Spatiotemporal light control with frequency-gradient metasurfaces
نویسندگان
چکیده
منابع مشابه
Two-dimensional control of light with light on metasurfaces
The ability to control the wavefront of light is fundamental to focusing and redistribution of light, enabling many applications from imaging to spectroscopy. Wave interaction on highly nonlinear photorefractive materials is essentially the only established technology allowing the dynamic control of the wavefront of a light beam with another beam of light, but it is slow and requires large opti...
متن کاملReconfigurable Gradient Metasurfaces With Random Access
Since metamaterials have enabled the design of almost arbitrary landscapes of static optical properties and functionalities, dynamic temporal and spatial control over metamaterial properties has become the next big challenge [1]. Here we demonstrate the first randomly addressable reconfigurable metamaterials, thus enabling fast and high-contrast control over optical properties simultaneously in...
متن کاملEnhancing spoof surface-plasmons with gradient metasurfaces
The coupling between surface plasmons and free electrons may be used to amplify waves or accelerate particles. Nonetheless, such an interaction is usually weak due to the small interaction length or velocity mismatching. Here a mechanism for enhancing the coupling between plasmonic fields and relativistic electrons is proposed. By using a weakly gradient meta-surface that supports the spoof sur...
متن کاملWave-front Transformation with Gradient Metasurfaces
Relying on abrupt phase discontinuities, metasurfaces characterized by a transversely inhomogeneous surface impedance profile have been recently explored as an ultrathin platform to generate arbitrary wave fronts over subwavelength thicknesses. Here, we outline fundamental limitations of passive gradient metasurfaces in molding the impinging wave and show that local phase compensation is essent...
متن کاملGradient Nonlinear Pancharatnam-Berry Metasurfaces.
We apply the Pancharatnam-Berry phase approach to plasmonic metasurfaces loaded by highly nonlinear multiquantum-well substrates, establishing a platform to control the nonlinear wave front at will based on giant localized nonlinear effects. We apply this approach to design flat nonlinear metasurfaces for efficient second-harmonic radiation, including beam steering, focusing, and polarization m...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science
سال: 2019
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aax2357