Graphene terahertz power meter

Abstract

The utility model discloses a graphene terahertz power meter. The graphene terahertz power meter comprises a reflection condenser, a graphene absorber and a heat sink. Wherein the heat layer is located at the bottommost layer, the graphene absorber is located on the heat sink, the graphene coating is tightly coated on the aluminum metal square sheet, the absorber and the heat sink are fixed through a square groove, and the overall dimensions of the combination are the same. The bottom-layer heat sink is made of aluminum oxide, the side length of the bottom-layer heat sink is 70 mm, the thickness of the bottom-layer heat sink is 40 mm, the side length of an absorber groove in the upper surface of the bottom-layer heat sink is 50 mm, and the height of the bottom-layer heat sink is 36 mm. The terahertz radiation power meter has the advantages of being simple and compact in structure, easy to machine, high in stability, high in environmental adaptability and the like, the current situation that an original terahertz radiation power meter is low in sensitivity and response speed is improved, the defects that the original terahertz radiation power meter is unstable and needs to be fixed through a clamp are overcome, and precise measurement of terahertz radiation power is achieved.

Description

Technical Field

[0001] The utility model relates to a terahertz power meter, in particular to a graphene terahertz power meter. Background Art

[0002] Terahertz refers to electromagnetic waves with a frequency of 0.1 THz-10 THz. The long-wave direction mainly belongs to the field of electronics, while the short-wave direction mainly belongs to the field of photonics. It is between the mature microwave millimeter waves and infrared light. For a long time, due to the lack of effective generation and detection technology, terahertz has become the last frequency window in the electromagnetic spectrum to be fully understood.

[0003] Terahertz combines the characteristics of electronics and photonics, and has important application value and huge application potential in many fields such as physics, chemistry, biology, medicine, materials, and astronomy. As the core device in the terahertz field, the terahertz radiation power meter plays an important role in the terahertz system. Therefore, the accurate understanding of the terahertz radiation characteristics determines the application market of the terahertz system. As an indispensable device in terahertz application technology, increasing the research efforts on power meters will be beneficial to the development of terahertz technology. However, the existing power meters generally have the disadvantages of complex structure, slow response speed, low sensitivity and poor stability. In view of the above disadvantages, the utility model designs a graphene terahertz power meter with simple structure, fast response, high sensitivity and good stability. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a parabolic mirror clamp device.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The graphene terahertz power meter comprises three parts: a reflective concentrator, a graphene absorber and a heat sink; wherein the thermal layer is located at the bottom layer, the graphene absorber is located on the heat sink, the graphene coating is tightly coated on the square aluminum metal sheet, the absorber and the heat sink are fixed by a square groove, and the outer dimensions of this combination are the same. The utility model has the advantages of simple and compact structure, small size, high absorption rate, strong stability, easy processing and the like.

[0007] The bottom heat sink is made of alumina with a side length of 70mm and a thickness of 40mm. The side length of the absorber groove on the upper surface of the heat sink is 50mm, the height of the heat sink is 36mm, and there are M5 threaded holes with a depth of 14.4mm at the four corners of the heat sink surface for fixing with the front-end focusing reflector. There are two circular holes with a radius of 1.5mm and a depth of 36mm at the corners of the heat sink groove, which are directly connected to the bottom surface of the heat sink for outputting power signals. The absorber coating material is a mixture of graphene and fine particles. The coating shape is a square with a side length of 50mm and a thickness of 1mm. The bottom surface of the reflector concentrator has a side length of 7. The inner part is a semicircular cavity with a bottom radius of 30mm and a height of 30mm. The bottom of the cavity coincides with the bottom of the square. There is a cylindrical opening with a radius of 7.5mm and a depth of 2mm at the front end of the reflective concentrator for the optical path to enter the power meter. There are M5 nut slots at the four corners of the front end surface of the reflective concentrator, and four cylindrical holes at the bottom correspond to the four threaded holes of the heat sink. The graphene coating is tightly coated on the thermoelectric sensor, and the distance between the graphene coating surface and the groove surface of the heat sink is 4mm. The combination of the reflector part and the heat sink part is a rectangular structure as a whole.

[0008] The bottom heat sink is made of alumina with a thermal conductivity of 30 W / (m·K). The rectangular parallelepiped has a side length of 70 mm and a height of 32 mm. There are absorber grooves on the surface and four inclination angles. The heat sink has four M5 threaded holes and two wire output holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the graphene terahertz power meter;

[0010] Figure 2 It is a schematic diagram of the reflective concentrator structure of the graphene terahertz power meter;

[0011] Figure 3 It is a schematic diagram of the heat sink structure of the graphene terahertz power meter;

[0012] Figure 4 Schematic diagram of the absorber of the graphene terahertz power meter.

[0013] Marking instructions in the figure: 1. Bottom heat sink; 2. Internal graphene absorber; 3. Front reflective concentrator. DETAILED DESCRIPTION

[0014] like Figure 1 to Figure 4 As shown, the graphene terahertz power meter includes a bottom heat sink, an internal graphene absorber and a front reflective concentrator; wherein the graphene coating is tightly coated on the square thermoelectric sensor, and the absorber part and the heat sink part are connected together through a groove.

[0015] During implementation, the terahertz light is converged by a lens and incident on the absorber through the opening at the front end of the reflective concentrator. The reflective concentrator increases the absorption rate of the terahertz light and outputs an electrical signal through the thermoelectric sensor. The final size of the heat sink is determined through ANSYS simulation to ensure that the power meter is not affected by changes in ambient temperature.

Claims

1. A graphene terahertz power meter, characterized in that: The invention comprises a bottom heat sink (1), an internal graphene absorber (2) and a front-end reflective concentrator (3). The material of the front-end reflective concentrator (3) is alumina. The bottom surface is a square with a side length of 70 mm. The interior has a semicircular cavity with a radius of 30 mm and a height of 30 mm. The front end of the concentrator has a cylindrical opening with a radius of 7.5 mm and a depth of 2 mm. The front end of the concentrator has four cylindrical holes with nut grooves, which correspond to the threaded holes of the bottom heat sink respectively. The graphene coating is tightly coated on the thermoelectric sensor. The distance between the surface of the graphene coating and the groove surface of the heat sink surface is 4 mm. The combination of the reflective concentrator part and the heat sink part is a rectangular parallelepiped structure as a whole.

2. A graphene terahertz power meter according to claim 1, characterized in that: The bottom heat sink (1) is made of aluminum oxide with a thermal conductivity of 30 W / (m·K). The rectangular parallelepiped has a side length of 70 mm and a height of 32 mm. The surface has an absorber groove and four inclination angles. The heat sink has four M5 threaded holes and two wire output holes.

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