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,
Willis Building (London) Tower. Willis Building (London) The Willis Building is a commercial skyscraper in London named after the primary tenant, Willis Group. It is located on Lime Street in the City of London financial district. The building was designed by Norman Foster and developed by British Land. It stands opposite the Lloyd's building and is tall, with 26 storeys. It features a "stepped" design, which was intended to resemble the shell of a crustacean, with setbacks rising at and . In total, there are of office floor-space, most of which was pre-let to the insurance broker Willis. The Willis Building was constructed