Lista publicaţiilor: Foll Helmut - 56

Design of negative-refractive-index materials on the basis of rods with a gradient of the dielectric constant

Sergentu Vladimir Vasile, Ursachi Veaceslav Vladimir, Tiginyanu Ion, Foca F., Foll Helmut , Boyd Robert W.

1 Institute of Applied Physics, Academy of Sciences of Moldova, 2 Christian-Albrechts University of Kiel, 3 University of Rochester

Applied Physics Letters

Nr. / 2007 / ISSN 0003-6951

Disponibil online 10 April, 2018

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Negative index materials based on rods with refractive index profile

Foca Eugen, Carstensen Juergen , Foll Helmut , Sergentu Vladimir Vasile, Ursachi Veaceslav Vladimir, Tiginyanu Ion, Daschner Frank , Knochel Reinhard H.

1 Institute for Material Science, Christian-Albrechts-University of Kiel, 2 Institute of Applied Physics, Academy of Sciences of Moldova, 3 Christian-Albrechts University of Kiel

Optics InfoBase Conference Papers

2007. Washington, D.C.. Optical Society of America (OSA). 0-0.

Disponibil online 29 January, 2024

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2006 - 4

Polarization dependent functionality of optical elements based on (Quasi) periodic two-dimensional structures

Foca Eugen, Carstensen Juergen , Foll Helmut , Sergentu Vladimir Vasile, Tiginyanu Ion, Daschner Frank , Knochel Reinhard H.

1 Institute for Material Science, Christian-Albrechts-University of Kiel, 2 Institute of Applied Physics, Academy of Sciences of Moldova, 3 Christian-Albrechts University of Kiel

Optics InfoBase Conference Papers

2006. Washington, D.C.. Optical Society of America (OSA). 0-0.

Disponibil online 29 January, 2024

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Focusing slabs made of negative index materials based on inhomogeneous dielectric rods

Sergentu Vladimir Vasile, Ursachi Veaceslav Vladimir, Tiginyanu Ion, Foca Eugen, Foll Helmut , Boyd Robert W.

1 Institute of Applied Physics, Academy of Sciences of Moldova, 2 Christian-Albrechts University of Kiel, 3 University of Rochester

Physica Status Solidi (A) Applications and Materials Science

Nr. / 2006 / ISSN 1862-6300

Disponibil online 11 April, 2018

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Photonic crystals as host material for a new generation of microwave components

Daschner Frank , Knochel Reinhard H., Foca Eugen, Carstensen Juergen , Sergentu Vladimir Vasile, Foll Helmut , Tiginyanu Ion

1 Christian-Albrechts University of Kiel, 2 Institute of Applied Physics, Academy of Sciences of Moldova

Advances in Radio Science

Nr. / 2006 / ISSN 1684-9965

Disponibil online 11 April, 2018

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Strongly frequency dependent focusing efficiency of a concave lens based on two-dimensional photonic crystals

Foca Eugen, Foll Helmut , Carstensen Juergen , Sergentu Vladimir Vasile, Tiginyanu Ion, Daschner Frank , Knoechel Reinhard H.

1 Christian-Albrechts University of Kiel, 2 Institute of Applied Physics, Academy of Sciences of Moldova

Applied Physics Letters

Nr. / 2006 / ISSN 0003-6951

Disponibil online 11 April, 2018

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2005 - 10

Morphology and chemical composition microanalysis of 2D and 3D ordered structures on porous InP

Langa Sergiu , Sirbu Lilian, Monaico Eduard V., Carstensen Juergen , Foll Helmut , Tiginyanu Ion

1 Technical University of Moldova, 2 Christian-Albrechts University of Kiel

Physica Status Solidi (A) Applications and Materials Science

Nr. / 2005 / ISSN 1862-6300

Disponibil online 4 October, 2023

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Efficient focusing with a concave lens based on a photonic crystal with an unusual effective index of refraction

Foca Eugen, Foll Helmut , Daschner Frank , Sergentu Vladimir Vasile, Carstensen Juergen , Frey Stefan, Knoechel Reinhard H., Tiginyanu Ion

1 Christian-Albrechts University of Kiel, 2 Institute of Applied Physics, Academy of Sciences of Moldova

Physica Status Solidi (A) Applications and Materials Science

Nr. / 2005 / ISSN 1862-6300

Disponibil online 13 April, 2018

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Uniform and nonuniform nucleation of pores during the anodization of Si, Ge, and III-V semiconductors

Langa Sergiu , Carstensen Juergen , Christophersen Marc, Steen K., Frey Stefan, Tiginyanu Ion, Foll Helmut

1 Christian-Albrechts University of Kiel, 2 Technical University of Moldova

Journal of the Electrochemical Society

Nr. / 2005 / ISSN 0013-4651

Disponibil online 12 April, 2018

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Waveguide structures based on porous indium phosphide

Langa Sergiu , Frey Stefan, Carstensen Juergen , Foll Helmut , Tiginyanu Ion, Hermann Martin, Bottger Gunnar

1 Christian-Albrechts University of Kiel, 2 Institute of Applied Physics, Academy of Sciences of Moldova, 3 Technical University of Moldova, 4 Technical University Munich, 5 Technische Universitat Hamburg-Hamburg

Electrochemical and Solid-State Letters

Nr. / 2005 / ISSN 1099-0062

Disponibil online 13 April, 2018

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Engineering the morphology of porous InP for waveguide applications

