Research

This research area focuses on the use of inorganic nanosheets and thin slabs to realize new capabilities in electromagnetics at millimeter-wave, sub-millimeter-wave, and terahertz frequencies. The work spans theoretical modeling, materials synthesis, device fabrication, and experimental characterization of nanosheet-based electromagnetic components.

A central direction is the development of self-assembled slow-wave structures, where nanosheets or thin conductive slabs spontaneously roll into helical geometries. These structures are investigated as scalable and mass-producible alternatives to conventional wire helices used in traveling-wave tubes and related broadband amplifiers. Their electromagnetic behavior is studied in both “cold” (no electron beam) and “hot” (with electron beam) operating conditions.

Another major effort is the development of solid-state terahertz sources. One approach employs monolayer graphene mechanically shaped into periodic trajectories on nanopatterned substrates, enabling terahertz radiation through carrier motion under an applied DC voltage. This work aims to provide compact, widely deployable terahertz emitters.

Additional projects include reconfigurable antennas, data lines, and power lines for space applications, as well as multifunctional materials that integrate electromagnetic shielding with infrared detection. These projects are supported by extramural funding from federal agencies including the Air Force Office of Scientific Research, the Department of Energy, and the Air Force Research Laboratories.