title: Narrowband terahertz emitters using metamaterial films.
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/m(2) when operated at 400 °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.
authors.affiliation: Department of Physics, Naval Postgraduate School, 833 Dyer Rd, Monterey, California 93943, USA. fdalves@nps.edu
authors.forename: Fabio
authors.initials: F
authors.lastname: Alves
authors.forename: Brian
authors.initials: B
authors.lastname: Kearney
authors.forename: Dragoslav
authors.initials: D
authors.lastname: Grbovic
authors.forename: Gamani
authors.initials: G
authors.lastname: Karunasiri