PAMS Seminar: "Novel Physical Phenomena in Nano-arrays and Nanostructures" by Dr. Rana Biswas

Dr. Rana Biswas
Iowa State University
Ames National Laboratory

Abstract:

Nanostructures and nano-arrays with spatial periods near optical wavelengths offer a platform to control light-matter interactions, that can lead to novel phenomena in nanoplasmonics, nanophotonics, and quantum information science. We describe gold-coated nanoarrays, that show unusual extraordinary optical transmission phenomena. Quantum dots embedded within the nanocup arrays show a radiative decay rate that is enhanced by as much as a factor of 20, from the interaction of the strong optical field of the nano-array with the luminescent quantum dot. We describe how nano-arrays can enhance the light-outcoupling from organic light-emitting diodes, through diffractive effects. We describe insulating nano-arrays formed by replica-molding on elastomeric substrates that exhibit unusual surface electric potential distributions, that are formed by intricate nanoscale patterns of surface tribocharge. Experimental work combined with computational simulations in these applications will be discussed.

Free