Publications by authors named "Congzhen Hu"
Article Synopsis
- - This paper presents a method for accurately measuring tiny movements along two perpendicular directions using a system of two-dimensional gratings and a laser with a quadrant detector.
- - The method effectively reduces noise and interference through a two-step differential process, achieving a measurement resolution of 40 nm and accuracies of 0.29% and 0.31% along the X and Y axes, respectively.
- - Its compact design allows for easy production and setup with microfabrication techniques, making it beneficial for applications such as gyroscopes and accelerometers.
Low-frequency electronic noise is an important parameter used for the electronic and sensing applications of transistors. Here, we performed a systematic study on the low-frequency noise mechanism for both p-channel and n-channel MoTe field-effect transistors (FET) at different temperatures, finding that low-frequency noise for both p-type and n-type conduction in MoTe devices come from the variable range hopping (VRH) transport process where carrier number fluctuations (CNF) occur. This process results in the broad distribution of the waiting time of the carriers between successive hops, causing the noise to increase as the temperature decreases.
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