CN-122028732-A - Near-field heat radiation shunt device and method

Abstract

The invention discloses a near-field heat radiation shunt device and a near-field heat radiation shunt method, relates to the technical field of micro-nano scale heat transmission, and aims to solve the problems that an existing near-field heat management scheme depends on external excitation, is complex in structure, narrow in shunt regulation and control range and low in precision. The device comprises at least three nano particles with intervals in a near field range, at least one nano particle is of an aspheric structure and can be rotationally adjusted, and the continuous adjustment of the heat flow split ratio is realized by rotationally adjusting and controlling the heat flow coupling strength among particles by utilizing the optical anisotropy of the aspheric nano particles. The invention has the advantages of no need of external excitation, simple structure, wide-range continuous and reversible regulation of the shunt ratio from approximately 0% to more than 99%, strong robustness and low manufacturing cost, and is suitable for micro-nano scale thermal management scenes such as high-density integrated circuits, all-optical computing chips and the like.

Inventors

• SHEN XUTONG
• GE WENXUAN
• FU KUAN
• JIANG MINGLONG
• SHEN TONG
• XU FENGCHUAN
• GAO LEI

Assignees

• 苏州城市学院

Dates

Publication Date

20260512

Application Date

20260410

Claims (10)

1. 1. A near field thermal radiation splitting device comprising at least three nanoparticles, at least one of the at least three nanoparticles being of a non-spherical structure having a geometric parameter ratio, at least one of the at least three nanoparticles being rotatably adjustable, a spacing between the at least three nanoparticles being in the near field range.
2. 2. The near field thermal radiation shunt device according to claim 1, wherein the material of said nanoparticles is a polar dielectric material.
3. 3. The near field thermal radiation splitting device of claim 1, wherein the at least three nanoparticles are three nanoparticles equally distributed on a circumference.
4. 4. The near field thermal radiation splitting device of claim 1, wherein the non-spherical structure is an ellipsoidal structure, the geometric parameter ratio is a ratio of a major axis to a minor axis of the ellipsoidal structure, and the ratio of the major axis to the minor axis is in a range of 1.5-5.
5. 5. The near field thermal radiation splitting device of claim 1, wherein the at least three nanoparticles are three nanoparticles having an initial optical axis orientation of XXY, YYX, or ZZY combinations, wherein an X-type orientation indicates that the long axis of an ellipsoidal nanoparticle is aligned with the X-axis, a Y-type orientation indicates that the long axis of an ellipsoidal nanoparticle is aligned with the Y-axis, and a Z-type orientation indicates that the long axis of an ellipsoidal nanoparticle is aligned with the Z-axis.
6. 6. The near field thermal radiation splitting device of claim 1, wherein the spacing between the nanoparticles is 300-3000nm.
7. 7. A near-field heat flow diversion regulation method is characterized by comprising the steps of providing a near-field heat radiation diversion device and establishing temperature difference among nano particles, wherein the near-field heat radiation diversion device comprises at least three nano particles, at least one of the at least three nano particles is of an aspheric structure, rotating the at least one aspheric nano particle, regulating and controlling heat flow coupling strength between the at least one aspheric nano particle and other nano particles, and realizing preset diversion ratio.
8. 8. The near field thermal flux shunt control method of claim 7, wherein said rotating said at least one non-spherical nanoparticle has a rotation angle in the range of 0-pi.
9. 9. The near field heat flow split control method of claim 7 wherein the temperature differential is 10-100K.
10. 10. The near field thermal flow diversion modulation method of claim 7, further comprising monitoring a transmission coefficient between the at least three nanoparticles in real time and adjusting the rotation angle based on the transmission coefficient feedback.

Description

Near-field heat radiation shunt device and method Technical Field The invention relates to the technical field of micro-nano scale heat transmission, in particular to a near-field heat radiation shunt device and method. Background In the micro-nano scale heat transmission field, near-field heat radiation is attracting attention because it can break through the traditional blackbody radiation limit and realize ultra-high heat flux density. In recent years, with the development of emerging technologies such as continuous improvement of the integration level of semiconductor chips and full-optical computation, the need for precise regulation and control of local heat flow is increasingly urgent. In a high-density integrated circuit, the heat density of the chip is continuously increased, the directional distribution of local heat flow is required to be realized to solve the problem of overheating of a core area, and in an all-optical computing chip, the difficult problem of heat management of a photoelectric conversion link is outstanding, and the heat distribution of a photon device is required to be accurately regulated and controlled to optimize the conversion efficiency. Chinese patent CN117976630a discloses a rotation-induced near-field heat flow diverter based on anisotropic nanoparticles, which comprises a transmitting source and a receiving end, wherein the transmitting source contains an anisotropic nanoparticle, the direction and the size of the heat flow are regulated by geometrically rotating the nanoparticle, and the receiving end comprises at least two nanoparticles with equal radius to realize heat flow diversion. The scheme utilizes dielectric function space anisotropy to realize heat flow manipulation, but adopts a single-emission-source particle structure, and the receiving end is spherical particles, so that the scheme has certain limitation in the aspects of the regulation range and the precision of the shunt ratio. Chinese patent CN114877741a discloses a heat flow regulating device based on near field heat radiation, which comprises a first radiator and a second radiator which are oppositely arranged, wherein the first radiator is a composite metamaterial, and is composed of a substrate and nano particles mixed and distributed in the substrate, and the second radiator is a polar material. The scheme utilizes the multi-parameter adjustable characteristic of the composite metamaterial to realize the function of the thermal diode, but the nano particles and the substrate are required to be prepared in a compounding way, the process is complex, the material component adjustment is mainly relied on instead of geometric parameter adjustment, and the adjustment flexibility is limited. The existing near field thermal management scheme depends on an external electric field, a magnetic field or a complex heterostructure, has limited control freedom degree, and is difficult to realize dynamic, passive and high-efficiency heat flow distribution. Due to the degenerate nature of resonance, the traditional spherical nano particles have poor directional selectivity, and the precise directional regulation and control of the heat flow path are difficult to realize. Under the nanoscale, how to construct a heat radiation shunt mechanism which has a simple structure, quick response, no need of external energy intervention and capability of realizing wide-range continuous adjustment becomes a key technical bottleneck which restricts the field from going to practical use. Therefore, a new technical scheme is needed, and the high-precision, wide-range, continuous and reversible distribution of near-field heat flow can be realized through a simple structural design and a simple regulation and control mode under the condition of not depending on external excitation, so that the application requirements of local temperature control of a high-density integrated circuit, thermal management of an all-optical computing chip and the like are met. Disclosure of Invention The invention aims to provide a near-field heat radiation shunt device and a near-field heat radiation shunt method, which are used for solving the problems that a near-field heat management scheme in the prior art depends on an external electric field, a magnetic field or a complex heterostructure, has limited control freedom, is difficult to realize dynamic passive high-efficiency heat flow distribution, lacks a heat radiation shunt mechanism with a simple structure and rapid response under the nanoscale and does not need external energy intervention, and the like. In order to achieve the above purpose, the invention adopts the following technical scheme: The embodiment of the invention provides a near-field thermal radiation splitting device, which comprises at least three nano particles, wherein at least one of the at least three nano particles is of a non-spherical structure, the non-spherical structure is provided with a geometric parameter ratio, a