One-Scan Study of the Size-Dependent Light Localization by Pure Dye Nano-Doughnuts and Nano-Rings

International audienc

Photoinduced Doughnut-Shaped Nanostructures

We show that an incoherent unpolarized single-beam illumination is able to photoinduce nano-doughnuts on the surface of azopolymer thin films. We demonstrate that individual doughnut-shaped nano-objects as well as clusters of several adjacent nano-doughnuts can be formed and tailored with wide range of typical sizes, thus providing a rich field for applications in nanophotonics and photochemistry.Comment: 13 pages, 3 figures, first version to chem. phys. lett. 201

Confined surface waves in layered dielectric materials

We demonstrate deep subwavelength confinement of surface phonon-polaritons in silicon carbide by capping the crystal with nanometric layers of MoS2. Near-field nano-imaging shows 85 time surface wave confinement in comparison with free-space wavelength of 11.15 micrometers

Near-Field Optical control of Doughnut-Shaped Nanostructures

The application of a local near-field optical excitation can be used to control step-by-step the reshape of individual doughnut-shaped azopolymer nano-objects by varying the time of illumination demonstrating its promising performance as a functional nano-object. The possibility to provide both photoinduced reshaping opens a way to the fundamental study of size-dependent scaling laws of optical properties, photoinduced reshaping efficiency and nanoreactor or nanoresonator behavior at nanometer scale. As an example the nano-object is used to self-assembly polystyrene nanospheres in a supraball.Comment: 15 pages, 6 figure

Near-Field Optical Modification of individual nano-objects

International audienc

Plasmonics of topological insulators

We discuss the plasmonic properties of chalcogenide topological insulators arising from interband transitions and Drude-like response of metallic surface states in the UV to mid-IR, which provide a new platform for electronics and photonics integration

International Journal of Emerging Technologies in Computational and Applied Sciences (IJETCAS) www.iasir.net Mathematical Analysis of Asymmetrical Spectral Lines

I. Introduction The form of the spectral components (lines and bands) and their parameters, such as location, intensity, width and statistical moments, constitute the main source of spectrochemical informatio