OASIS 7 – Exhibition on Optics and Electro-Optics Documents
Thank you for taking part in our events during and besides OASIS 7 – International Conference and Exhibition on Optics and Electro-Optics. Below you may find our slides, talks and posters for downloading.
Seminar
VirtualLab Fusion Technology and Applications: Interferometry, Microscopy and Fiber Coupling
Participants discovered the Fast Physical Optics concept with VirtualLab Fusion by means of seminar modules on technology and different applications. After a brief insight into the theory and the different electromagnetic modeling techniques we discussed the application fields of interferometry, microscopy and fiber coupling.
Talks
A k-domain method for fast propagation of electromagnetic fields through graded-index media
Graded-index (GRIN) media are widely used to model different situations: some components are designed specifically for GRIN modulation, e.g., multi-mode fibers, optical lenses or acousto-optical modulators; on the other hand, we might also talk of undesired effects where the refractive-index variation is due to stress or heating; there are also some natural effects which exhibit GRIN behavior, e.g., air turbulence or biological tissue. In this work we offer a k-domain-based method for the fast calculation of fields propagating through GRIN media. It is potentially fast because of two reasons: (1) in the k domain, Maxwell’s equations for GRIN media become ordinary differential equations, so that we can take advantage of Runge-Kutta-type mathematical approaches to reduce the numerical effort; (2) taking advantage of fast Fourier transform algorithms to convert the convolution-type calculation (O(N2)) into a multiplication (O(N)).
Optimization of Coupling Gratings for Lightguide-Based Displays
Recently, lightguide-based display devices are drawing growing interest, and one of the key technologies of such devices is the coupling gratings for the lightguides. In this work, we start with the optimization of coupling gratings for a single incident direction and analyze the effect when such optimized gratings are used in different situations. By that, it will be shown that getting uniformly high efficiencies over a wide field of view (FOV) is very challenging. Next, we analyze the situation of lightguide coupling in the spatial-frequency domain and present the possible strategies and freedom in the design. Finally, we present a complete optimization example for a desired FOV and evaluate the optimized uniformity in the diffraction efficiencies.
Poster Presentations
Modeling of Diffractive/Meta-Lenses using Fast Physical Optics
The growing importance of diffractive and meta-lenses in modern optical systems makes it vital to investigate and understand their capabilities. They play an important role in various applications like imaging systems, laser-beam shaping, bio/medical-optics, etc. A diffractive or meta-lens can be modeled as a series of structures functioning locally (e.g. local gratings) on a base interface. Each local structure introduces a certain local phase modulation, and by putting all of them together, the lens functionality can be achieved.
Vectorial physical-optics modeling of interaction of tightly focused beam with nanoparticle
Recently, lightguide-based display devices are drawing growing interest, and one of the key technologies of such devices is the coupling gratings for the lightguides. In this work, we start with the optimization of coupling gratings for a single incident direction and analyze the effect when such optimized gratings are used in different situations. By that, it will be shown that getting uniformly high efficiencies over a wide field of view (FOV) is very challenging.