Designing Metagratings via Local Periodic Approximation: From Microwaves to Infrared
Designing Metagratings via Local Periodic Approximation: From Microwaves to Infrared
Metamaterial-inspired diffraction gratings, or $m\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}g\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}g\phantom{\rule{0}{0ex}}s$, have recently demonstrated superb efficiency in wavefront manipulation. Unfortunately, the absence of a systematic design procedure has held back the development of complex structures operating in different parts of the electromagnetic spectrum. The authors present a simulation-based approach for constructing metagratings in a ``unit cell …