Resonant photo-thermal conversion for sub-terahertz imaging

被引：3
|
作者：
Jolly, Alain [1 ,2 ]
Chassagne, Bruno [1 ]
Jolly, Jean-Claude [3 ]
机构：
[1] ALPhANOV, Cours Liberat 351, F-33403 Talence, France
[2] CEA, Ctr Etudes Sci & Tech Aquitaine, F-33114 Le Barp, France
[3] Univ Angers, ISTIA, F-49000 Angers, France
来源：
OPTICS COMMUNICATIONS | 2014年 / 311卷
关键词：
Terahertz imaging; Photo-thermal conversion; Quarter-wave resonance; REAL-TIME;
D O I：
10.1016/j.optcom.2013.08.077
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An original design of generic interest is proposed for fast imaging, in the field of sub-terahertz frequencies, by means of resonant coupling between an ultra-thin photo-thermal converter and a metallic grid upstream an infrared camera. The material is a sheet of polyimide material with a high content of absorptive carbon inclusions. We make use of the large difference between the IR and THz wavelengths in a quarter-wave planar geometry, to ensure a highly efficient and stable conversion process. A complete setup has been implemented for demonstration purposes, using the beam from a Gunn diode at 110 GHz. Experimental results are in good agreement with the predictions from the numerical model, which helps to validate the concept and the requirements for geometrical adjustment. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：325 / 331
页数：7
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