Application of zinc borate crystal, magneto-optical crystal and magneto-optical device thereof

Abstract

The application relates to the technical field of magneto-optical crystals, in particular to application of a zinc borate crystal, a magneto-optical crystal and a magneto-optical device. The zinc borate crystal is Zn4B6O 13 The application provides application of the Zn4B6O 13 The application provides application of the Zn4B6O 13 The zinc borate crystal has a large Verdet coefficient and good transmittance in an ultraviolet wave band, and is a potential magneto-optical crystal material which can be well applied to the ultraviolet wave band.

Description

Technical Field

[0001] This invention relates to the field of magneto-optical crystal technology, and in particular to the application of zinc borate crystal, magneto-optical crystal, and magneto-optical device thereof. Background Technology

[0002] The magneto-optical effect refers to the change in the refractive index or transmittance of a material under the influence of an applied magnetic field. Its principle is based on the Kerr effect and the magnetic anisotropy effect. The Kerr effect refers to the change in the refractive index of a material under the influence of a magnetic field, while the magnetic anisotropy effect refers to the change in the anisotropy of a material under the influence of a magnetic field.

[0003] The phenomenon where the plane of polarization of linearly polarized light rotates when it passes through an optical crystal under the influence of an external magnetic field is called the Faraday effect. Such crystals are called magneto-optical crystals, or simply magneto-optical crystals.

[0004] Magneto-optic crystal materials exhibit a large pure Faraday effect, low absorption coefficient at the desired wavelength, and high magnetization and permeability. They are primarily used in the fabrication of optical isolators, optical non-reciprocal components, magneto-optical memories and modulators, fiber optic communication and integrated optical devices, computer storage, logic operations and transmission functions, magneto-optical displays, magneto-optical recording, novel microwave devices, and laser gyroscopes. With the continuous discovery of new magneto-optical crystal materials, the range of devices that can be fabricated using them will continue to expand.

[0005] Currently, the main practical magneto-optical materials are Tb3Sc2Al3O 12 (TSAG), Tb3Al5O 12 (TAG), Tb3Ga5O 12 (TGG), Y3Fe5O 12 Materials such as CdTe and HgCdTe have large Verdet coefficients (the Verdet coefficient characterizes the angle of polarization deflection of linearly polarized light per unit length under a unit magnetic field; a larger Verdet coefficient indicates better magneto-optical material performance). However, due to the presence of transition metals or rare earth elements, these elements exhibit strong absorption in the visible light band, especially the ultraviolet band, making them unsuitable for ultraviolet applications. While materials like CeF3, PrF3, LiTbF4, LiDyF4, LiHoF4, and LiErF4 can be used in the ultraviolet band, the encapsulated rare earth elements also have characteristic absorption peaks in the ultraviolet band, affecting transmittance and preventing their use across the entire ultraviolet spectrum. Materials such as ADA, KD2PO4 (DKDP), quartz, and MgF2, while exhibiting good transmittance in the ultraviolet band, all have relatively low Verdet coefficients. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides an application of zinc borate crystal, a magneto-optical crystal, and a magneto-optical device thereof. The zinc borate crystal provided by this invention has a large Verdet coefficient and good transmittance in the ultraviolet band, making it a potential magneto-optical crystal material well-suited for applications including the ultraviolet band.

[0007] In a first aspect, the present invention provides the application of zinc borate crystals, wherein the zinc borate crystals are Zn4B6O. 13 The zinc borate crystal is used as a magneto-optical crystal.

[0008] Preferably, the zinc borate crystal is suitable for use in the 200–3000 nm wavelength range as a magneto-optical crystal.

[0009] Further preferred, the Zn4B6O 13 Applications of crystals as magneto-optical crystals in the full ultraviolet band.

[0010] Preferred, Zn4B6O 13 For applications of crystals in the 200–400 nm ultraviolet magneto-optical crystal band, the preferred wavelength is 222–351 nm.

[0011] Preferably, according to the above-mentioned application of zinc borate crystals, the Zn4B6O 13 The space group of the crystal is I-43m, and the lattice constant is 7.44–7.49 Å.

[0012] Preferably, the Zn4B6O 13 The Verdet coefficient of the crystal in the range of 222–351 nm is 35–200 rad / m·T.

[0013] Further preferably, in the application of the above-mentioned zinc borate crystals, the Zn4B6O 13 Verdet coefficients of crystals: 35–43 rad / m·T for 351 nm, 51–61 rad / m·T for 308 nm, 92–112 rad / m·T for 248 nm, and 165–201 rad / m·T for 222 nm.

[0014] More preferably, the Zn4B6O 13 Verdet coefficients of crystals: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

[0015] Preferably, the zinc borate crystal is used in optoelectronic functional devices and / or laser-based devices.

