Figure 2
From: Precise and diffraction-limited waveguide-to-free-space focusing gratings
Grating design parameters. (a) Simulated α and (b) θ as a function of grating period and DC; (c) Desired local α and (d) local θ to produce the intended focus for a grating 20 μm-long along y; (e) and (f) inferred physical DC and Λ profiles to approximate the desired grating (black lines), together with polynomial fits used to specify the design.
