科技报告详细信息
Terahertz detectors for long wavelength multi-spectral imaging. | |
Lyo, Sungkwun Kenneth ; Wanke, Michael Clement ; Reno, John Louis ; Shaner, Eric Arthur ; Grine, Albert D. | |
关键词: FIELD EFFECT TRANSISTORS; PLASMONS; SENSITIVITY; SPECTROSCOPY; WAVELENGTHS Spectral analysis-Instruments; Spectrometer.; Plasmons (Physics); Spectroscopy.; Spectral data.; | |
DOI : 10.2172/921735 RP-ID : SAND2007-6354 PID : OSTI ID: 921735 Others : TRN: US0802157 |
|
学科分类:物理(综合) | |
美国|英语 | |
来源: SciTech Connect | |
![]() |
【 摘 要 】
The purpose of this work was to develop a wavelength tunable detector for Terahertz spectroscopy and imaging. Our approach was to utilize plasmons in the channel of a specially designed field-effect transistor called the grating-gate detector. Grating-gate detectors exhibit narrow-linewidth, broad spectral tunability through application of a gate bias, and no angular dependence in their photoresponse. As such, if suitable sensitivity can be attained, they are viable candidates for Terahertz multi-spectral focal plane arrays. When this work began, grating-gate gate detectors, while having many promising characteristics, had a noise-equivalent power (NEP) of only 10{sup -5} W/{radical}Hz. Over the duration of this project, we have obtained a true NEP of 10{sup -8} W/{radical}Hz and a scaled NEP of 10{sup -9}W/{radical}Hz. The ultimate goal for these detectors is to reach a NEP in the 10{sup -9{yields}-10}W/{radical}Hz range; we have not yet seen a roadblock to continued improvement.【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO201705190000692LZ | 1164KB | ![]() |