阅读说明：本技术 一种电控可变逻辑功能器件及操作方法 (Electrically controlled variable logic function device and operation method ) 是由 郭健平 许捷凯 丁力 韦中超 于 2020-07-03 设计创作，主要内容包括：本发明公开了一种基于石墨烯对阵列结构的电控可变逻辑功能器件及操作方法,该功能器件包括非金属衬底；所述非金属衬底的表面沉积具有有序排列的单层石墨烯结构；所述单层石墨烯结构可以分成两个部分：第一部分由沿Y方向排列的两条相同的平行石墨烯纳米线组成,它们具有固定的化学势能；第二部分由沿X方向排列的两条相同的平行石墨烯纳米线组成,其化学势能由外部电压控制。信号光是由Z方向向下入射。将X方向横向排列的两条石墨烯纳米线的电压作为逻辑门的输入端口,Z方向入射的信号光作为输出信号可构成电控可变、光电混合式逻辑功能器件。本逻辑门具有结构简单、控制方便等特点,在设备检测、物联网等多个应用领域具有较好的应用前景。(The invention discloses an electric control variable logic function device based on a graphene pair array structure and an operation method, wherein the function device comprises a non-metal substrate; depositing a single-layer graphene structure with ordered arrangement on the surface of the nonmetal substrate; the single layer graphene structure can be divided into two parts: the first part consists of two identical parallel graphene nanowires arranged along the Y direction, and the two identical parallel graphene nanowires have fixed chemical potential energy; the second part consists of two identical parallel graphene nanowires arranged along the X direction, and the chemical potential energy of the second part is controlled by external voltage. The signal light is incident downward from the Z direction. The voltage of two graphene nanowires transversely arranged in the X direction is used as an input port of a logic gate, and signal light incident in the Z direction is used as an output signal to form an electric-control variable and photoelectric mixed logic function device. The logic gate has the characteristics of simple structure, convenience in control and the like, and has a good application prospect in multiple application fields such as equipment detection, Internet of things and the like.)

1. An electrically controlled variable logic function device based on a graphene pair array structure is characterized by comprising a non-metal substrate; the surface of the non-metal substrate is deposited with a single-layer graphene structure with an ordered arrangement, and the single-layer graphene structure is divided into two parts: the first part is two identical parallel graphene nanowires arranged along the Y direction, and the two identical parallel graphene nanowires have fixed chemical potential energy; the second part is two identical parallel graphene nanowires arranged along the X direction, and the chemical potential energy of the nanowires is adjustable and controlled by external voltage; the input signal of the logic gate is the voltage of two graphene nanowires arranged in the X direction, and the output signal is signal light incident in the Z direction.

2. The electrically controlled variable logic function device based on a graphene pair array structure according to claim 1, wherein the non-metallic substrate is a quartz substrate.

3. The electrically controlled variable logic function device based on a graphene pair array structure according to claim 1, wherein the signal light input end is an upper surface of the electrically controlled variable logic function device based on a graphene pair array structure, and the signal light output end is a lower surface of the electrically controlled variable logic function device based on a graphene pair array structure.

4. An electrically controlled variable logic function device based on graphene pair array structure according to claim 1, wherein the non-metallic substrate has a lateral width of 1.2 μm to 1.8 μm, a longitudinal width of 0.8 μm to 1.2 μm and a thickness of 150nm to 250 nm.

5. The electrically controlled variable logic function device based on graphene pair array structure of claim 1, wherein the graphene nanowires have only a single layer structure and have identical structural parameters, and the length of the graphene nanowires is 500nm to 700nm, and the width of the graphene nanowires is 80nm to 120 nm.

6. The electrically controlled variable logic function device based on a graphene pair array structure according to claim 1, wherein the distance between two identical parallel symmetrical single-layer graphene nanowires arranged in the Y direction is 700nm to 900 nm.

7. The electrically controlled variable logic function device based on a graphene pair array structure according to claim 1, wherein the distance between two identical parallel symmetrical single-layer graphene nanowires arranged in the X direction is 70nm to 120 nm.

8. The electrically controlled variable logic function device based on a graphene pair array structure according to claim 1, wherein one single-layer graphene nanowire of the two single-layer graphene nanowires arranged in the X direction is located at a central position of the electrically controlled variable logic function device.

9. An operation method of an electric control variable logic function device based on a graphene pair array structure is characterized by comprising the following steps:

selecting monochromatic light with different wavelengths as input signal light;

changing the chemical potential energy of the graphene nanowire at the input end by applying voltage, and determining an input binary state value by taking the chemical potential energy as a basis;

sequentially determining the input state of the input port by using the graphene nanoribbons as the input port;

at the lower surface of the device, the output binary state is determined according to the transmittance.

10. The method of claim 9, wherein switching between different logic operations is performed by changing the voltage applied to the two graphene nanowires aligned in the X direction.

Technical Field

The invention relates to the technical field of photonic chips, in particular to an electric control variable logic function device based on a graphene pair array structure and an operation method.

Background

For many years, electronic devices have been affected by their inherent characteristics such as delay and current thermal effect, and have certain performance defects. Compared with electronic calculation, optical calculation has the advantages of super high speed, ultra wide band information processing, high integration and the like. Optical computing and processing have long been recognized as an important way to overcome the fundamental performance limitations of electronic devices.

In recent years, graphene is considered as a revolutionary material in the future, and has excellent optical and electrical properties, so that the graphene shows important application prospects in the aspects of materials science, micro-nano processing and the like.

