Howard (Ho Wai) Lee, Baylor University, Texas, USA
Patrice Genevet, CNRS, CRHEA -Centre de Recherche sur l'Hétéro-Epitaxie et ses Applications, France
Pin-Chieh Wu, National Cheng Kung University, Taiwan
Ksenia Dolgaleva, University of Ottawa, Ottawa, Canada
There has been significant progress in the design of optical metasurfaces and metalenses, enabling various unique properties and novel applications in optical imaging/display, quantum technology, sensing, holography, and information storage. Due to the flat nature of metasurfaces (typical thickness ~ 300nm), conventional three-dimensional optical elements such as prisms or lenses could be replaced by low-profile, and low-cost flat components. However, the lack of efficient tunability due to the fixed conductivity of noble metal or permittivity of dielectrics is one of the key limitations holding back fundamental advances and novel optical applications for metasurfaces. Several approaches have been used in the last few years to realize phase and amplitude modulation of metasurfaces for developing nanoscale reconfigurable metasurface devices. Modulation techniques include electrical field-effect control, ultrafast nonlinear optical tunability, nano-mechanical motion, and thermal dynamics. Advanced optical materials such as conducting oxides, semiconductors, graphene, liquid crystals, and phase change materials have also been used as tunable materials.
This special symposium will review the latest progress, trends, and current challenges in the area of tunable and nonlinear metasurfaces based on different reconfigurable mechanisms. Novel optical materials, structural configurations, and advanced optical science/functionality of active metasurfaces for applications spanning from imaging system, bio/chemical sensing, energy harvesting devices, and data storage will also be discussed.