[0016] Further preferably, the zinc borate crystal is applied to any one of magneto-optical isolators, magneto-optical memories, magneto-optical modulators, and Faraday rotators, and is preferably applied to magneto-optical isolators or magneto-optical modulators.

[0017] Secondly, the present invention provides a magneto-optical crystal, wherein the magneto-optical crystal is Zn4B6O. 13 Crystal, the Zn4B6O 13 The crystal has a space group of I-43m and a lattice constant of 7.44–7.49 Å; the Zn₄B₆O 13 The Verdet coefficient of the crystal in the range of 222–351 nm is preferably 35–200 rad / m·T.

[0018] Preferably, the Zn4B6O 13 Verdet coefficients of crystals: 35–43 rad / m·T for 351 nm, 51–61 rad / m·T for 308 nm, 92–112 rad / m·T for 248 nm, and 165–201 rad / m·T for 222 nm.

[0019] More preferably, the Zn4B6O 13 Verdet coefficients of crystals: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

[0020] Thirdly, the present invention provides a magneto-optical device, wherein the magneto-optical device is a magneto-optical isolator including the magneto-optical crystal.

[0021] Preferably, the magneto-optical isolator comprises a magneto-optical crystal, a permanent magnet, and a polarizer, wherein the Zn4B6O 13 The crystal is a magneto-optical crystal.

[0022] Fourthly, the present invention provides a magneto-optical device, wherein the magneto-optical device is a magneto-optical modulator including the magneto-optical crystal.

[0023] Preferably, the magneto-optical modulator includes a polarizer, an excitation coil, and a magneto-optical crystal, wherein the Zn4B6O 13 The crystal is a magneto-optical crystal.

[0024] The beneficial effects of this invention are at least as follows: This invention discovers Zn4B6O 13 The crystal has a larger Verdet coefficient than commonly used ultraviolet magneto-optical materials such as ADA, KD2PO4 (DKDP), quartz, and MgF2, while Zn4B6O 13 Crystals have good transmittance in the ultraviolet band, making them a potential magneto-optical crystal material for use in the ultraviolet band. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a magneto-optical isolator provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of a magneto-optical modulator provided in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0029] Unless otherwise specified, specific techniques or conditions in the embodiments of this invention shall be performed in accordance with the techniques or conditions described in the literature in this field, or in accordance with the product instructions. Devices, instruments, reagents, etc., whose manufacturers are not specified are all conventional products that can be purchased through legitimate channels. All raw materials used in this invention are readily available in the domestic market.

[0030] In the following embodiments of the present invention, zinc borate crystals Zn4B6O are used. 13 The source and preparation method are not limited; existing preparation processes or commercially available products can be used. For example, zinc borate crystals Zn4B6O in the embodiments of this invention... 13 The method of obtaining it adopts Zn4B6O as described in invention CN 113346858 A. 13 .

[0031] The following embodiments of the present invention provide an application of zinc borate crystal, a magneto-optical crystal, and a magneto-optical device thereof. The zinc borate crystal provided by the present invention has a large Verdet coefficient and good transmittance in the ultraviolet band, making it a potential magneto-optical crystal material that can be well applied in the ultraviolet band.

[0032] The application of zinc borate crystals provided in this embodiment of the invention, wherein the zinc borate crystals are Zn4B6O 13 The zinc borate crystal is used as a magneto-optical crystal.

[0033] The embodiments of the present invention use Zn4B6O 13 The crystal overcomes the current problems of poor ultraviolet transmittance of materials with large Verdet coefficients, or materials with good ultraviolet transmittance but low Verdet coefficients, effectively solving the difficulties in the application of magneto-optical crystals in the ultraviolet band.

[0034] In some preferred embodiments, the zinc borate crystal is suitable as a magneto-optical crystal in the wavelength range of 200–3000 nm.

[0035] In a further preferred embodiment, the Zn4B6O 13 Applications of Zn4B6O crystals as magneto-optical crystals across the entire ultraviolet band. This invention has discovered... 13 The crystal has a large Verdet coefficient, and Zn4B6O 13 The crystal has good transmittance in the ultraviolet band.

[0036] Some preferred embodiments, Zn4B6O 13 The crystal is used as a magneto-optical crystal in the ultraviolet band of 200-400nm, and a more preferred embodiment is 222-351nm.

[0037] As a preferred embodiment, based on the above-described application of zinc borate crystals, the Zn4B6O used in this embodiment of the invention... 13 The space group of the crystal is I-43m, and the lattice constant is 7.44–7.49 Å.

[0038] In other preferred embodiments, the Zn4B6O 13 The Verdet coefficient of the crystal in the range of 222–351 nm is 35–200 rad / m·T.

