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Proceedings Paper

Beam profile and spectral characteristic of THz wave in free space
Author(s): Guozhong Zhao; Kun Yang; Meng Wu; Lizhong Wu
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Paper Abstract

Beam profile and spectral characteristic of terahertz (THz) wave in free space are presented in this paper. The beam width of THz wave at the focus point of parabolic mirror is obtained by means of the narrow-slit measurement. By the spectroscopic imaging, we present the transverse mode distribution of THz beam on the cross-section of focus point. Our experimental results show that the centre wavelength of THz spectra has a distinguished red-shift when it is far away the centre of THz focus point. The spectral range of THz wave far from the focus point is less than that of the centre. This kind of spectral characteristic of THz wave is closely related to the diffraction effect of electromagnetic wave.

Paper Details

Date Published: 27 January 2009
PDF: 4 pages
Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 71560E (27 January 2009); doi: 10.1117/12.807561
Show Author Affiliations
Guozhong Zhao, Capital Normal Univ. (China)
Kun Yang, Capital Normal Univ. (China)
Meng Wu, Capital Normal Univ. (China)
Lizhong Wu, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 7156:
2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments

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