Laser-Induced Periodic Surface Structures (LIPSS) based Smart Tunable-Switching Metasurfaces
Abstract
Laser-induced periodic surface structures (LIPSS) is a single step processing method for nanostructuring of surfaces, features such as periodicity, orientation and chemistry can be finely controlled by conveniently adjusting the laser irradiation parameters. State of the art in the field sees a variety of materials including metals, semiconductors and insulators generating new scientific questions on the laser matter interaction and mechanisms that govern the surface structuring of materials. In this project we focus on the creation of smart tunable-switching metasurfaces by the direct writing of LIPSS on titanium and vanadium; we aim the formation of both titanium oxides and vanadium oxides to take advantage of its metal-dielectric phase transition when increasing the material temperature. The direct laser writing using femtosecond laser pulses, in atmospheric air, allows for the simultaneous formation of the metallic oxide of interest and LIPSS. Wavelength, incident laser beam polarization, laser fluence and laser scanning speed determines the specific characteristics of the obtained metasurface. We will study the optimal laser irradiation conditions for the formation of practical tunable-switching metasurfaces. It is of interest, and one of the main objectives in this project, to investigate if the metal-dielectric phase transition for titanium and vanadium oxides is modified for laser synthesized metallic oxides as compared to the transition temperature for these metallic oxides synthesized under conventional thermal treatment. We will also explore specific application of the formed metasurfaces on sensing and optically tuned interfaces.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 22, 2024
- Source ID
- FA95502310027
Entities
People
- Santiago Camacho-lopez
Organizations
- Air Force Office of Scientific Research
- Ensenada Center for Scientific Research and Higher Education
- United States Air Force