Design and Modeling capabilities in Ramki Kalyanaraman's group

Please get in touch if you would like to use one of our capabilities

We have the capability to design optical materials for multilayer coatings as well as nanocomposites for plasmonic or scattering-based applications, like in solar energy collection or waveguiding. For instance, collective oscillations of the conduction electrons present in the metal volume or surface are known as plasmons. The spectral location of the plasmon resonance is known to depend on metal- and dielectric-type as well as the shape, size and spacing of nanostructures. Therefore, plasmonics with metallic nanoparticles on surfaces or embedded in dielectric materials offers great promise in guiding light along nanoscale interconnects for ultrafast information processing as well for use in materials showing enhanced or tunable light harnessing. For instance, several groups have shown that single-metal nanoparticles on or encapsulated by dielectrics on Si photodiodes result in enhanced photocurrent at specific wavelengths that were correlated to the surface plasmon resonance. Therefore, broadband plasmonic absorbers could significantly improve solar energy harvesting of semiconductor solar cells, and thus could greatly help overcome the outstanding global challenge to improve solar energy harvesting. However, despite the obvious potential impact of plasmonic materials on science and technology, an efficient, cost-effective and reliable process to design and nanomanufacture plasmonic nanocomposites does not exist. In this modeling activity (depicted in Fig. 1)we collaborate with Prof. Hernando Garcia at Southern Illinois University to develop and use self-consistent optical mixing models to accurately predict the linear and non-linear optical and plasmonic behavior in multi-metal NCs.

Send us a message by email to ramki @ utk dot edu!