Flappy Bird: The Tiny Game That Took Over Our Big Lives
There was a time when everyone you knew was either playing Flappy Bird, bragging about their score, or angrily swearing never to touch it again… only to pick it up five minutes later. If you lived through that era, you remember the chaos. If you didn’t? Buckle up.
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In this work, we took a closer look at transmissive polarization volume holograms (T-PVH) to provide clarifications on their geometry, physics, and optical responses by finite-difference time-domain (FDTD) simulation and experimental validation. First, we introduced the four possible geometries of T-PVH and simulated their optical responses in terms of diffraction efficiency, polarization selectivity, and polarization output. It is shown that the configuration we called "Slanted T-PVH (B-θ/D-θ+9," where the director is perpendicular to t