(a) Schematic diagram of an origami structure. (b) Reversible folding and unfolding of the origami structure exposed to continuous-wave (CW) NIR light. (c) Reversible closing and opening motion of a Venus flytrap-inspired gripper exposed to CW NIR light. (d) Schematic diagram of an inchworm walker device. (e) Schematic diagram of a ratcheted wood substrate. (f) The inchworm walker crawling up the wood substrate at a 50° incline exposed to on and off cycles of CW NIR light. Reprinted with permission from Ref. [49].