摘要
Propagation of sound waves through reflections along a curved surface was first theoretically analyzed by Lord Rayleigh to explain the whispering gallery waves in St. Paul＇s Cathedral in London. Similar whispering gallery sound waves are now a popular tourist attraction at the Echo Wall of the Temple of Heaven in Beijing. Whispering gallery phenomena also exist for light waves in dielectric spheres, disks, or toroids where total internal reflection allows the light to circulate with little attenuation and interfere with itself to form optical resonances or modes. These ＂whisper- ing gallery modes＂ have found applications ranging from photonics, quantum physics, biosensing, to optical clocks [1,2].
Propagation of sound waves through reflections along a curved surface was first theoretically analyzed by Lord Rayleigh to explain the whispering gallery waves in St.Paul’s Cathedral in London.Similar whispering gallery sound waves are now a popular tourist attraction at the Echo Wall of the Temple of Heaven in Beijing.Whispering gallery phenomena also exist for light waves in dielectric spheres,
