“…The strong influence of WGMs on the luminescence and Raman scattering was first studied in [6,7] and [8][9][10], respectively. Microsphere resonators have found applications as ultrasensitive mechanical [11,12], refractometric [13,14] and biological [15,16] sensors, optical waveguides [17,18], narrowband passive photonic devices such as bandpass filters [19] or add-drop devices [20,21]. They were also used to study cavity quantum electrodynamics effects [22,23].…”