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Type: Artigo de periódico
Title: Metal mesh resonant filters or terahertz frequencies
Author: Melo, AM
Kornberg, MA
Kaufmann, P
Piazzetta, MH
Bortolucci, EC
Zakia, MB
Bauer, OH
Poglitsch, A
da Silva, AMPA
Abstract: 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 3THz. (c) 2008 Optical Society of America
Country: EUA
Editor: Optical Soc Amer
Citation: Applied Optics. Optical Soc Amer, v. 47, n. 32, n. 6064, n. 6069, 2008.
Rights: aberto
Identifier DOI: 10.1364/AO.47.006064
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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