SGER: Exploring the Capability of Quasi-One Dimensional Conductors for Microwave Detection

这项为期一年的探索性研究小额赠款的目标是探索开发一种新型微波探测器的可能性，基于像TaS3和K0.3Mo03这样的准一维导体，它在附近表现出金属到半导体的转变200K。在低温阶段，由于电荷密度波的形成，化合物在低电场下具有非线性电学响应。最近，人们发现这些化合物在液氦温度附近出现了一种新型的非线性。差动电阻的变化是非常突然和巨大的，而且它似乎为低强度电磁波提供了良好的混频特性。首席调查人员将尝试利用电学响应的尖锐非线性来检测10 GHz频率范围内的微波信号100 GHz。他们将探索化合物在直流和微波复合电场存在下的性质。如果微波探测证明是可行的，他们将把这些化合物的特性与现有的微波探测器进行比较。

The goal of this one year Small Grant for Exploratory Research is to explore the possibility of developing a novel type of microwave detector, based on quasi-one-dimensional conductors like TaS3 and K0.3Mo03 which exhibits metal to semiconductor transition around 200K. In the low temperature phase the compounds have nonlinear electrical response at low electric fields due to formation of charge density waves. Recently, it has been discovered that a novel type of non-linearity appears in these compounds around liquid helium temperatures. The change in the differential resistance is very abrupt and large, and it would appear to offer excellent mixing characteristics for low intensity electromagnetic waves. The principal investigators will attempt to use the sharp nonlinearity of the electrical response for the detection of microwave signals in the frequency range of 10GHz to 100GHz. They will explore the properties of the compounds in the presence of combined DC and microwave electric fields. If microwave detection proves to be feasible, they will compare the characteristics of these compounds to that of established microwave detectors.