Concept
Métamatériau
Concepts associés (33)
Terahertz metamaterial
A terahertz metamaterial is a class of composite metamaterials designed to interact at terahertz (THz) frequencies. The terahertz frequency range used in materials research is usually defined as 0.1 to 10 THz. This bandwidth is also known as the terahertz gap because it is noticeably underutilized. This is because terahertz waves are electromagnetic waves with frequencies higher than microwaves but lower than infrared radiation and visible light.
Vladimir Shalaev
Vladimir (Vlad) M. Shalaev (born February 18, 1957) is a Distinguished Professor of Electrical and Computer Engineering and Scientific Director for Nanophotonics at Birck Nanotechnology Center, Purdue University. Shalaev earned a Master of Science Degree in physics (summa com laude) in 1979 from Krasnoyarsk State University (Russia) and a PhD Degree in physics and mathematics in 1983 from the same university. Shalaev received several awards for his research in the fields of nanophotonics and metamaterials, including the Max Born Award of the Optical Society of America (OSA), the Willis E.
Réfraction négative
thumb|300px|Schéma de la réflexion-transmission d'une onde plane lors d'un saut d'indice : réfraction normale à droite, réfraction négative à gauche. thumb|Vidéo représentant la réfraction négative d'une onde sur un dioptre plan. La réfraction négative est un phénomène de réfraction qui ne suit pas les lois de Descartes applicables dans le modèle de l'optique géométrique. Dans ce cas, l'onde réfractée se propage du même côté de la normale à la surface que l'onde incidente.