Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Virginie Lousse"'
Publikováno v:
Journal of The Royal Society Interface. 5:1387-1390
Iridescent butterfly wing colours result from the interaction of light with sub-micrometre structures in the scales. Typically, one scale contains one such photonic structure that produces a single iridescent signal. Here, however, we show how the do
Autor:
Jean-Pol Vigneron, L.P. Biró, Zs. Bálint, Krisztián Kertész, Géza I. Márk, Virginie Lousse, Zofia Vértesy
Publikováno v:
Materials Science and Engineering: C. 27:941-946
The photonic crystal type nanostructures in the scales of male individuals of two butterfly species: Cyanophrys remus and Albulina metallica were investigated by electron microscopy and reflectance measurements. While the colors of C. remus arise fro
Autor:
Paul V. Braun, Mingjie Xu, Florencio Garcia-Santamaria, Shanhui Fan, Jennifer A. Lewis, Virginie Lousse
Publikováno v:
Advanced Materials. 19:1567-1570
The fabrication of 3D structures with a large complete photonic bandgap (PBG) has been an important goal, since the concept was introduced two decades ago. Many proposed structures exhibit PBGs with theoretical relative widths below 5%, often too nar
Autor:
Jean-Pol Vigneron, Virginie Lousse
Publikováno v:
Optical and Quantum Electronics. 39:377-385
In chirped photonic crystals, the structural parameters describing a unit cell are progressively varied from a unit cell to the nearest ones. Geometric and dielectric response functions can be affected by this modulation, but here we only investigate
Autor:
Zofia Vértesy, Krisztián Kertész, Jean-Pol Vigneron, László P. Biró, Géza I. Márk, Zsolt Bálint, Virginie Lousse
Publikováno v:
Nanopages. 1:195-208
The complex photonic crystal type nanoarchitectures found in the wing scales of the male butterfly Cyanophrys remus were investigated structurally by electron microscopy and optically by reflectance spectroscopy. Both the vivid metallic blue of the d
Autor:
Paul V. Braun, Virginie Lousse, Shanhui Fan, Gregory M. Gratson, Jennifer A. Lewis, Mingjie Xu, Florencio Garcia-Santamaria
Publikováno v:
Advanced Materials. 18:461-465
Impressive developments in silicon microfabrication are enabling new applications in photonics, microelectromechanical systems (MEMS), and biotechnology. Yet conventional Si microfabrication techniques require expensive masks and time-consuming proce
Autor:
Jean-Pol Vigneron, Zs. Bálint, Géza I. Márk, Virginie Lousse, Krisztián Kertész, L.P. Biró, Zofia Vértesy
Publikováno v:
Current Applied Physics. 6:252-258
Photonic crystal type structures of biological origin were investigated by scanning electron microscopy (SEM) and UV–VIS reflectance measurements. It was demonstrated that despite the moderate refractive index contrast between chitin and air, biolo
Autor:
Virginie Lousse, Jean-Pol Vigneron
Publikováno v:
Physica B: Condensed Matter. 338:171-177
A Fabry–Perot cavity can be closed by reflecting slabs made with different types of materials. An interesting situation occurs when the slabs are constructed from a photonic crystal in the nonpropagating regime, i.e. with an incident frequency tune
Publikováno v:
Optical and Quantum Electronics. 34:45-51
This paper describes the formation of complete gaps in a semiconductor effective-mass carrier density of states, at the conduction or valence band edges of a direct-gap material periodically modulated on a length scale significantly larger than the b
Publikováno v:
Physical Review B. 62:7133-7137
This paper examines the possibility of obtaining complete gaps in the density of states of effective-mass carriers in a semiconductor, at the conduction or valence band fundamental edge. The dispersion relations are defined for waves associated with