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Influence of interdiffusion on multilayered gradient refractive index (GRIN) lens materials
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lai, Chuan-Yar Ponting, Michael Baer, Eric |
| Copyright Year | 2012 |
| Abstract | Abstract The interdiffusion of two materials used to fabricate polymeric gradient refractive index (GRIN) lenses was examined by varying contact time during multilayer films co-extrusion composed of alternating poly(methylmethacrylate) (PMMA) and poly(styrene-co-acrylonitrile) with 17 mol% acrylonitrile (SAN17). The model applied successfully described their interdiffusion, and a reasonable mutual diffusion coefficient of 7.0 × 10 −13 m 2 /s was determined. Atomic force microscopy confirmed good agreement between modeled profiles and actual layer structure, and optical properties were investigated. Films with contact times of ≤160 s exhibited multiple refractive indices, while films with longer contact times, showed single refractive indices that followed an additive line. Though a single additive value requires layers ≤ a quarter-wavelength of light, these films exhibit such behavior with thicknesses 5× greater than expected, though layer resolution is still present. Using the model profiles, it was determined that only a 1% reduction in material purity is required to reduce the effective layer thickness. |
| Starting Page | 1393 |
| Ending Page | 1403 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.polymer.2012.01.036 |
| Volume Number | 53 |
| Alternate Webpage(s) | http://www.stc-clips.org/wp-content/uploads/2012/01/1-s2.0-S0032386112000638-main.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.polymer.2012.01.036 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
