A simple Fourier transform spectrometer for terahertz applications |
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Authors: | Yi Jiang Ming Liang BiaoBing Jin Lin Kang WeiWei Xu Jian Chen PeiHeng Wu |
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Institution: | Research Institute of Superconducting Electronics, Nanjing University, Nanjing 210093, China |
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Abstract: | A simple Fourier transform spectrometer was designed and constructed for the measurement of detectors, sources, passive devices
and materials in the terahertz (THz) range. It can be operated at frequencies between 0.3 and 1.5 THz, using a 50-μm-thick
Mylar-film beam splitter. The spectral range can be changed by altering the thickness of the beam splitter. The highest frequency
resolution is 750 MHz. We studied the properties of heterodyne detectors including superconductor mixers and semiconductor
harmonic mixers, direct detectors including an InSb semiconductor bolometer, superconducting tunnel junctions and the Golay
cell, and sources including Gunn oscillators and a microwave source with its multipliers, as well as various materials and
passive devices including Si wafers and metal mesh filters. |
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Keywords: | Fourier transform spectrometer direct detector heterodyne detector f'flter terahertz |
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