Electromagnetically Induced Transparency (EIT) causes the medium to create one or more transparent windows in the absorption spectrum of the medium by destructive interference of light at resonance, rendering the turbid medium transparent at resonance.

Recently, optical logic gate devices of nanometer scale have attracted considerable attention due to their important applications in the fields of optical computing systems and optical interconnection networks. Many optical logic gates based on photonic microstructures and plasmonic nanostructures have emerged, such as photonic crystals, micro-ring resonators, graphene oxide films, photonic and plasmonic nanowires and semiconductor optical amplifiers.

According to the introduction, the electric control variable logic function device based on the graphene pair array structure and the operation method have the advantages of simplicity in operation, small size, high efficiency, simple structure, diversified functions and the like.

Disclosure of Invention

In view of the above, the present invention discloses an electrically controlled variable logic function device based on a graphene pair array structure and an operation method thereof, which flexibly control the change of chemical potential energy of graphene through voltage regulation and control, skillfully apply an EIT-like effect, and implement different logic methods. Meanwhile, the device has the characteristics of simple structure, miniaturization, compactness and good stability.

In order to achieve the above object, the present invention provides the following technical means:

on one hand, the invention provides an electric control variable logic function device based on a graphene pair array structure, which comprises a non-metal substrate; the surface of the non-metal substrate is deposited with a single-layer graphene structure with an ordered arrangement, and the single-layer graphene structure is divided into two parts: the first part is two identical parallel graphene nanowires arranged along the Y direction, and the two identical parallel graphene nanowires have fixed chemical potential energy; the second part is two identical parallel graphene nanowires arranged along the X direction, and the chemical potential energy of the nanowires is adjustable and controlled by external voltage; the input signal of the logic gate is the voltage of two graphene nanowires arranged in the X direction, and the output signal is signal light incident in the Z direction.

Preferably, the non-metal substrate is a quartz substrate.

Preferably, the signal light input end is the upper surface of the electrically controlled variable logic function device based on the graphene pair array structure, and the signal light output end is the lower surface of the electrically controlled variable logic function device based on the graphene pair array structure.

Preferably, the non-metallic substrate has a lateral width of 1.2 μm to 1.8 μm, a longitudinal width of 0.8 μm to 1.2 μm, and a thickness of 150nm to 250 nm.

Preferably, the graphene nanowires have only a single-layer structure and have the same structural parameters, and the length of the graphene nanowires is 500nm to 700nm, and the width of the graphene nanowires is 80nm to 120 nm.

Preferably, the distance between two identical parallel symmetrical single-layer graphene nanowires arranged in the Y direction is 700nm to 900 nm.

Preferably, the distance between two identical parallel symmetrical single-layer graphene nanowires arranged in the X direction is 70nm to 120 nm.

Preferably, one single-layer graphene nanowire of the two single-layer graphene nanowires arranged in the X direction is located at the central position of the electrically-controlled variable logic function device.

On the other hand, the invention provides an operation method of an electric control variable logic function device based on a graphene pair array structure, which comprises the following steps:

selecting monochromatic light with different wavelengths as input signal light;

changing the chemical potential energy of the graphene nanowire at the input end by applying voltage, and determining an input binary state value by taking the chemical potential energy as a basis;

sequentially determining the input state of the input port by using the graphene nanoribbons as the input port;

at the lower surface of the device, the output binary state is determined according to the transmittance.

Preferably, the switching between different logic operations is realized by changing the voltage applied to the two graphene nanowires arranged in the X direction.

Compared with the prior art, the invention has the beneficial effects that at least:

(1) the specification is only micro-nano scale devices, the structure is miniaturized and compact, and the integration is convenient.

(2) The chemical potential energy of the transverse parallel graphene nanowires can be selectively controlled and changed by changing the magnitude of the applied voltage, so that the switching among different modes can be achieved, and the operation is easy.

(3) Simple structure and convenient production.

(4) The method has very obvious logic output contrast, and can greatly reduce the error rate of logic operation.

(5) The integrated application of the NOT gate, the NAND gate, the logic gate A not less than B and the logic gate A not less than B on the same structure is realized, and a plurality of logic operation functions are integrated by changing the incident wavelength without adjusting the existing nano structure.

(6) Has stronger coupling resonance effect and is suitable for high-performance optical logic processing.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of an electrically controlled variable logic function device based on a graphene pair array structure in a preferred embodiment of the present invention;

FIG. 2 is a flow chart of a method of operation of an electrically controlled variable logic function device based on a graphene pair array structure;

FIG. 3 is a diagram of a specific apparatus for performing logic operations based on the present device in an embodiment of the present invention;

FIG. 4 is a diagram illustrating the transmission spectra of different binary signals input when the inverter is implemented, which can be used as the basis for determining the binary output of the logic inverter according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating the transmission spectra of different binary signals input when the NAND gate is implemented according to the embodiment of the present invention, which can be used as a basis for determining the binary output of the logic NAND gate;

FIG. 6 is a diagram illustrating the transmission spectra of different binary signals input when implementing the logic gate with A ≦ B according to an embodiment of the present invention, which can be used as a criterion for outputting the binary signal with A ≦ B;

FIG. 7 shows the transmission spectrum of different binary signals input when the logic gate A ≧ B is implemented, which can be used as the basis for determining the binary output of the logic gate A ≧ B in the embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.