Nanoplasmonics for Ultrafast Coherent Control of Optical Fields.

摘要

This one-year project investigated plasmonic nanoantennas, comparing snowflake and log-periodic designs, and applied developed tools to nanoantenna arrays, 'chirped signals', and nanoantenna responses with dielectric and graphene loads. The project was seeking to maximize bandwidth and reduce temporal pulse width. Some findings: time-domain methods enabled modeling of nonlinearity and chirp, a circularly polarized pulse train can sequentially excite arms of an antenna to create a center-point pulse train, closely-spaced antennas can be resolved, log-periodic antennas have increased bandwidth vs snowflake, and the high surface impedance inherent to graphene results in high field concentrations.