Beam modes in complex lenslike media and resonators
نویسندگان
چکیده
منابع مشابه
Complex modes and instability of full-vectorial beam propagation methods.
Full-vectorial beam propagation methods (FVBPMs) are widely used to model light waves propagating in high-index-contrast optical waveguides. We show that the paraxial FVBPM and wide-angle FVBPMs based on diagonal Padé approximants are analytically unstable for waveguides with complex modes. The instability cannot be removed by enlarging the computational domain, increasing the numerical resolut...
متن کاملGaussian modes in high loss laser resonators.
Matrix techniques are applied to the mode analysis of laser resonators having spherical mirrors and Gaussian profiles of the mirror reflectivity. These same analytical methods provide a useful approximation to the mode and loss characteristics of conventional resonators having an abrupt discontinuity of the reflectivity. Mode selection in apertured waveguides and resonators is also discussed.
متن کاملLocalised bending modes in split ring resonators
We present band diagrams for in-plane elastic waves propagating within a doubly periodic structure involving Split Ring Resonators. From the Navier equations we derive that the lowest resonant frequencies are associated with localised bending modes solutions of a fourth order differential equation in thin bridges, which are responsible for the appearance of a low frequency stop band. Potential ...
متن کاملPetal-like modes in Porro prism resonators.
A new approach to modeling the spatial intensity profile from Porro prism resonators is proposed based on rotating loss screens to mimic the apex losses of the prisms. A numerical model based on this approach is presented which correctly predicts the output transverse field distribution found experimentally from such resonators.
متن کاملSymmetric and antisymmetric modes of electromagnetic resonators
In this paper, we numerically study a new type of infrared resonator structure, whose unit cell consists of paired split-ring resonators (SRRs). At different resonant frequencies, the magnetic dipoles induced from the two SRRs within one unit cell can be parallel or antiparallel, which are defined as symmetric and antisymmetic modes, respectively. Detailed simulation indicates that the symmetri...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Optical Society of America
سال: 1976
ISSN: 0030-3941
DOI: 10.1364/josa.66.001373