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Terahertz frequency domain spectrometer with a single photoconductive element for terahertz signal generation and detection
Terahertz frequency domain spectrometer with a single photoconductive element for terahertz signal generation and detection
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机译:具有单个光电导元件的太赫兹频域光谱仪,用于太赫兹信号的生成和检测
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摘要
There is described an apparatus for analyzing, identifying or imaging a target. The apparatus comprises a laser system which generates first and second laser beams having respective different frequencies, and directs the first and second laser beams along an optical path to a photoconductive material. An antenna structure is formed on the photoconductive material, the antenna structure comprises a first antenna for emitting electromagnetic radiation having a frequency dependent on the difference between said respective different frequencies of the first and second laser beams and a second antenna for generating a detection signal. A processor processes the detection signal to analyze, identify or image the target. The laser system is arranged such that the first and second laser beams overlap in a region of a surface of the photoconductive material having at least part of the first and second antennas formed thereon.
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