Optical properties of volume gratings with nanosphere-filled layers - biomimetics of moth structures
| Autor: | Dejan Stojanović, Svetlana Savić-Šević, Srećko Ćurčić, Dejan Pantelić, Branislav Salatić, B. M. Jelenković |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Scattering Doping Holography Pullulan 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Light scattering law.invention 010309 optics chemistry.chemical_compound Optics chemistry law 0103 physical sciences Optoelectronics Photonics 0210 nano-technology business Absorption (electromagnetic radiation) Local field |
| Zdroj: | ICTON |
| DOI: | 10.1109/icton.2017.8024863 |
| Popis: | A new type of layered photonic structure, whose alternating layers are filled with randomly dispersed nano-spheres, is fabricated and its optical properties are experimentally and theoretically analysed. Structures are made on a pullulan doped with chromium ions (dichromated pullulan - DCP) using holography. We found that experimental structures are similar to those observed on wings of the Diachrysia chrysitis moth, having layers of overlapping scales. DCP photonic structure has alternating air-pullulan layers, held in place by sparsely separated nano-pillars, and air voids filled with 30 – 60 nm diameter nanospheres which act as scatterers. Theoretical analysis of such structures shows that the scattering and interference interact to enhance the local field within the layers and increase the residual absorption of the material. We compare optical properties of moth scales with properties of structures fabricated in DCP, and calculated from the functional model. |
| Databáze: | OpenAIRE |
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