Three-dimensional metallic photonic crystals fabricated by soft lithography for midinfrared applications
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We present an efficient method of fabricating freestanding three-dimensional metallic photonic crystals using soft lithography. Low cost and ease of fabrication are achieved through gold sputter deposition on a freestanding woodpile polymer template. We compare experimental results to theoretical calculations for tetragonal and face-centered-tetragonal structures as a function of the number of layers. The photonic crystals behave like full metallic structures with a photonic band edge at a wavelength of 3.5μm. The rejection rates of the structures are about 10dB/layer.
The following article appeared in Applied Physics Letters 88 (2006): 181112 and may be found at http://dx.doi.org/10.1063/1.2201621.