Metal mesh resonant filters for terahertz frequencies

Melo A.M.; Kornberg M.A.; Kaufmann P.; Piazzetta M.H.; Bortolucci E.C.; Zakia M.B.; Bauer O.H.; Poglitsch A.; Da Silva A.M.P.A.

Metal mesh resonant filters for terahertz frequencies

Tipo

Artigo

Data de publicação

2008

Periódico

Applied Optics

Citações (Scopus)

89

Autores

Melo A.M.
Kornberg M.A.
Kaufmann P.
Piazzetta M.H.
Bortolucci E.C.
Zakia M.B.
Bauer O.H.
Poglitsch A.
Da Silva A.M.P.A.

Resumo

The interest in terahertz photometric and imaging measurements has motivated the development of bandpass resonant filters to be coupled to multiple-pixel devices such as bolometer arrays. Resonant grids are relatively simple to fabricate, exhibiting high transmission at the central frequency, a narrow bandpass, and good rejection of the side frequencies of the spectrum. We have fabricated filters centered at different frequencies between 0.4 and 10 THz, using photolithography and electroforming techniques. Transmission measurements have shown center frequencies and bandwidths close to the design predictions. The performance of the filters was found not to be critically dependent on small physical deformations in the mesh, becoming more noticeable at higher frequencies (i.e., for smaller physical sizes). Wider bandwidths, needed to attain higher sensitivities in the continuum, were obtained by changing the design parameters for filters at 2 and 3 THz. © 2008 Optical Society of America.

Assuntos Scopus

Design parameters , Different frequency , High transmission , Higher frequencies , Imaging measurements , Physical deformation , Terahertz frequencies , Transmission measurements