Prof. Ion M. Tiginyanu Profile

Prof. Ion M. Tiginyanu

President at Academy of Sciences of Moldova

SPIE Involvement:

Author | Editor

Area of Expertise:

Metamaterials, photonic crystals , Optical phonon engineering , Metallo-dielectric periodic structures , Random lasing , Nanostructuring, porous materials , Sensors

Websites:

Company Website

Proceedings Article | 31 December 2020 Paper

Photosensivity of heterostructures produced by aerosol deposition of ZnMgO thin films on Si substrates

Vadim Morari, Eduard Monaico, Emil Rusu, Karin Leistner, Kornelius Nielsch, V. Ursaki, I. Tighineanu

Proceedings Volume 11718, 1171818 (2020) https://doi.org/10.1117/12.2571189

KEYWORDS: Magnesium, Zinc, Aerosols, Ultraviolet radiation, Thin films, Silicon, Chemical analysis, Zinc oxide, Thin film deposition

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Proceedings Article | 16 June 2017 Presentation

Flame based growth of ZnO nano- and microstructures for advanced optical, multifunctional devices, and biomedical applications (Conference Presentation)

Yogendra Mishra, Jorit Gröttrup, Daria Smazna, Iris Hölken, Mathias Hoppe, Sindushree Sindushree, Sören Kaps, Oleg Lupan, Jan Seidel, Teresa Monteiro, Ion Tiginyanu, Lorenz Kienle, Carsten Ronning, Karl Schulte, Bodo Fiedler, Rainer Adelung

Proceedings Volume 10248, 102480D (2017) https://doi.org/10.1117/12.2265704

KEYWORDS: Zinc oxide, Biomedical optics, Silicon, Carbon, 3D surface sensing, Ions, Metals, Oxides, Nanostructuring, 3D microstructuring

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The recent flame based growth strategy offers a simple and versatile fabrication of various (one, two, and three-dimensional) nano- and microstructures from different metal oxides (ZnO, SnO2, Fe2O3, etc.) in a desired manner.[1] ZnO structures ranging from nanoscales wires to macroscopic and highly porous 3D interconnected tetrapod networks have been successfully synthesized, characterized and utilized for various applications. The ZnO micro- and nanoneedles grown at walls in silicon trenches showed excellent whispering gallery mode resonances and photocatalytic properties.[2] Using the same strategy, large polycrystalline micro- and nanostructured ZnO platelets can be grown with grains interconnected together via grain boundaries and these grain boundaries exhibit a higher conductivity as compared to individual grains.[3] This flame transport synthesis (FTS) approach offers the growth of a large amount of ZnO tetrapods which have shown interesting applications because of their 3D spatial shape and micro-and nanoscale size, for example, interconnected tetrapods based devices for UV-detection and gas sensing.[4-5] Because of their complex 3D shape, ZnO tetrapods can be used as efficient filler particles for designing self-reporting,[6] and other interesting composites. The nanostructured materials exhibit an important role with respect to advanced biomedical applications as grown ZnO structures have shown strong potentials for antiviral applications.[7] Being mechanically strong and micro-and nanoscale in dimensions, these ZnO tetrapods can be easily doped with other elements or hybridized with various nanoparticles in form of hybrid ZnO tetrapods which are suitable for various multifunctional applications, for example, these hybrid tetrapods showed improved gas sensing properties.[8] The sacrificial nature of ZnO allows the for growth of new tetrapods and 3D network materials for various advanced applications, for example, highly porous and ultra light carbon based Aerographite materials[9] and hollow silicon tetrapods.[10] These carbon based highly porous network can be further utilized for growth of new hybrid 3D nanomaterials, for example, Aerographite- GaN[11] and Aerographite-ZnO[12] for advanced optical and other applications.

