Abstract

Arrays of both annular and square annular slots in a conducting sheet on a dielectric substrate have been fabricated photolithographically. The structures are shown to behave as bandpass filters in the far infrared, with a resonant wavelength slightly larger than the average circumference or perimeter of the slot. The measured far-infrared transmittance of the annular array is approximately 76% of that predicted by theory, while its resonant frequency agrees with theory to within 5%.

© 1989 Optical Society of America

Resonant array bandpass filters for the far infrared

S. T. Chase and R. D. Joseph
Appl. Opt. 22(11) 1775-1779 (1983)

Far-infrared dichroic bandpass filters

D. D. Nolte, A. E. Lange, and P. L. Richards
Appl. Opt. 24(10) 1541-1545 (1985)

Resonant metal-mesh bandpass filters for the far infrared

D. W. Porterfield, J. L. Hesler, R. Densing, E. R. Mueller, T. W. Crowe, and R. M. Weikle
Appl. Opt. 33(25) 6046-6052 (1994)

Far Infrared Bandpass Filters and Measurements on a Reciprocal Grid

G. M. Ressler and K. D. Möller
Appl. Opt. 6(5) 893-896 (1967)

Far-infrared bandpass filters from perforated metal screens

P. G. Huggard, M. Meyringer, A. Schilz, K. Goller, and W. Prettl
Appl. Opt. 33(1) 39-41 (1994)