Shaping High-Q Planar Fano Resonant Metamaterials toward Futuristic Technologies

摘要

Advances in plasmonic metamaterials have been rapidly evolving withrninnovations aimed at developing metadevices for real-world applications. Inrnreality, energy losses in plasmonic systems are prevalent and it is ofrnparamount importance to come up with solutions that could overcome thernlimitations that impede further advancements toward the miniaturizationrnof optoelectronic metadevices. High-Q Fano resonance as a scatteringrnphenomenon can be easily triggered by introducing asymmetry intornplasmonic systems, and thus it offers a simple approach for reducingrnradiative losses through lineshape engineering. High-Q Fano resonancernpossesses narrow linewidth and intensely confined electromagnetic fields,rnwhich makes it viable for widespread applications. The purpose of this reviewrnis to consolidate the current advances and contributions that high-Q Fanornresonance has made in the metamaterial community. Two general modes ofrnenergy loss including radiative and nonradiative losses are introduced andrnpossible ways to overcome these challenges are examined. Furthermore,rnapplications based on high-Q Fano resonance including sensors, lasingrnspasers, and optical switches are discussed, embracing the future of Fanornresonance based high performance photonic technologies.