Orbital angular momentum (OAM) has garnered increasing interest in spectral multiplexing. In this letter, a low-profile, high-purity OAM transmitter array based on Huygens’ unit cell is proposed, and ...

“This is more exciting than New Year’s Eve!” exclaimed a man in the stands of Ipswich Town Football Club, as a large clock counted down the minutes and seconds until – not a kickoff, but ...