the magnetic field strength curve at the Probe- and Probe+ ports when β=45°; when the third spiral slot structure 2 is transmitting, the magnetic field strength at the Probe- port is greater than that at the Probe+ port. When the remaining spiral slot structures 2 are transmitting, the magnetic field strength at the Probe- port is smaller. Figure 3 These are the transmission curves for linear transmission and Y-type transmission. Since the resonance points of the transmission curves are basically the same, it can be explained that the Y-type structure proposed in this patent achieves the power division effect. Figure 4 The magnetic field intensity distribution diagram of the power divider is a qualitative analysis method for observing the properties of the power divider. Figure 4 It can be seen from the figure that the field pattern is symmetrical about the main arm (if viewed intuitively, black and white can be observed), that is, the black and white colors are symmetrical about the main arm. Figure 5 It is the magnetic field strength curve of the power divider through the main arm and the upper and lower side arms. From the figure, it can be seen that the ups and downs of the two curves are basically consistent. It shows that the ups and downs of the magnetic field strength generated by the path of the magnetic field strength are consistent, that is, its power division properties are verified. The specific difference is that the magnetic field strength at the same position is different. An artificial magnetic localized surface plasmon power divider 100 based on a spiral grooved Y-shaped structure of the present invention is located on the dielectric substrate 1 through at least seven of the spiral grooved structures 2, and the first center line 21 of at least three of the spiral grooved structures 2 is parallel to the horizontal line of the dielectric substrate 1, and the second center line 22 of at least three of the spiral grooved structures 2 has an angle with the first center line 21, and the third center line of at least three of the spiral grooved structures 2 has an angle with the first center line 21, and the first center line 21, the second center line 22 and the third center line 23 are Y-shaped, and one end point of the first center line 21, the second center line 22 and the third center line 23 is located at the center of the same spiral grooved structure 2. The spiral slotted structure 2 can support the transmission of artificial magnetic localized surface plasmons. Since the magnetic mode has angular uniformity, the artificial magnetic localized surface plasmon power divider 100 based on the spiral slotted Y-type structure can undergo large-angle bending transmission, which solves the drawback of the current research status that the spiral slotted structure 2 can only transmit in a straight line and at right angles; at the same time, the diameter of the spiral slotted structure 2 is 10.6 mm, which is much smaller than its working wavelength, providing ideas for the design of deep subwavelength devices; the artificial magnetic localized surface plasmon power divider 100 based on the spiral slotted Y-type structure is appropriately scaled down, and can also work in different frequency bands, such as the terahertz frequency band. The artificial magnetic localized surface plasmon power divider based on the spiral slotted Y-type structure of the present invention can not only realize the large-angle bending transmission of artificial localized surface plasmons, but also can use the spiral slotted structure to achieve the power division effect, and at the same time, the transmission path is more flexible, which improves the application of artificial localized surface plasmons.

[0022] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. An artificial magnetic localized surface plasmon power divider based on a spirally slotted Y-shaped structure, characterized in that: The invention comprises a dielectric substrate and at least seven spiral slotted structures, wherein at least seven spiral slotted structures are located on the dielectric substrate, a first center line of at least three of the spiral slotted structures is parallel to a horizontal line of the dielectric substrate, a second center line of at least three of the spiral slotted structures is at an angle to the first center line, a third center line of at least three of the spiral slotted structures is at an angle to the first center line, the first center line, the second center line and the third center line are Y-shaped, and one end point of the first center line, the second center line and the third center line is located at the center of the same spiral slotted structure; The first center line is the straight arm of the artificial magnetic localized surface plasmon power divider based on the spirally grooved Y-shaped structure, and the second center line and the third center line are the two side arms of the artificial magnetic localized surface plasmon power divider based on the spirally grooved Y-shaped structure.

2. The artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-shaped structure according to claim 1, characterized in that: The angle is 45°.

3. The artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-shaped structure according to claim 2, characterized in that: The center distance between two adjacent spiral groove structures is equal, and the center distance is 10.8 mm.

4. The artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-shaped structure according to claim 3, characterized in that: The diameter of the spiral slotted structure is 10.6 mm.

5. The artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-shaped structure according to claim 4, characterized in that: The spiral slotted structure includes two spiral arms, and one end of the two spiral arms overlaps.

6. The artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-shaped structure according to claim 5, characterized in that: The width of the spiral arm is 0.2 mm, and the distance between two spiral arms is 0.65 mm.

7. The artificial magnetic localized surface plasmon power divider based on the spiral grooved Y-shaped structure according to claim 6, characterized in that: The number of turns of the spiral arm is 3.

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