[0039] In a further preferred embodiment, in the application of the zinc borate crystals, Zn4B6O 13 Verdet coefficients of crystals: 35–43 rad / m·T for 351 nm, 51–61 rad / m·T for 308 nm, 92–112 rad / m·T for 248 nm, and 165–201 rad / m·T for 222 nm.

[0040] More preferably, the Zn4B6O used in the following specific embodiments of the present invention 13 Verdet coefficients of crystals: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

[0041] As a preferred embodiment, the zinc borate crystal is used in optoelectronic functional devices and / or laser-based devices.

[0042] In a further preferred embodiment, the zinc borate crystal is applied to any one of magneto-optical isolators, magneto-optical memories, magneto-optical modulators, and Faraday rotators.

[0043] In a further preferred embodiment, the zinc borate crystal is used in a magneto-optical isolator or a magneto-optical modulator. In this embodiment of the invention, Zn4B6O... 13 Its Verdet coefficient is greater than that of commonly used ultraviolet magneto-optical materials such as ADA, DKDP, Quartz, and MgF2, which can reduce the size of magneto-optical crystals and reduce the required external magnetic field.

[0044] This invention also provides a magneto-optical crystal, wherein the magneto-optical crystal is Zn4B6O. 13 Crystal, the Zn4B6O 13 The crystal has a space group of I-43m and a lattice constant of 7.44–7.49 Å; the Zn₄B₆O 13 The Verdet coefficient of the crystal in the range of 222–351 nm is preferably 35–200 rad / m·T.

[0045] As a preferred embodiment, the Zn4B6O 13 Verdet coefficients of crystals: 35–43 rad / m·T for 351 nm, 51–61 rad / m·T for 308 nm, 92–112 rad / m·T for 248 nm, and 165–201 rad / m·T for 222 nm.

[0046] More preferably, in this embodiment of the invention, Zn4B6O is used. 13 Verdet coefficients of crystals: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

[0047] This invention also provides a magneto-optical device, which is a magneto-optical isolator including the magneto-optical crystal.

[0048] In a preferred embodiment, the magneto-optical isolator comprises a magneto-optical crystal, a permanent magnet, and a polarizer, wherein the Zn4B6O 13 The crystal is a magneto-optical crystal.

[0049] This invention also provides a magneto-optical device, which is a magneto-optical modulator including the magneto-optical crystal.

[0050] In a preferred embodiment, the magneto-optical modulator includes a polarizer, an excitation coil, and a magneto-optical crystal, wherein the Zn4B6O 13 The crystal is a magneto-optical crystal.

[0051] Example 1

[0052] This invention provides a magneto-optical crystal, wherein the zinc borate crystal used is Zn4B6O. 13 Crystal; Zn4B6O 13 The space group of the crystal is I-43m, and the lattice constant is 7.44–7.49 Å.

[0053] Zn4B6O 13 Verdet coefficients of crystals: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

[0054] Zn4B6O 13 Table 1 shows a comparison of the Verdet coefficients of the crystal and commonly used ultraviolet magneto-optical materials.

[0055] Table 1 Zn4B6O 13 Compared with the Verdet coefficient (rad / m·T) of current ultraviolet magneto-optical materials

[0056] 351nm 308nm 248nm 222nm <![CDATA[Zn4B6O 13 ]]> 39 56 102.4 183 ADA 27.3 38 70.8 103.5 DKDP 15.3 20.7 35.7 48.8 Quartz 14.7 20 33.6 45 <![CDATA[MgF2]]> 8.16 10.0 18 18.8

[0057] Example 2

[0058] This invention provides a zinc borate crystal Zn4B6O produced in Example 1. 13 Magneto-optic isolators as magneto-optical crystals.

[0059] like Figure 1 As shown, this magneto-optical isolator comprises a magneto-optical crystal, a permanent magnet, and a polarizer. As shown in Table 1, Zn4B6O 13 The Verdet coefficients (39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm) are greater than those of commonly used ADA, DKDP, Quartz, and MgF2. This is achieved by using Zn4B6O 13 Magneto-optical crystals used as magneto-optical isolators can reduce their size and lower the required magnetic field. Compared to ADA (Magnetic Amplifier and Optical Isolator), they can reduce the size of the magneto-optical crystal or lower the required magnetic field for the same size magneto-optical crystal at the same power level, such as Zn4B6O. 13The Verdet coefficient at 351 nm is 39 rad / m·T, while the ADA coefficient is 27.3 rad / m·T. Zn4B6O is used. 13 Compared to ADA, the magneto-optical crystal used as a magneto-optical isolator can reduce the required size of the magneto-optical crystal by 1.43 times under the same applied magnetic field, or reduce the required applied magnetic field by 1.43 times under the same crystal size.

[0060] Example 3

[0061] This invention provides a zinc borate crystal Zn4B6O produced in Example 1. 13 Magneto-optic modulator as a magneto-optical crystal.

