Fig. 3: Display performance analysis.
From: Flat-panel laser displays through large-scale photonic integrated circuits
a, Key display performance factors and the corresponding PIC design space. b, Simulated grating strength as a function of the SiO2 spacer layer thickness ts for R, G and B. The SiN core thickness and the AlOx grating layer thickness are fixed at 50 nm and 55 nm, respectively. c, Simulated brightness uniformity, colour uniformity and light extraction efficiency as a function of ts. The green shading represents the allowable range for brightness uniformity, min/max > 0.8. The orange shading represents the allowable range for colour uniformity, Δu′v′ < 0.01. d, Measured uniformity map of a fabricated PIC illuminator. The device size is 6.0 mm by 4.8 mm. e, Zoom-in view of the PIC emitters. f, Schematic of the grating emitters. g, Simulated far-field intensity profiles for Y-polarization (transverse to the polarizer transmission axis). The dashed circle represents the target cone angle. h, Simulated far-field intensity profiles for X-polarization (parallel to the polarizer transmission axis). i, Line, simulated PER as a function of the light collection half angle. Star, measured PER at 11° half cone angle. j, Simulated diffraction efficiency into the ghost orders. KPI, key performance indicator. Scale bars, 1 mm (d), 20 μm (e).
