How Do I Rate This?
The blue stars show the average user rating for this item. To add your own rating, move your cursor over the stars to highlight them in gold, and click to show your rating. One star highlighted is the lowest rating, all five is the highest. Once you have rated an item, your rating is added to the average.
Optimum phase mask design and implementation for coupling light between two waveguides
Date: Monday, December 2, 2013 Time: 4:00pm Location: 125 Steele – Caltech Speaker: Amir Arbabi
Planar optical elements based on sub-wavelength quasi-periodic structures enable excellent control of the phase and amplitude of free-space optical fields. These structures consist of two-dimensional patterns etched directly in a thin layer of material with a high index of refraction (such as silicon). The unprecedented phase control provided by these nano-patterns allows for simple implementation of arbitrary phase masks. These phase masks can be fabricated using standard micro-fabrication techniques and can be easily cascaded to realize complete control over the beam shape. I will present theory and design methods we developed for determining the optimum phase masks for coupling the light from one waveguide to another. I will also discuss the simulation method for the design of quasi-periodic structures, and present simulation results and our approach for integrating these nano-structures on tip of optical fibers.