Proceedings Article | 30 May 2017 Presentation + Paper

Multilayer porous structures on GaN for the fabrication of Bragg reflectors

Tudor Braniste, Eduard Monaico, Denis Martin, Jean-François Carlin, Veaceslav Popa, Veaceslav Ursaki, Nicolas Grandjean, Ion Tiginyanu

Proceedings Volume 10248, 102480R (2017) https://doi.org/10.1117/12.2266280

KEYWORDS: Vapor phase epitaxy, Modulation, Semiconducting wafers, Gallium nitride, Electrochemical etching, Reflectors, Refraction, Distributed Bragg reflectors, Metalorganic chemical vapor deposition, Scanning electron microscopy, Nanolithography, Sapphire, Reflectivity

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Proceedings Article | 1 June 2015 Paper

Fabrication of photonic crystal circuits based on GaN ultrathin membranes by maskless lithography

Olesea Volciuc, Tudor Braniste, Vladimir Sergentu, Veaceslav Ursaki, Ion Tiginyanu, Jürgen Gutowski

Proceedings Volume 9519, 951904 (2015) https://doi.org/10.1117/12.2178525

KEYWORDS: Gallium nitride, Photonic crystals, Dispersion, Etching, Ion beams, Gallium, Mercury, Lamps, Electromagnetism, Temperature metrology

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Proceedings Article | 22 May 2013 Paper

Effects of morphology on the emission of photons from GaN membranes fabricated using surface charge lithography

M. Stevens-Kalceff, I. Tiginyanu, V. Popa, T. Braniste, P. Brenner

Proceedings Volume 8766, 87660I (2013) https://doi.org/10.1117/12.2017670

KEYWORDS: Gallium nitride, Edge emitting semiconductor lasers, Etching, Photons, Ions, Ion beams, Lithography, Nanolithography, Ultraviolet radiation, Gallium

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Proceedings Article | 3 May 2011 Paper

Ultra-thin semiconductor membrane nanotechnology based on surface charge lithography

Ion Tiginyanu, Veaceslav Popa, Marion Stevens-Kalceff

Proceedings Volume 8068, 806814 (2011) https://doi.org/10.1117/12.890125

KEYWORDS: Gallium nitride, Etching, Ultraviolet radiation, Scanning electron microscopy, Nanotechnology, Ions, Lithography, Semiconductors, Electrons, Nanolithography

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Proceedings Article | 19 February 2009 Paper

Surface charge lithography for GaN micro- and nanostructuring

Ion Tiginyanu, Veaceslav Popa, Andrei Sarua, Peter Heard, Olesea Volciuc, Martin Kuball

Proceedings Volume 7216, 72160Y (2009) https://doi.org/10.1117/12.803679

KEYWORDS: Gallium nitride, Etching, Nanolithography, Ions, Nanostructuring, Lithography, Ion beams, Photomasks, Electrons, Nanowires

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Proceedings Article | 7 February 2009 Paper

Terahertz conductivity of magnetoexcitons and electrons in semiconductor nanostructures

J. Lloyd-Hughes, J. Faist, H. Beere, D. Ritchie, L. Sirbu, I. Tiginyanu, S. K. Merchant, M. Johnston

Proceedings Volume 7214, 72140N (2009) https://doi.org/10.1117/12.807546

KEYWORDS: Electrons, Terahertz radiation, Excitons, Magnetism, Semiconductors, Terahertz spectroscopy, Gallium arsenide, Spectroscopy, Quantum wells, Magnetic semiconductors

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Proceedings Article | 21 February 2005 Paper

Photoluminescence of Eu-doped ZnO structures

Veaceslav Ursaki, Emil Rusu, Victor Zalamai, Lilian Sirbu, Eduard Monaico, Ion Tiginyanu

Proceedings Volume 5822, (2005) https://doi.org/10.1117/12.612229

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Proceedings Article | 29 October 2001 Paper

Growth and characterization of crack-free GaN films grown on cracked Si-doped GaN templates

E. K. Sia, M. S. Hao, Soo-Jin Chua, I. Tiginyanu, V. Ichizli, Kabula Mutamba, Hans Hartnagel, Ji Zhang, S. Tripathy

Proceedings Volume 4594, (2001) https://doi.org/10.1117/12.446586

KEYWORDS: Gallium nitride, Reflectivity, Raman spectroscopy, Phonons, Statistical analysis, X-ray diffraction, Raman scattering, Scattering, Reflection, Metalorganic chemical vapor deposition

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