Birefringence of GaNÕAlGaN optical waveguides

Large tuning of birefringence in two strip silicon waveguides via optomechanical motion.

We present an optomechanical method to tune phase and group birefringence in parallel silicon strip waveguides. We first calculate the deformation of suspended, parallel strip waveguides due to optical forces. We optimize the frequency and polarization of the pump light to obtain a 9 nm deformation for an optical power of 20 mW. Widely tunable phase and group birefringence can be achieved by va...

Ion-exchanged glass waveguides with low birefringence for a broad range of waveguide widths.

Optical communications networks require integrated photonic components with negligible polarization dependence, which typically means that the waveguides must feature very low birefringence. Recent studies have shown that waveguides with low birefringence can be obtained, e.g., by use of silica-on-silicon waveguides or buried ion-exchanged glass waveguides. However, many integrated photonic cir...

Birefringence of GaN/AlGaN optical waveguides

Birefringence Induced in Optical Rib Waveguides By Thermal and Mechanical Stresses

In this paper a multiphysics approach to study the optical properties of integrated waveguides influenced by thermal and mechanical stress is presented. The heating and pressure effects are evaluated by means the Heat Transfer and Structural Mechanics modules respectively. Finally, the Electromagnetics Module is used in order to evaluate the optical eigenfunctions and eigenvalues.

Design, fabrication, and measurement of giant birefringence at telecommunications wavelengths in multi-slotted silicon nanophotonic optical waveguides

Giant optical birefringence has been demonstrated in multilayer polymeric thin films (delta_n=0.3), in nanostructured silicon (delta_n=0.3) and in semiconductor nanowires (delta_n=0.8). In chip-scale waveguides at telecommunications-related wavelengths (1550 nm), giant birefringence has also been observed in the silicon-air slot waveguide (delta_n=0.7). Here, we demonstrate record giant birefri...