Fabrication of Guided-Mode Resonance Elements by Nanoimprint Lithography
This paper addresses utilization of nanoimprint lithography for fabrication of nanopatterned resonant photonic elements. These compact periodic films resonate sharply when illuminated with light. The attendant spectral and angular signatures are useful in design of photonic devices for various applications. It is of interest to design and optimize resonant leaky-mode elements with prescribed filtering, polarization, and security attributes. Applying nanoimprint lithography techniques, we fabricate prototype devices using polymer materials produced by Dymax Corporation. The initial prototypes are designed for use in the near-IR and telecommunications spectral regions. We apply holographic surface-relief gratings as master templates. With these templates, we have formed submasters in PDMS (polydimethylsiloxane) to function as imprint stamps for the soft lithography steps. Using these submasters, we fabricate periodic surfaces in UV-curable polymers with resonant films deposited on the surface by sputtering. Several example devices possessing resonance efficiencies exceeding 90% are presented along with their spectral and angular characteristics.
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Document Type: Research Article
Publication date: 2010-03-01
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