Langa Sergiu , Lolkes Stefan , Carstensen Juergen , Hermann Martin, Bottger Gunnar, Tiginyanu Ion, Foll Helmut

1 Christian-Albrechts University of Kiel, 2 Technical University Munich, 3 Technische Universitat Hamburg-Hamburg, 4 Institute of Applied Physics, Academy of Sciences of Moldova

Physica Status Solidi C: Conferences

Nr. / 2005 / ISSN 1610-1634

Disponibil online 23 July, 2023

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Nucleation and growth of macro pores on (100) n-type Ge

Langa Sergiu , Carstensen Juergen , Tiginyanu Ion, Foll Helmut

1 Christian-Albrechts University of Kiel, 2 Technical University of Moldova

Physica Status Solidi C: Conferences

Nr. / 2005 / ISSN 1610-1634

Disponibil online 23 July, 2023

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Efficient focusing with an ultra-low effective-index lens based on photonic crystals

Foca Eugen, Foll Helmut , Daschner Frank , Sergentu Vladimir Vasile, Carstensen Juergen , Knochel Reinhard H., Tiginyanu Ion

1 Christian-Albrechts University of Kiel, 2 Institute of Applied Physics, Academy of Sciences of Moldova

Materials Research Society Symposium - Proceedings

Vol. 869. 2005. Warrendale, Pennsylvania. Materials Research Society. 71-76.

Disponibil online 31 January, 2024

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Strong visible emission from porous GaP doped with Eu and Tb ions

Elhouichet Habib, Daboussi S., Ajlani Hosni, Najar Adel, Moadhen A., Oueslati Meherzi M., Tiginyanu Ion, Langa Sergiu , Foll Helmut

1 Universite de Tunis, Faculte des Sciences, 2 Institute of Applied Physics, Academy of Sciences of Moldova, 3 Technical University of Moldova, 4 Christian-Albrechts University of Kiel, 5 Necunoscută, Germania

Journal of Luminescence

Nr. / 2005 / ISSN 0022-2313

Disponibil online 13 April, 2018

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Photonic crystals with unusual index of refraction as metamaterials for an efficient concave lens

Foca Eugen, Carstensen Juergen , Foll Helmut , Daschner Frank , Knochel Reinhard H., Sergentu Vladimir Vasile, Tiginyanu Ion

1 Christian-Albrechts University of Kiel, 2 Technical University of Moldova

Optics InfoBase Conference Papers

2005. Washington, D.C.. Optical Society of America (OSA). 0-0.

Disponibil online 29 January, 2024

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Photoluminescence mechanisms of Tb 3+-doped porous GaP

Elhouichet Habib, Oueslati Meherzi M., Lorrain Nathalie , Langa Sergiu , Tiginyanu Ion, Foll Helmut

1 Universite de Tunis, Faculte des Sciences, 2 Optronics Laboratory, UMR 6082, Lannion, 3 Institute of Applied Physics, Academy of Sciences of Moldova, 4 Christian-Albrechts University of Kiel, 5 Technical University of Moldova

Physica Status Solidi (A) Applications and Materials Science

Nr. / 2005 / ISSN 1862-6300

Disponibil online 4 October, 2023

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2004 - 2

Focusing effect of photonic crystal concave lenses made from porous dielectrics

Sergentu Vladimir Vasile, Foca Eugen, Langa Sergiu , Carstensen Juergen , Foll Helmut , Tiginyanu Ion

1 Institute of Applied Physics, Academy of Sciences of Moldova, 2 Christian-Albrechts University of Kiel

Physica Status Solidi (A) Applied Research

Nr. / 2004 / ISSN 0031-8965 / ISSNe 1521-396X

Disponibil online 20 November, 2023

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Cathodoluminescence microanalysis of porous GaP and InP structures

Tiginyanu Ion, Langa Sergiu , Sirbu Lilian, Monaico Eduard V., Stevens-Kalceff Marion A. , Foll Helmut

1 Institute of Applied Physics, Academy of Sciences of Moldova, 2 Technical University of Moldova, 3 University of New South Wales, 4 Christian-Albrechts University of Kiel

EPJ Applied Physics

Vol. 27, Ediția 1-3. 2004. Les Ulis. EDP Sciences. 81-84.

Disponibil online 30 January, 2024

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2003 - 10

Electrochemical pore etching in Ge

Langa Sergiu , Christophersen Marc, Carstensen Juergen , Tiginyanu Ion, Foll Helmut

1 Christian-Albrechts University of Kiel, 2 Technical University of Moldova

Physica Status Solidi (A) Applied Research

Nr. / 2003 / ISSN 0031-8965 / ISSNe 1521-396X

Disponibil online 20 November, 2023

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Porous III-V compounds as nonlinear optical materials

Tiginyanu Ion, Kravetsky Igor, Langa Sergiu , Marowsky Gerd , Monecke Jochen , Foll Helmut

1 Institute of Applied Physics, Academy of Sciences of Moldova, 2 Technical University of Moldova, 3 Laser Laboratory Goettingen, 4 Institut für Theoretische Physik, TU Bergakademie Freiberg, 5 Christian-Albrechts University of Kiel

Physica Status Solidi (A) Applied Research

Nr. / 2003 / ISSN 0031-8965 / ISSNe 1521-396X

Disponibil online 20 November, 2023

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