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1、第6讲:太赫兹波,邢歧荣,光电子技术精品课程,1.What is THz radiation An example of THz system3.Application,THz RADIATION WAVE,光电子技术精品课程,1THz=1012Hz,radiation in the terahertz range,looselydefined as o.1-10THz,spans the relatively undevelopedgap between electronics,on the low end of the spectrum,and optics on the high fre
2、quency end.,ELECTROMAGNETIC WAVE,光电子技术精品课程,光电子技术精品课程,THz time-domain spectroscopy system based on the optical rectification pumped by femtosecond lasers,光电子技术精品课程,THz signal of bacillus subtilis in time domain(left)and Fourier transform(right),Time-domain Spectrum,光电子技术精品课程,Time-Resolved THz Spectro
3、scopy,Optical Phonon Dynamics of GaAs,光电子技术精品课程,Imaging,光电子技术精品课程,Character of THz,Frequency:0.110 THz Coherent radiation with very low power Gated detection:insensitive to thermal background;very high sensitivity with dynamic range up to 106 in E-field E-field measurement:amplitude and phase non-destructive to living tissue,
