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Applied Optics

Applied Optics


  • Vol. 35, Iss. 31 — Nov. 1, 1996
  • pp: 6210–6215

Cross-shaped bandpass filters for the near- and mid-infrared wavelength regions

K. D. Möller, J. B. Warren, J. B. Heaney, and C. Kotecki  »View Author Affiliations

Applied Optics, Vol. 35, Issue 31, pp. 6210-6215 (1996)

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A photolithographic process has been used to form cross-shaped patterns in 3-μm-thick nickel foils. Patterns with cross arm dimensions in the 10–20-μm range, and with periodicities in the 16–26-μm range, yield self-resonant bandpass filters for wavelengths in the 20–25-μm region. Transmittances as high as 80% were achieved with center wavelength-to-bandwidth ratios (λ R /Δλ) of ∼5. We present a simple empirical formula that relates the wavelength of peak transmittance, or resonant frequency, with cross dimensions and periodicity.

© 1996 Optical Society of America

Original Manuscript: October 5, 1995
Revised Manuscript: February 29, 1996
Published: November 1, 1996

K. D. Möller, J. B. Warren, J. B. Heaney, and C. Kotecki, "Cross-shaped bandpass filters for the near- and mid-infrared wavelength regions," Appl. Opt. 35, 6210-6215 (1996)

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