Optimizing and Discovering Light-Matter Phenomena in Dipolar Materials
Abstract
The main objective of this 3-year proposal is to understand, design and control many lightmatter phenomena in functional dipolar systems, in general, and to discover optimized physical responses and novel phenomena of large importance, in particular. Examples of studies to be conducted are: (1) optimization of the change of refractive index under electric field in nitride superlattices (first year); (2) demonstration of light-induced structural phase transitions and population control in ferroelectrics and multiferroics (first and second years); (3) microscopic understanding of all-optical switching and rotation of the electrical polarization in polar oxides (second year); (4) revealing that, and explaining why, transition between different electrical topological states (such as labyrinths and skyrmions) can be accomplished by the application of light in ferroelectric thin films (second and third years); and (5) formation of various structural phases and domains, as well as the investigation of their electronic and optical properties, in hybrid perovskites at finite temperature (first, second and third years). This research program is highly relevant to ARO for, e.g., improving and designing remote switchable devices, new communication devices, phase arrays, phase shifters, external modulators, etc. This objective will be achieved via the development and use of state-of-the-art ab-initio numerical tools: (i) first-principles techniques, including novel ones and large-scale methods; and (ii) effective Hamiltonians that extend the reach of first-principles calculations by modeling properties of bulks and nanostructures made of perovskite materials at finite temperature. Collaborations with world-class scientists having a vital program (including an experimental one) on light-matter interactions in dipolar materials will be further strengthened. A deep knowledge of dipolar compounds and complex phenomena is expected to be gained, via the variety of effects and systems to be investigated and collaborations between the University of Arkansas and other institutions. These joint efforts will be the basis of a network for future collaborations, and have also the potential to result in the realization of devices with improved and/or new functionalities.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 25, 2021
- Source ID
- W911NF2110113
Entities
People
- Laurent Bellaiche
Organizations
- Army Contracting Command
- United States Army
- University of Arkansas