Direct laser interference patterning of ophthalmic polydimethylsiloxane (PDMS) polymers
| Autor: | D. Sola, María Jesús Clemente, Alodia Orera, Cristian Lavieja |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España), Universidad de Murcia |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
genetic structures Scanning electron microscope Laser materials processing 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound symbols.namesake law Surface structuring Electrical and Electronic Engineering Spectroscopy Diffraction grating chemistry.chemical_classification Polydimethylsiloxane business.industry Mechanical Engineering Polymer 021001 nanoscience & nanotechnology Laser Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Diffraction gratings symbols Optoelectronics sense organs 0210 nano-technology Raman spectroscopy business Refractive index |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0143-8166 |
| Popis: | The inscription of diffractive elements in ophthalmic polymers and ocular tissues to induce refractive index changes is of great interest in the fields of Optics and Ophthalmology. In this work fabrication of linear periodic patterns in polydimethylsiloxane (PDMS) intraocular lenses by means of the direct laser interference patterning (DLIP) technique was studied. A Q-Switch Nd:YAG laser coupled to second and third harmonic modules emitting linearly polarized 4 ns pulses at 355 nm with 20 Hz repetition rate was used as the laser source. Laser processing parameters were modified to produce the linear patterns. Processed samples were characterized by means of optical confocal microscopy, Scanning Electron Microscopy SEM, Energy Dispersive X-ray Spectroscopy EDX, Attenuated Total Reflectance-Infrared Spectroscopy ATR-FTIR, and Raman Spectroscopy. Depending on the laser parameters both photo-thermal and photo-chemical damage were observed in the DLIP irradiated areas. Finally, diffractive techniques were used to characterize the diffraction gratings inscribed in the samples resulting in a refractive index change of 1.9 × 10−2 under illumination of a 632.8 nm He-Ne laser. Dr. Daniel Sola thanks the Ministry of Economy and Competitiveness of the State General Administration under the project MINECO FIS2013-41237-R and the PIT2 program of the University of Murcia´s own research plan for the financial support of his contract. |
| Databáze: | OpenAIRE |
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