19 October 2016 Extinction characteristic of graphite smoke for terahertz wave
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Proceedings Volume 10155, Optical Measurement Technology and Instrumentation; 101553I (2016) https://doi.org/10.1117/12.2247383
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
Graphite with good extinction performance can be used as electro-optical passive jamming material for infrared and laser detection. In order to acquire the extinction characteristic of graphite smoke for terahertz wave (THz wave), graphite powder was dispersed in a KBr matrix with concentrations of 0.6 wt% and 1.0 wt% respectively, and those composites were processed in the stoving system and were then pressed into pellets. Meanwhile, the pure KBr powder pellet was prepared with same method under same condition. By utilizing THz-TDS, the THz transmission spectrums of those samples were measured in the frequency range 0.2-1.1 THz. Then, the absorption coefficients of those samples were deduced based on the material parameter estimation method. The experimental results indicate that the absorption coefficients of those samples are enhanced with the increasing THz frequency and that of them are improved with the concentrations of graphite at the same frequency. The results obtained demonstrate that THz wave has strong penetration capacity through graphite smoke and THz radar will be promising for use to make up for the deficiency of the infrared and laser detection system and to detect the targets coated with graphite smoke.
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Qi-chao Wang, Jia-chun Wang, Da-peng Zhao, Ji-kui Zhang, Hao Liu, Jia-ming Shi, "Extinction characteristic of graphite smoke for terahertz wave", Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101553I (19 October 2016); doi: 10.1117/12.2247383; https://doi.org/10.1117/12.2247383
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