Meta-surfaces

A leap forward in optics. Illustration: Tel Aviv University

A leap forward in optics: Artificial intelligence accelerates the design of tiny metasurfaces

  • 2 תגובות
Tel Aviv University researchers have developed a diffusion model-based method that designs flat optical components in minutes — instead of hours and days — and demonstrates high accuracy in tasks such as beam splitting and polarization separation; Published
Electromagnetic structures. Courtesy of the researchers

Scientific breakthrough: A cyclic electromagnetic structure based on topological bonds has been measured for the first time

  • One response
Researchers from Tel Aviv University and Rafael have developed an innovative metasurface based on conductive loops in the form of bonds, which allows precise control of electromagnetic waves – and has been measured for the first time in an experiment.
When a point electromagnetic source that propagates perfect circular wavefronts (bottom row, left) is placed in front of a rigid dielectric surface, significant reflections and distortions in the wavefronts are observed (bottom row, right). When the same surface is coated with metal formations designed in the article according to the Generalized Huygens' Condition, the disturbances disappear thanks to the general-angular irregularities (bottom row, middle) and the ideal propagation is fully restored (as if the waves were propagating in free space, similar to the scenario on the left). Top row: Left: the measurement setup in which the surface (device) is illuminated and the field transmitted by a detector (detector) is measured. Middle: the dielectric surface that is created with a coating to suppress reflections at all angles. Right: reference surface without the coating (for which a significant return was observed).

Researchers at the Technion have developed a technology that gives "electromagnetic transparency" to hard surfaces

  • No comments
This type of transparency is relevant to a wide variety of applications including flat antennas, analog-optical computing devices and compact imaging systems
Science website logo
SEARCH