Nanowerk June 8, 2018
Researchers in Singapore designed and experimentally realized high efficiency beam deflecting and polarization beam splitting metasurfaces consisting of GaN nanostructures etched on the GaN epitaxial substrate itself. They demonstrated a polarization insensitive beam deflecting metasurface with 64% and 90% absolute and relative efficiencies, and the broad functionality that can be realized on this platform. The broadband response in the blue wavelength range of 430–470 nm. The nanophotonic platform of GaN shows the way to off- and on-chip nonlinear and quantum photonic devices working efficiently at blue emission wavelengths common to many atomic quantum emitters such as Ca+ and Sr+ ions… read more. TECHNICAL ARTICLE
Nanopillar arrays fabricated directly on a GaN surface. (Image: A*STAR Data Storage Institute)