The miniaturization of spectrometer opens a new application area with real-time and on-site measurements.The Fourier transform spectrometer(FTS)is much attractive considering its particular advantages among the approa...The miniaturization of spectrometer opens a new application area with real-time and on-site measurements.The Fourier transform spectrometer(FTS)is much attractive considering its particular advantages among the approaches.This paper reviews the current status of micro FTS in worldwide and describes its developments;In addition,analyzed are the key problems in designing and fabricating FTS to be settled during the miniaturization.Finally,a novel model of micro FTS with no moving parts is proposed and analyzed,which may provide new concepts for the design of spectrometers.展开更多
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...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.展开更多
基金National Natural Science Fundation of China(60578036)
文摘The miniaturization of spectrometer opens a new application area with real-time and on-site measurements.The Fourier transform spectrometer(FTS)is much attractive considering its particular advantages among the approaches.This paper reviews the current status of micro FTS in worldwide and describes its developments;In addition,analyzed are the key problems in designing and fabricating FTS to be settled during the miniaturization.Finally,a novel model of micro FTS with no moving parts is proposed and analyzed,which may provide new concepts for the design of spectrometers.
基金supported by the National Basic Research Program of China (2007CB310404 and 2011CBA00107)the National Natural Science Foundation of China (11173015)the Doctoral Funds of the Ministry of Education of China (20090091110039)
文摘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.
