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Low-loss high-Q optical bandstop filter based on chalcogenide glass grating structures

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4 Author(s)
Ashbach, J.A. ; Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA ; Do-Hoon Kwon ; Werner, P.L. ; Werner, D.H.

We have proposed to make use of the low-loss characteristic of chalcogenide glass material for infrared filter applications. A stop-band chalcogenide filter design based on a grating structure was presented. The study shows that by varying the grating's geometric structure, the bandwidth can be adjusted and the resonant frequency can be fine-tuned. However, high-Q characteristics can only be realized with thicker grating structures. This initial investigation indicates that a chalcogenide glass stop-band filter can achieve reflectances higher than 90% at infrared wavelengths.

Published in:

Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE

Date of Conference:

1-5 June 2009

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