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With the continued proliferation of display intensive applications for portable electronics devices, the need for lower power, higher image quality video displays has never been greater. Pixtronix is uniquely able to meet these requirements through its MEMS (micro-electo-mechanical system) display technology, which enables the development of direct view displays with breakthrough optical transmission over 60%, color gamut over 100% (of NTSC, CIE 1931), 1,000:1 contrast ratio and wide view angles.

High-efficiency, large-bandwidth silicon-on-insulator grating coupler based on a fully-etched photonic crystal structure Appl. Phys. Lett. 96, 051126 (2010); 10.1063/1.3304791Monolithically integrated low-loss silicon photonic wires and three-dimensional tapered couplers fabricated by self-profile transformation One of the key challenges facing silicon-based integrated optics is the coupling of light from standard optical fibers to submicron silicon waveguides. As a solution to this problem, we present an adiabatically tapered three-dimensional mode converter based on graytone optical lithography and silicon-on-insulator substrates. Our goal has been to preserve complementary metal-oxidesemiconductor process compatibility to the greatest extent possible. Adiabatic tapers are robust with respect to fabrication imperfections. The graytone lithography fabrication process is discussed, and results are presented from optical coupling experiments. Minimizing silicon surface roughness is critical, and methods are presented for achieving rms roughness values on the subnanometer scale.

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