Metamaterial and Metastructural Architectures for Novel C4ISR Devices and Sensors

We have developed novel metamaterial devices and metastructures with new electronic and optoelectronic OE properties and used them to design and fabricate devices, such as slow-light, low-loss waveguides, terahertz modulators, and wideband radio frequency RF antennas with new functionalities. These devices will provide basic building blocks for future chip-scale semiconductor-integrated OE circuits and provide new capabilities over a wide range of frequencies from microwaves, terahertz, and into the infrared in Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance systems. We focused on 3 different types of metamaterial devices as basic building blocks. These are low-loss, slow-light, hollow-core metastructure waveguides for chip-scale-integrated OERF photonic circuit metamaterial devices for terahertz communicationsensingimaging and tunable RF metamaterials. Some of our major accomplishments in this area of study include developing and demonstrating the world s first silicon-based slow-light metastructure hollow-core waveguide, developing and demonstrating new tunable terahertz metamaterial devices, and designing and fabricating terahertz metastructure hollow-core waveguide. The DSI project has resulted in 14 publications, 1 US patent, 1 invention disclosure, and 1 press release.