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,
South London Gallery Rossiter staged an art show of privately owned works at the Library. After this the name was changed to the Free Library and Art Gallery. In 1881, the library and gallery moved again to New Road, Battersea, and in 1887 to 207 Camberwell Road. Leading artists such as Sir Frederic Leighton, President of the Royal Academy, Edward Burne-Jones and G. F. Watts supported the institution; the Prime Minister, William Ewart Gladstone, was its first president, succeeded by Leighton in 1887. On 4 May 1891, The South London Fine Art Gallery opened in Peckham Road in a new building in the