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65119 The exploding photonics and telecommunication industry requires universal design software. Especially needed is the simulation of two-dimensional beam propagation effects in complex photonic devices involving heterogeneous optical materials, with or without non-linear properties, and with device feature sizes from sub-wavelength to thousands of wavelengths. Most available simulation software is custom designed for specific physics models. This project will develop a unique simulation and modeling software system with which various photonic devices can be designed and analyzed. A kernel with intrinsic built-in function routines will interface with various physics modules and active controls will allow for software expansion. In Phase I, the feasibility of the proposed universal photonic device design and simulation software system will be demonstrated. A kernel and graphic user interface software will be developed and interfaced with two physics modules for linear and nonlinear waveguide structures. Commercial Applications And Other Benefits as described by awardee: Universal photonic device simulation software should find a wide range of applications in the design of photonic and optical communication devices including waveguide modulators, optical switches, photonic bandgap devices, integrated optics, micro-optic systems, diffractive optics, and microelectro-optomechanical systems.