Morphology-dependent resonances (MDR’s) of solid microspheres are excited by using an optical fiber coupler. The narrowest measured MDR linewidths are limited by the excitation laser linewidth (<0.025 nm). Only MDR’s, with an on-resonance to off-resonance intensity ratio of 104, contribute to scattering. The intensity of various resonance orders is understood by the localization principle and the recently developed generalized Lorentz – Mie theory. The microsphere fiber system has potential for becoming a building block in dispersive microphotonics. The basic physics underlying our approach may be considered a harbinger for the coupling of active photonic microstructures such as microdisk lasers.
© 1995 Optical Society of America
Original Manuscript: October 12, 1994
Published: April 1, 1995
A. Serpengüzel, G. Griffel, and S. Arnold, "Excitation of resonances of microspheres on an optical fiber," Opt. Lett. 20, 654-656 (1995)