TY  - JOUR
AU  - Timotijević, Dejan
AU  - Vasiljević, Jadranka M.
AU  - Jović-Savić, Dragana M.
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1525
AB  - We introduce numerical modeling of two different methods for the deterministic randomization of two-dimensional aperiodic photonic lattices based on Mathieu beams, optically induced in a photorefractive media. For both methods we compare light transport and localization in such lattices along the propagation, for various disorder strengths. A disorder-enhanced light transport is observed for all disorder strengths. With increasing disorder strength light transport becomes diffusive-like and with further increase of disorder strength the Anderson localization is observed. This trend is more noticeable for longer propagation distances. The influence of input lattice intensity on the localization effects is studied. The difference in light transport between two randomization methods is attributed to various levels of input lattice intensity. We observe more pronounced localization for one of the methods. Localization lengths differ along different directions, due to the crystal and lattice anisotropy. We analyze localization effects comparing uniform and on-site probe beam excitation positions and different probe beam widths.
PB  - Optical Soc Amer, Washington
T2  - Optics Express
T1  - Numerical methods for generation and characterization of disordered aperiodic photonic lattices
EP  - 7224
IS  - 5
SP  - 7210
VL  - 30
DO  - 10.1364/OE.447572
ER  - 

@article{
author = "Timotijević, Dejan and Vasiljević, Jadranka M. and Jović-Savić, Dragana M.",
year = "2022",
abstract = "We introduce numerical modeling of two different methods for the deterministic randomization of two-dimensional aperiodic photonic lattices based on Mathieu beams, optically induced in a photorefractive media. For both methods we compare light transport and localization in such lattices along the propagation, for various disorder strengths. A disorder-enhanced light transport is observed for all disorder strengths. With increasing disorder strength light transport becomes diffusive-like and with further increase of disorder strength the Anderson localization is observed. This trend is more noticeable for longer propagation distances. The influence of input lattice intensity on the localization effects is studied. The difference in light transport between two randomization methods is attributed to various levels of input lattice intensity. We observe more pronounced localization for one of the methods. Localization lengths differ along different directions, due to the crystal and lattice anisotropy. We analyze localization effects comparing uniform and on-site probe beam excitation positions and different probe beam widths.",
publisher = "Optical Soc Amer, Washington",
journal = "Optics Express",
title = "Numerical methods for generation and characterization of disordered aperiodic photonic lattices",
pages = "7224-7210",
number = "5",
volume = "30",
doi = "10.1364/OE.447572"
}

Timotijević, D., Vasiljević, J. M.,& Jović-Savić, D. M.. (2022). Numerical methods for generation and characterization of disordered aperiodic photonic lattices. in Optics Express
Optical Soc Amer, Washington., 30(5), 7210-7224.
https://doi.org/10.1364/OE.447572

Timotijević D, Vasiljević JM, Jović-Savić DM. Numerical methods for generation and characterization of disordered aperiodic photonic lattices. in Optics Express. 2022;30(5):7210-7224.
doi:10.1364/OE.447572 .

Timotijević, Dejan, Vasiljević, Jadranka M., Jović-Savić, Dragana M., "Numerical methods for generation and characterization of disordered aperiodic photonic lattices" in Optics Express, 30, no. 5 (2022):7210-7224,
https://doi.org/10.1364/OE.447572 . .

TY  - JOUR
AU  - Mojsilović, Kristina
AU  - Tadić, Nenad B.
AU  - Lačnjevac, Uroš
AU  - Stojadinović, Stevan
AU  - Vasilic, Rastko
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1452
AB  - The growth of thin oxide coatings on the aluminum substrate in water-based sodium tungstate electrolyte by plasma electrolytic oxidation (PEO) is discussed and experimentally illustrated. The growth is carried out using a distinctive ultra-low duty cycle pulsed direct current (DC) power supply. During the PEO processing elements present in micro-discharges are identified using standard optical emission spectroscopy (OES) technique. The spectral line shape analysis of the first two hydrogen Balmer lines shows the presence of two types of micro-discharges. Obtained coatings are also characterized with respect to their morphology and chemical and phase composition. It is shown that coatings are composed of Al, O, and W, featuring low roughness and porosity. Partial crystallization of the coatings resulted in identification of WO3, W3O8, and gamma-Al2O3 crystalline phases.
PB  - Elsevier Science Sa, Lausanne
T2  - Surface & Coatings Technology
T1  - Characterization of Al-W oxide coatings on aluminum formed by pulsed direct current plasma electrolytic oxidation at ultra-low duty cycles
VL  - 411
DO  - 10.1016/j.surfcoat.2021.126982
ER  - 

@article{
author = "Mojsilović, Kristina and Tadić, Nenad B. and Lačnjevac, Uroš and Stojadinović, Stevan and Vasilic, Rastko",
year = "2021",
abstract = "The growth of thin oxide coatings on the aluminum substrate in water-based sodium tungstate electrolyte by plasma electrolytic oxidation (PEO) is discussed and experimentally illustrated. The growth is carried out using a distinctive ultra-low duty cycle pulsed direct current (DC) power supply. During the PEO processing elements present in micro-discharges are identified using standard optical emission spectroscopy (OES) technique. The spectral line shape analysis of the first two hydrogen Balmer lines shows the presence of two types of micro-discharges. Obtained coatings are also characterized with respect to their morphology and chemical and phase composition. It is shown that coatings are composed of Al, O, and W, featuring low roughness and porosity. Partial crystallization of the coatings resulted in identification of WO3, W3O8, and gamma-Al2O3 crystalline phases.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Surface & Coatings Technology",
title = "Characterization of Al-W oxide coatings on aluminum formed by pulsed direct current plasma electrolytic oxidation at ultra-low duty cycles",
volume = "411",
doi = "10.1016/j.surfcoat.2021.126982"
}

Mojsilović, K., Tadić, N. B., Lačnjevac, U., Stojadinović, S.,& Vasilic, R.. (2021). Characterization of Al-W oxide coatings on aluminum formed by pulsed direct current plasma electrolytic oxidation at ultra-low duty cycles. in Surface & Coatings Technology
Elsevier Science Sa, Lausanne., 411.
https://doi.org/10.1016/j.surfcoat.2021.126982

Mojsilović K, Tadić NB, Lačnjevac U, Stojadinović S, Vasilic R. Characterization of Al-W oxide coatings on aluminum formed by pulsed direct current plasma electrolytic oxidation at ultra-low duty cycles. in Surface & Coatings Technology. 2021;411.
doi:10.1016/j.surfcoat.2021.126982 .

Mojsilović, Kristina, Tadić, Nenad B., Lačnjevac, Uroš, Stojadinović, Stevan, Vasilic, Rastko, "Characterization of Al-W oxide coatings on aluminum formed by pulsed direct current plasma electrolytic oxidation at ultra-low duty cycles" in Surface & Coatings Technology, 411 (2021),
https://doi.org/10.1016/j.surfcoat.2021.126982 . .