Coherent Effects in Hybrid Nanostructures for Lineshape Engineering of Electromagnetic Media
Abstract
The MURI: Coherent Effects in Hybrid Nanostructures for Lineshape Engineering of Electromagnetic Media was started with the on the following goals: to understand, design, and optimize standalone nanoparticles and their assemblies for transparency windows at specific frequencies; collaborative studies on morphologies resulting in tailored spectral transparency windows; to develop new, low-loss, lower-cost, benign, metallic and semiconductor nanoparticles and nanocomplexes to realize these effects; to perform optical measurements from the visible to the far-IR regions of the spectrum, to characterize and optimize engineered linewidths in these systems; to advance the surface chemistry of nanoassemblies, facilitating fluid or vapor phase particle dispersal for evaluation of particulate optical properties. As the MURI progressed, we focused the nanocrystal synthesis to aluminum-based nanocrystals and their modifications and developed algorithms and techniques to image through scattering media. Ligand-directed growth of Al reduced-symmetry NCs, to extend Al NC resonances into and across the infrared region of the spectrum; Catalyst variation for controlled-aspect-ratio Al NC nanorods and large-aspect-ratio nanowires, to examine the long-wavelength properties and capabilities of large aspect-ratio nanorods; Seed-mediated growth by Ag nanostructures: exploiting the lattice-matching between Ag and Al to synthesize reduced-symmetry Al nanostructures such as nanoplates (in collaboration with Nanocomposix); H2O-based separation procedures for coated Al NC and NRs, critical for all chemically synthesized Al nanoparticle, enabled by our coatings developed in the last funding cycle; Incorporation of new materials for added functionality and stability: Ti doping of Al NCs (TiAl cores); Al-dopedTiO2 coating layers; growth of TiN coatings around Al NCs for added infrared capabilities along with high temperature durability Imaging through scattering media.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 16, 2021
- Accession Number
- AD1203020
Entities
People
- Naomi J. Halas
Organizations
- Rice University