An exact transverse Helmholtz equation.
We derive an exact equation for the transverse component of the electric field propagating along a given longitudinal z direction in the presence of an isotropic refractive-index distribution n(x,y).
Crosignani
Bruno
B
Dipartimento di Fisica, Universita' dell'Aquila, 67100 L'Aquila, Italy, and Centro di Ricerca e Sviluppo SOFT.CNR, Universita' di Roma La Sapienza, 00185 Roma, Italy. bcross@caltech.edu
Di Porto
Paolo
P
Yariv
Amnon
A