The National Testing Agency (NTA) will soon be commencing the registration process National Eligibility cum Entrance Test ...

A new metasurface design lets light of different spins bend, focus, and behave independently—while staying sharp across many ...

Abstract: In this letter, we report a weighted modal wavefront control method for surmounting the problems of sub-aperture spot missing in Shack-Hartmann wavefront sensors (SHWFS) and the resultant ...