The simulation of 3-D grating structures is being considerably enhanced in the forthcoming version of VirtualLab™. Real 3-D grating structures are used more and more extensively for the design of optical components. The rigorous simulation techniques provided by VirtualLab™ give an insight to the optical performance of those gratings and support the design process in this way.
In VirtualLab™ 4.9 (release scheduled for September 2010) the grating structures can be defined by so called stacks. A stack is described by an arbitrary, sequence of possibly overlapping interfaces with homogeneous and inhomogeneous media in between. Interfaces and media can be loaded from catalogs. For example, typical gratings as rectangular, sinusoidal and sawtooth grating but also aspherical, polynomial and programmable interfaces are available. Media include homogeneous media, gradient index media, the pillar medium and the programmable medium.
