Whispering-gallery wave known as surface plasmons has been demonstrated in the form of whispering-gallery waves, and likewise for exciton-polaritons in semiconductors. Galleries simultaneously containing both acoustic and optical whispering-gallery waves have also been made, exhibiting very strong mode coupling and coherent effects. Hybrid solid-fluid-optical whispering-gallery structures have been observed as well. Whispering-gallery wave Whispering-gallery waves, or whispering-gallery modes, are a type of wave that can travel around a concave surface. Originally discovered for sound waves in the whispering gallery of St Paul’s Cathedral, they can exist for light and for other waves, with important applications in nondestructive testing, lasing, cooling and sensing,
Art Gallery Building name of the building. Over time, the second floor space was occupied by photographic studios operated by Arthur Swain, G. T. Stephens, D. C. Moyer, among others up until the 1920. A series of pharmacies occupied the first floor until the 1960s. A fire in 1970 destroyed some of the lower floor trim. The Art Gallery Building is a two-story narrow-fronted red brick, Italianate commercial building, with a roof that slants slightly downward toward the back. The building is located adjacent to a small alleyway. The cast iron facade contains an arcade-like set of round-head windows topped by faux masonry.