By Rita A. Sakr, Violetta Barbashina, Mary Morrogh, Sarat Chandarlapaty, Victor Andrade, Crispinita D. Arroyo, Narciso Olvera, Tari A. King
Read or Download [Article] Protocol for PTEN Expression by Immunohistochemistry in Formalin-fixed Paraffin-embedded Human Breast Carcinoma PDF
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Extra info for [Article] Protocol for PTEN Expression by Immunohistochemistry in Formalin-fixed Paraffin-embedded Human Breast Carcinoma
It represents the distance from waveguide axis at 2 which n, ~ is reduced by the amount h 22D. < a, weak guidance is well satisfied. On the other hand, depending on the rate of growth of function f(), for y > a the waveguide may be no longer weakly guiding. For instance, considering the parabolic profile, at y = 2e we have n~ reduced by the amount no8D, condi- tion of operation often not properly recommended for exploiting weak guidance simplification. These observations are particularly important for two-dimensional profiles.
Let us continue, for the sake of simplicity, the analysis of a dielectric waveguide, consisting of two homogeneous isotropic regions, characterized by a pair of refractive indices n 1 , n 2. n 2. 61), can 6n be introduced for any waveguide of this type, with k 1 and k 2 as wavenumbers, although they will not appear properly as transverse phase and attenuation constants of trigonometric or real exponential functions in the field expresGenerally, the particular field ex- sions, as occurs for a planar geometry.
The first situation is that occurring for all the families of modes in a planar waveguide. In a different geometry, characterized by an outer region completely surrounding the inner one, the second situation sometimes occurs. The definitions of normalized phase constant and power confinement factor are here given for guided modes only. They can be extended, although with some cares, to leaky modes (Snyder, Love, 1984). perty of having null or not null value of G In particular, the pro- discriminates different fami- lies of leaky modes.