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Graduate Student Seminar - 10/09/2015

"Chiral Plasmonic Nanostructures for Enhanced Chiroptical Spectroscopy"

by Andrew Lawson

Friday, October 9, 2015 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisor:  Associate Professor Oded Rabin

Chirality, or handedness, is especially important in life science applications, such as pharmaceuticals, where the chirality of a drug must be well characterized and controlled to avoid potential toxicity. However, with common optical spectroscopy methods it is difficult to distinguish between materials with the same chemical composition but opposite chirality. We propose to improve chiral optical detection through plasmonic enhancement. In this work, we demonstrate the fabrication and spectroscopic analysis of plasmonic structures with increasing complexity from simple achiral nanorods to two-dimensional chiral structures. We report on the trends with nanostructure dimensions, geometry, material, and substrate material, as well as polarization effects. Additionally, we demonstrate a practical fabrication method for producing fully three-dimensional chiral plasmonic nanostructures.

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