Naval Postgraduate School
Narrowband terahertz emitters using metamaterial films
Alves_Narrowband.pdf (1.772Mb)Abstract
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/m2 when operated at 400°. 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.
Description
Optics Express, Volume 20, No. 19, pp. 21025-21032 (10 September 2012)
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