Ohio University’s Chemistry and Biochemistry Colloquium Series presents Dr. Richard Vaia on “From the Beaker to an Engineering Platform: Plasmonic NanoAssemblies”, Monday, Oct. 2, at 4:10 p.m. in Clippinger Laboratories 194.
Dr. Richard Vaia
Vaia is Technical Director, Functional Materials Division, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Wilmington, Ohio.
Abstract: Efficient focusing of optical fields at the nanoscale holds immense potential for chemical sensing, photodetection, spectroscopy, and optical information processing. Metallic nanoparticles and their assemblies are promising due to their intense light-matter interactions, which are one of the strongest in nature, with an optical cross-section greater than the particle volume. In particular, symmetry-broken architectures have attracted significant attention due to reported Fano resonances, enhanced nonlinear optical signals, and spatially localized second harmonic generation. Transitioning this potential to applications now require the development of techniques to integrate these plasmonic nanoparticle architectures into spatially ordered arrays and macroscopically aligned materials that are tunable and adaptive in a manner analogous to liquid crystals. Focusing on gold nanorods (AuNR) (Figure: top), we will discuss current efforts on AuNR functionalization with polymers, discrete cluster assembly, and fabrication of macroscopically aligned films and monoliths (Figure: bottom). These bottom-up architectures exhibit plasmon-plasmon and exciton-plasmon coupling, such as polarization sensitivity, fano-resonances, plasmon-induced transparency, enhanced emission efficiency, and nonlinear second harmonic and chiro-optical response.
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