Opportunity at Air Force Research Laboratory (AFRL)
Metamaterials: nano-optics and structured systems for tailored nonlinear properties
Materials & Manufacturing, RX/Photonic Materials
||Wright-Patterson AFB, OH 454337817
|Urbas, Augustine M.
Metamaterials redefine the fundamental properties of systems by creating artificial, mesoscale meta-atoms which dictate the system response to external fields. These meta-atoms and their mutual interactions can yield property sets of which natural materials are not capable and tailor materials properties to specific needs. Researchers have proposed that closely matched and ultracompact antennas, and materials with extremely fast phase velocities for coupling devices could be built with suitably engineered meta-atoms. This opportunity focuses on the exploration of engineered optical properties from nanostructured systems. By translating electrical engineering concepts from the RF range into the optical, it is possible to control field concentrations and interactions in unprecidented capacities. By suitably designing optical antennas or meta-atoms which interact at optical frequencies, it is possible to engineer the response of a material composed of plasmonic and nonlinear elements. While many fabrication techniques will be explored to evaluate concepts, particular interest is placed in strategies that allow for large area fabrication. Self-assembly facilitated fabrication, directed assembly, and holographic patterning are emphasized. The nonlinear response of these systems will be evaluated at different scales using ultrafast NSOM to investigate the single "atom" response, microscopic measurements to probe small collections, and free space measurements to extract "bulk" propoerties. These different scales will be concurrently studied by EM computational techniques to gain a better understanding of how the bulk properties and response arise out of the individual units and their interaction. Ultimately, these systems will be engineered to enable integrated control of ultrafast systems, detection strategies, sensor enhancements, and new filter technologies.
Nonlinear optics; Metamaterials; Self-assembly; Plasmonics; Near-field measurement; Reverse saturable absorption; Two-photon absorption nonlinear optics;
Open to U.S. citizens and permanent residents
Open to Postdoctoral and Senior applicants