Enhancement of Laser Damage Resistance at 1064 nm of High and Anti-Reflective Optical Multilayers by Tailoring the Electric Field Distribution and Post-Annealing

Date

2016-05-13

Author

Aydogdu, G. H.
Batman, H.
Cosar, M. B.
Ozhan, A. E. S.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

321
views

0
downloads

In this study, multilayer Ta2O5/SiO2 and HfO2/SiO2 films were deposited on glass substrates by ion beam sputtering and physical vapor deposition methods, respectively. The effect of electric field distribution and heat treatment of these oxide multilayers on laser damage resistance were investigated systematically. Optical performance was characterized by spectrophotometer. Electric field analysis and optic system design were performed by thin film design software. LIDT (laser-induced damage threshold) measurements were applied at 1064 nm to obtain laser damage values of optical coatings. Damage images were characterized by a Nomarski (with dark field type) microscope. It was observed that the LIDT value of HfO2/SiO2 anti-reflective optical films increases to 34 J/cm(2) when they are post-annealed at 350 degrees C. On the other hand, measured LIDTs as high as 26 J/cm(2) were achieved by tailoring the electric field distribution of high reflective coatings.

Subject Keywords

THRESHOLD, LAYERS

URI

https://hdl.handle.net/11511/67751

DOI

https://doi.org/10.14332/svc16.proc.0033

Conference Name

59th Annual Technical Conference of the Society-of-Vacuum-Coaters (SVC)

Collections

Unclassified, Conference / Seminar

Suggestions

OpenMETU
Core

High-quality alignment of nematic liquid crystals using periodic nanostructures created by nonlinear laser lithography Pavlov, Ihor; Dobrovolskiy, A. M.; Kadan, V. M.; Blonskiy, I. V.; Kazantseva, Z. I.; Gvozdovskyy, I. A. (2018-10-01) It is well known that today two main and well studied methods for alignment of liquid crystals has been used, namely: rubbing and photoalignment technologies, that lead to the change of anisotropic properties of aligning layers and long-range interaction of the liquid crystal molecules in a mesophase. In this manuscript, we use the nonlinear laser lithography technique, which was recently presented as a fast, relatively low-cost method for a large area micro and nanogrooves fabrication based on laser-induce...
Tuning the electron beam evaporation parameters for the production of hole and electron transport layers for perovskite solar cells Coşar, Mustafa Bura; Özenbaş, Ahmet Macit; Department of Metallurgical and Materials Engineering (2019) This study evaluates the use of electron beam evaporation technique for the deposition of electron and hole transport layers for perovskite solar cells where cell productions were performed in n-i-p structure. NiO and TiO layers were studied for hole transport layer and TiO2 and Nb2O5 layers were deposited for electron transport purposes. To optimize the suitable evaporation parameters for efficient perovskite cell production, single layers of each material were deposited at different conditions of oxygen f...
Enhancement in the high-T-c phase of BSCCO superconductors by Nb addition Sozeri, Huseyin; Ghazanfari, Nader; Ozkan, Husnu; Kilic, Ahmet (IOP Publishing, 2007-06-01) Pure and Nb2O5 added Bi1.6Pb0.4Nbx Sr2Ca2Cu3O delta superconductors ( x varies up to 0.30) were synthesized by the solid state reaction method. Structural and superconducting properties of the samples were investigated. The fraction of the high-T-c phase ( 2223) increases with Nb addition up to x = 0.10, for which a nearly single 2223 phase was obtained. The critical temperature of the samples increases from 96 to 104 K with doping up to x = 0.20 and a further increase in Nb decreases the Tc sharply. Simila...
Improvement of organoclay dispersion into polystyrene-based nanocomposites by incorporation of SBS and maleic anhydride-grafted SBS Dike, Ali Sinan; Yılmazer, Ülkü (SAGE Publications, 2020-04-01) In this study, organoclay-containing polystyrene (PS)-based nanocomposites were fabricated by extrusion in the presence of thermoplastic elastomer modifiers. Styrene-butadiene-styrene (SBS) rubber was used as the elastomeric compatibilizer and maleic anhydride (MA) was grafted onto SBS rubber at different ratios. Grafting was made via melt blending. Cloisite (R) 30B was used as the organoclay and it was added to PS and PS/SBS blends using a corotating twin-screw extruder, followed by injection molding. Clay...
Enhancement of catalytic performance of Ni based mesoporous alumina by Co incorporation in conversion of biogas to synthesis gas ARBAĞ, HÜSEYİN; YAŞYERLİ, SENA; YAŞYERLİ, NAİL; DOĞU, GÜLŞEN; Doğu, Timur (2016-12-05) Mesoporous alumina with an ordered pore structure has significant advantages as a catalyst support in terms of minimization of diffusion limitations and coke formation during reforming reactions. Conversion of biogas to synthesis gas through dry reforming of methane, was investigated over Co & Ni impregnated mono- and bi-metallic mesoporous alumina catalysts with ordered pore structures. Comparison of the results obtained with mesoporous alumina catalysts containing 5% Ni and 2.5% Ni-2.5% Co proved that inc...

Citation Formats

G. H. Aydogdu, H. Batman, M. B. Cosar, and A. E. S. Ozhan, “Enhancement of Laser Damage Resistance at 1064 nm of High and Anti-Reflective Optical Multilayers by Tailoring the Electric Field Distribution and Post-Annealing,” Indianapolis, IN, 2016, p. 247, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67751.