Frequency splitting of degenerate spherical cavity modes: stimulated Raman scattering spectrum of deformed droplets.

High-resolution interferometric spectra of the stimulated Raman scattering (SRS) spectra from flowing ethanol droplets are presented. The linewidths of the SRS peaks are less than 0.005 cm(-1), and the equal frequency spacings of the SRS peaks are an order of magnitude smaller than the spacings for morphology-dependent resonances of a perfect sphere. The observed results from droplets that are deformed by inertial effects are consistent with T-matrix and perturbation predictions of frequency splitting into the various azimuthal modes of a (2n + 1)-degenerate morphology-dependent resonance with angular momentum n in a perfect sphere.

[1]  Andreas Acrivos,et al.  On the deformation and drag of a falling viscous drop at low Reynolds number , 1964, Journal of Fluid Mechanics.

[2]  R. Chang,et al.  Stimulated Raman scattering from individual water and ethanol droplets at morphology-dependent resonances. , 1985, Optics letters.

[3]  R. Chang,et al.  Laser emission from individual droplets at wavelengths corresponding to morphology-dependent resonances. , 1984, Optics letters.

[4]  S. C. Hill,et al.  Fine structures in the angular distribution of stimulated Raman scattering from single droplets. , 1991, Optics letters.

[5]  D. E. Spock,et al.  Electric-field-modulated light scattering near a morphological resonance of a trapped aerosol particle. , 1990, Optics letters.

[6]  Richard K. Chang,et al.  Generation and suppression of stimulated Brillouin scattering in single liquid droplets , 1989 .

[7]  Young,et al.  Time-independent perturbation for leaking electromagnetic modes in open systems with application to resonances in microdroplets. , 1990, Physical review. A, Atomic, molecular, and optical physics.

[8]  H. M. Lai,et al.  Dielectric microspheres as optical cavities: Einstein A and B coefficients and level shift , 1987 .

[9]  G. Schweiger.  Observation of input and output structural resonances in the Raman spectrum of a single spheroidal dielectric microparticle. , 1990, Optics letters.

[10]  P. Barber,et al.  Laser-induced shape distortions of flowing droplets deduced from morphology-dependent resonances in fluorescence spectra. , 1985, Optics letters.