Narrowband terahertz emitters using metamaterial films

被引：61
作者：
Alves, Fabio [1 ]
Kearney, Brian [1 ]
Grbovic, Dragoslav [1 ]
Karunasiri, Gamani [1 ]
机构：
[1] USN, Dept Phys, Postgrad Sch, Monterey, CA 93943 USA
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 19期
关键词：
QUANTUM CASCADE LASER; OPTICAL-CONSTANTS; TIME; ABSORBER;
D O I：
10.1364/OE.20.021025
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this article we report on metamaterial- based narrowband thermal terahertz (THz) emitters with a bandwidth of about 1 THz. Single band emitters designed to radiate in the 4 to 8 THz range were found to emit as high as 36 W/m(2) when operated at 400 degrees C. Emission into two well-separated THz bands was also demonstrated by using metamaterial structures featuring more complex unit cells. Imaging of heated emitters using a microbolometer camera fitted with THz optics clearly showed the expected higher emissivity from the metamaterial structure compared to low-emissivity of the surrounding aluminum. (C) 2012 Optical Society of America
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页码：21025 / 21032
页数：8
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