Open AccessMeta-grating outcouplers for optimized beam shaping in the visible
Author(s) -
Chad Ropp,
Alexander Yulaev,
Daron Westly,
Gregory Simelgor,
Vladimir Aksyuk
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.424644
Subject(s) - optics , grating , apodization , photonics , fabrication , chip , beam (structure) , holography , materials science , diffraction grating , coupling (piping) , wavelength , optoelectronics , free space optical communication , optical communication , physics , computer science , telecommunications , medicine , alternative medicine , pathology , metallurgy
Accurate coupling between optical modes at the interface between photonic chips and free space is required for the development of many on-chip devices. This control is critical in quantum technologies where large-diameter beams with designed mode profiles are required. Yet, these designs are often difficult to achieve at shorter wavelengths where fabrication limits the resolution of designed devices. In this work we demonstrate optimized outcoupling of free-space beams at 461 nm using a meta-grating approach that achieves a 16 dB improvement in the apodized outcoupling strength. We design and fabricate devices, demonstrating accurate reproduction of beams with widths greater than 100 µm.