Contents: (Advanced Optical Materials 20/2017)

In article number 1600751, Alon A. Gorodetsky and co-workers describe color-changing devices that are inspired by the constituent components of optically-active ultrastructures found in cephalopod skin cells.These devices are electrically controlled and exhibit distinct shifts in their reflectance and coloration due to the injection/ extraction of protons.The findings hold significance for developing novel camouflage technologies, understanding ion-transporting biological systems, and engineering improved bioelectronic platforms. All-Optical Logic DevicesAn ultralow-power all-optical logic data distributor with dual address bits, based on resonant excitation enhanced nonlinearity by upconversion radiative transfer, is realized by Xiaoyong Hu and co-workers in article number 1700360.An ultralow operating threshold control intensity is reached, an ultrafast response time is simultaneously maintained, and a high intensity contrast ratio between the output logic states "1" and "0" is achieved.This device paves the way for the realization of real-time multibit all-optical computing chips.Entering its second decade as a top tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology.