标题： 表面等离极化激元在Ag2Se量子点复合聚合物薄膜中的热传导和热开关性能 显示英文标题

标题： Heat Conduction and Thermal Switching Performance of Surface Plasmon Polaritons in Ag2Se Quantum Dot Composite Polymer Film

摘要： 为稳定设备的工作温度，通常需要一个固态热电阻，它可以根据温度连续调整其导热性。 在本研究中，对填充有Ag2Se量子点（QDs）的聚合物薄膜中表面等离激元极化子的热导率和热开关性能进行了理论分析，并推导出一个理论模型，以揭示热导率与复合薄膜温度和结构的依赖关系，该模型通过数值计算验证是有效的。 结果表明，在薄层极限下，热导率将按照 ~t-3exp({\zeta }/Td ) 规则下降，其中t、d和T分别表示薄膜厚度、QDs直径和温度，{\zeta }是一个常数。 由于需要避免表面等离激元极化子（SPPs）的边界散射，只有在尺寸大于毫米尺度的器件中才能实现高热导率。 在毫米尺度下，通过将温度从300 K升高到400 K，热导率可以降低100倍，这表明在各种固态热电阻中都具有非常高的热开关比。 这项研究为通过调整结构设计热电阻和理解薄膜中的热传导提供了新的见解。 显示英文摘要

摘要： To stabilize the working temperature of an equipment, a solid-state thermal resistor is usually a requisite, which could adjust its heat conductance continuously according to the temperature. In this work, the thermal conductivity and the thermal switching performances of surface plasmon polaritons in the polymer films filled with Ag2Se quantum dots (QDs) were theoretically analyzed, and a theoretical model was also derived to reveal the dependence of the thermal conductivity on the temperature and the structure of a composite film, which is verified to be effective by numerical calculations. It shows that the thermal conductivity will decrease following ~t-3exp({\zeta}/Td) rule under the thin film limit, here t, d and T are film thickness, diameter of QDs and temperature, respectively, and {\zeta} is a constant. A high thermal conductivity could be only realized at a device with a size lager than millimeter scale, due to the need of avoiding boundary scatterings of surface plasmon polaritons (SPPs). At the millimeter scale, the thermal conductivity could be reduced by 100 times by increasing temperature from 300 to 400 K, which suggests a very high thermal switching ratio almost in all kinds of solid-state thermal resistor. This study brings new insights in designing thermal resistor and understanding heat conduction in films by adjusting its structures.