Continuously Axis-Varying Polaroid for Power-Free Transmittance Tunable Glass

The ability to continuously alter the light transmittance through a window is significant for many optoelectronic devices. However, such versatility usually comes with additional unwanted power consumption. Here, we demonstrate transmittance-tunable glass that operates without electrical power. The key element to the device is an axis-varying polarizer, which combines a photoalignment technique wi...