V. C. Y. So
University of Toronto
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Publication
Featured researches published by V. C. Y. So.
Journal of the Optical Society of America | 1979
V. C. Y. So; R. Normandin; G. I. Stegeman
Harmonic generation of light in thin-film optical waveguides is analyzed theoretically by evaluating the total electromagnetic fields that satisfy the polarization driven wave equation and the electromagnetic boundary conditions at both interfaces. Analytical expressions are given for the amplitude of the growing wave component of the total fields. The results agree with those of normal mode analysis only in the limit of phase-matched harmonic generation. This analysis is believed to be applicable to a large range of wave interaction phenomena in integrated optics.
Solid State Communications | 1980
J. E. Sipe; V. C. Y. So; Masuo Fukui; G. I. Stegeman
Abstract The nonlinear response of a metal to optical fields is derived for a hydrodynamic model of electron dynamics. The results are used to analyse recent experiments on harmonic generation from a prism-silver film-α quartz sample.
Applied Physics Letters | 1979
R. Normandin; V. C. Y. So; G. A. Teh; G. I. Stegeman
The behavior of a number of glass and Ti in‐diffused LiNbO3 waveguides was investigated as a function of laser power, and the damage thresholds were evaluated and compared to the bulk material values.
Solid State Communications | 1979
Masuo Fukui; V. C. Y. So; J. E. Sipe; G. I. Stegeman
Abstract An analysis of the nonlinear mixing of oppositely travelling surface plasmons on a semi-infinite metal is discussed within the framework of Maxwells equations. Coupling to free-space radiation fields, and transverse bulk waves in the metal is predicted under certain conditions at the sum frequency of the two surface plasmons.
Solid State Communications | 1979
Masuo Fukui; V. C. Y. So; G. I. Stegeman
Abstract The dispersion relation and the theory of nonlinear excitation of surface exciton polaritons are presented for a geometry consisting of a prism, and airgap and a spatially dispersive medium. We compare DeMartini et al.s experimental results for the Cl-surface exciton polaritons in ZnO with the predictions of two models for the ABC (additional boundary conditions), i.e. Pex = 0 and ∂ P ex ∂ z = 0 and found reasonable agreement for the second case only.
Applied Physics Letters | 1978
V. C. Y. So; R. Normandin; G. I. Stegeman
A new theory of coherent mode interactions in integrated optics is described with particular reference to light scattering by surface waves. This analysis is characterized by exact solutions to polarization‐driven wave equations and electromagnetic boundary conditions.
Journal of Physics C: Solid State Physics | 1981
V. C. Y. So; Masuo Fukui; P J Thomas; G. I. Stegeman
The 2p yellow exciton in cuprous oxide was investigated at helium temperatures by resonant Brillouin scattering. Despite the fact that only one Stokes and one anti-Stokes peak were observed, both the polarisability alpha and damping Gamma were evaluated from measurements of the Brillouin linewidth and the Stokes to anti-Stokes intensity ratio. Comparison between experiment and the theories of the preceding paper and of Tilley (1980) and of Brenig, Zeyher and Birman (1972) was made.
Solid State Communications | 1980
Masuo Fukui; O. Toda; V. C. Y. So; G. I. Stegeman
Abstract The theory of Brillouin scattering in a prism-metal film-air (Kretschmann) geometry is analyzed and numerical estimates are given for a LaSF9 prism-Ag film-air configuration. Signal enhancement of several orders of magnitude is predicted under conditions of coupling to surface plasmon-like fields.
Surface Science | 1979
Masuo Fukui; V. C. Y. So; G. I. Stegeman
Abstract Light scattering by thermal and generated surface plasmons in thin metal films is analysed theoretically. It is shown that the scattering cross-section for thermal surface plasmons is very small, probably too small for detection with present instrumentation. However scattering from generated surface plasmons does lead to promising cross-sections.
Journal of Physics C: Solid State Physics | 1981
V. C. Y. So; J. E. Sipe; Masuo Fukui; G. I. Stegeman
A theory for resonant Brillouin scattering involving excitons in semiconductors is presented. A Green function approach is used to describe the scattering interaction and the phonons for a half-space. Numerical calculations of the spectrum are given for a range of values of the relative polarisability alpha and damping constant Gamma typical of the 2p exciton in cuprous oxide. Comparison is made with the previous work of Brenig, Zeyher and Birman (1972) and of Tilley (1980). The effects on the spectrum of two different additional boundary conditions are also explored.
