Northwestern Computational Research Day – April 19 , 2016

This animation shows the polarization-dependent resonances of gold nanoparticle (NP) line patches. Multiple resonances were observed in hierarchical NP arrays influenced by nano-scale NP periodicity and microscale patch periodicity. This symmetry-breaking structure of line patches, however, shows polarization-dependent optical properties and different coupling along the x and y directions. I used Adobe Illustrator to put together the spectra at different light polarization angle and stack them in Photoshop for animation. In order to present the scientific origin more effectively, different spectra were plotted in different colors and the 3D plotting provide rich information of spectra evolvement. As angle increased from 0° to 90°, the narrow resonance at shorter wavelength maintained its location and amplitude but a new resonance at longer wavelength gradually emerged and increased in intensity. This is important in differentiating the origin of longer wavelength mode from patch periodicity. Instead of a steady illustration, this animation captures the resonance evolution more clearly. Title: Obesity: Escalating Costs, Socioeconomics and Geography Author(s): James Herbick [email protected] Sandra Castillo [email protected] Christi Giroux, [email protected] Kristine Palmer [email protected] Andrew Vignes [email protected] School/Dept.: School of Professional Studies M.S. in Predictive Analytics Program