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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 32 — Nov. 10, 2008
  • pp: 6064–6069

Metal mesh resonant filters for terahertz frequencies

Arline M. Melo, Mariano A. Kornberg, Pierre Kaufmann, Maria H. Piazzetta, Emílio C. Bortolucci, Maria B. Zakia, Otto H. Bauer, Albrecht Poglitsch, and Alexandre M. P. Alves da Silva  »View Author Affiliations

Applied Optics, Vol. 47, Issue 32, pp. 6064-6069 (2008)

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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

OCIS Codes
(120.2440) Instrumentation, measurement, and metrology : Filters
(220.0220) Optical design and fabrication : Optical design and fabrication

ToC Category:
Optical Design and Fabrication

Original Manuscript: July 1, 2008
Revised Manuscript: September 18, 2008
Manuscript Accepted: September 19, 2008
Published: November 6, 2008

Arline M. Melo, Mariano A. Kornberg, Pierre Kaufmann, Maria H. Piazzetta, Emílio C. Bortolucci, Maria B. Zakia, Otto H. Bauer, Albrecht Poglitsch, and Alexandre M. P. Alves da Silva, "Metal mesh resonant filters for terahertz frequencies," Appl. Opt. 47, 6064-6069 (2008)

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