Infrared filters using metallic photonic band gap structures on flexible substrates
作者:
Sandhya Gupta,
Gary Tuttle,
Mihail Sigalas,
Kai-Ming Ho,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 17
页码: 2412-2414
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.120077
出版商: AIP
数据来源: AIP
摘要:
Metallic photonic band gap (MPBG) filter structures operating at far infrared wavelengths have been designed, fabricated, and characterized. The MPBGs are multilayer metallic meshes imbedded in a flexible polyimide dielectric. Depending on the periodic pattern of the metal grids, the filters have either simple high-pass or more complex transmission characteristics. The critical frequencies of the filters depend on the spatial periodicity of the metal grids and the interlayer separation. Optical transmission measurements on a high-pass structure show cutoff frequency of 3 THz and attenuation of more than 35 dB in the cutoff region, in good agreement with predicted results. Band-reject filters show similarly good attenuation and large fractional bandwidths. The filters maintain their optical characteristics after repeated bending, demonstrating mechanical robustness of the MPBG structure. ©1997 American Institute of Physics.
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