[0062] like Figure 2 As shown, the magneto-optical modulator provided in this embodiment of the invention includes a magneto-optical crystal, a polarizer, and an excitation coil. As shown in Table 1, Zn4B6O 13 The Verdet coefficients (39 rad / m·T at 351 nm, 56 rad / m·T at 308 nm, 102.4 rad / m·T at 248 nm, and 183 rad / m·T at 222 nm) are greater than those of commonly used ADA, DKDP, Quartz, and MgF2, which can reduce the size of magneto-optical crystals and lower the required external magnetic field. For example, Zn4B6O 13 The Verdet coefficient at 351 nm is 39 rad / m·T, while the ADA coefficient is 27.3 rad / m·T. Zn4B6O is used. 13 As a magneto-optical modulator, the magneto-optical crystal can reduce the required size of the magneto-optical crystal by 1.43 times or reduce the required external magnetic field by 1.43 times under the same applied magnetic field, compared with ADA.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An application of zinc borate crystals, characterized in that, The zinc borate crystal is Zn4B6O 13 Crystal, application of the zinc borate crystal as a 222-351 nm ultraviolet band magneto-optical crystal, the Zn4B6O 13 The space group of the crystal is I-43m, and the lattice constant is 7.44-7.49 angstroms.

2. The application of zinc borate crystals according to claim 1, characterized in that, The Zn4B6O 13 The Verdet coefficient of the crystal in the range of 222~351 nm is 35~200 rad / m·T.

3. The application of zinc borate crystals according to claim 2, characterized in that, The Zn4B6O 13 Verdet coefficients of crystals: 35~43 rad / m·T for 351nm, 51~61 rad / m·T for 308nm, 92~112 rad / m·T for 248nm, and 165~201 rad / m·T for 222nm.

4. The application of zinc borate crystals according to claim 3, characterized in that, The Zn4B6O 13 The Verdet coefficients of the crystals are: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

5. The application of zinc borate crystals according to any one of claims 1-4, characterized in that, The zinc borate crystals are used in optoelectronic functional devices or laser-based devices.

6. The application of zinc borate crystals according to claim 5, characterized in that, The zinc borate crystal is used in any of the following: magneto-optical isolators, magneto-optical memories, magneto-optical modulators, and Faraday rotators.

7. The application of zinc borate crystals according to claim 6, characterized in that, The zinc borate crystal is used in magneto-optical isolators or magneto-optical modulators.

8. A magneto-optical device, characterized in that, The magneto-optical device is a magneto-optical isolator including a magneto-optical crystal; the magneto-optical crystal is Zn4B6O. 13 Crystal, the Zn4B6O 13 The crystal has a space group of I-43m and a lattice constant of 7.44~7.49 Å; the Zn4B6O 13 The Verdet coefficient of the crystal in the range of 222~351 nm is 35~200 rad / m·T.

9. The magneto-optical device according to claim 8, characterized in that, The Zn4B6O 13 Verdet coefficients of crystals: 35~43 rad / m·T for 351nm, 51~61 rad / m·T for 308nm, 92~112 rad / m·T for 248nm, and 165~201 rad / m·T for 222nm.

10. The magneto-optical device according to claim 9, characterized in that, The Zn4B6O 13 The Verdet coefficients of the crystals are: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

11. The magneto-optical device according to any one of claims 8-10, characterized in that, The magneto-optical isolator comprises a magneto-optical crystal, a permanent magnet, and a polarizer, wherein the Zn4B6O 13 The crystal is a magneto-optical crystal.

12. A magneto-optical device, characterized in that, The magneto-optical device is a magneto-optical modulator including a magneto-optical crystal; the magneto-optical crystal is Zn4B6O. 13 Crystal, the Zn4B6O 13 The crystal has a space group of I-43m and a lattice constant of 7.44~7.49 Å; the Zn4B6O 13 The Verdet coefficient of the crystal in the range of 222~351 nm is 35~200 rad / m·T.

13. The magneto-optical device according to claim 12, characterized in that, The Zn4B6O 13 Verdet coefficients of crystals: 35~43 rad / m·T for 351nm, 51~61 rad / m·T for 308nm, 92~112 rad / m·T for 248nm, and 165~201 rad / m·T for 222nm.

14. The magneto-optical device according to claim 13, characterized in that, The Zn4B6O 13 The Verdet coefficients of the crystals are: 39 rad / m·T for 351 nm, 56 rad / m·T for 308 nm, 102.4 rad / m·T for 248 nm, and 183 rad / m·T for 222 nm.

15. The magneto-optical device according to any one of claims 12-14, characterized in that, The magneto-optical modulator includes a polarizer, an excitation coil, and a magneto-optical crystal, wherein the Zn4B6O 13 The crystal is a magneto-optical crystal.

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