A sandwich vehicle structure for confined propagation of electromagnetic radiation within the sandwich vehicle structure, the sandwich vehicle structure comprising: at least one upper conducting plate; at least one lower conducting plate; and a core extending between the upper and lower conducting plates, the core comprising a core medium and a plurality of spaced apart core members embedded in the core medium and extending between the upper and lower conducting plates characterized in that: the core medium and the core members are comprised of different electromagnetic properties allowing for propagation of electromagnetic radiation within the core, wherein a plurality of electromagnetic pathways are formed by a plurality of the spaced apart core members; and wherein the sandwich vehicle structure further comprises either or both of the of the following: one or more electronic devices embedded in the core, the one or more electronic devices adapted to process and/or interpret information; and one or more power units embedded in the core, the one or more power units adapted to harvest electromagnetic radiation in one or more electromagnetic pathways of the core and convert the harvested electromagnetic radiation into power, wherein the sandwich vehicle structure comprises at least one of an aircraft structure, a fuselage, a wing, an aircraft floor, an interior aircraft component, a leading edge of an aircraft, a spacecraft structure, a satellite structure, a ship structure, a submarine structure, a rocket structure, a missile structure, a land vehicle structure, a military vehicle structure, and an automobile structure. at least one upper conducting plate; at least one lower conducting plate; and a core extending between the upper and lower conducting plates, the core comprising a core medium and a plurality of spaced apart core members embedded in the core medium and extending between the upper and lower conducting plates characterized in that: the core medium and the core members are comprised of different electromagnetic properties allowing for propagation of electromagnetic radiation within the core, wherein a plurality of electromagnetic pathways are formed by a plurality of the spaced apart core members; and wherein the sandwich vehicle structure further comprises either or both of the of the following: one or more electronic devices embedded in the core, the one or more electronic devices adapted to process and/or interpret information; and one or more power units embedded in the core, the one or more power units adapted to harvest electromagnetic radiation in one or more electromagnetic pathways of the core and convert the harvested electromagnetic radiation into power, one or more electronic devices embedded in the core, the one or more electronic devices adapted to process and/or interpret information; and one or more power units embedded in the core, the one or more power units adapted to harvest electromagnetic radiation in one or more electromagnetic pathways of the core and convert the harvested electromagnetic radiation into power, wherein the sandwich vehicle structure comprises at least one of an aircraft structure, a fuselage, a wing, an aircraft floor, an interior aircraft component, a leading edge of an aircraft, a spacecraft structure, a satellite structure, a ship structure, a submarine structure, a rocket structure, a missile structure, a land vehicle structure, a military vehicle structure, and an automobile structure.