* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Coupled Resonator Optical Waveguides (CROWs) Fatemeh Soltani
Optical amplifier wikipedia , lookup
Surface plasmon resonance microscopy wikipedia , lookup
Ellipsometry wikipedia , lookup
Atmospheric optics wikipedia , lookup
Photon scanning microscopy wikipedia , lookup
Optical rogue waves wikipedia , lookup
Retroreflector wikipedia , lookup
Nonlinear optics wikipedia , lookup
3D optical data storage wikipedia , lookup
Interferometry wikipedia , lookup
Dispersion staining wikipedia , lookup
Fiber-optic communication wikipedia , lookup
Magnetic circular dichroism wikipedia , lookup
Nonimaging optics wikipedia , lookup
Optical tweezers wikipedia , lookup
Optical coherence tomography wikipedia , lookup
Passive optical network wikipedia , lookup
Coupled Resonator Optical Waveguides (CROWs) Fatemeh Soltani, McGill University, Montreal [email protected] Montivation: CROW can be combined of different type of resonators coupled to each other such as ring resonators and FabryPerot. These coupled waveguides can make a new type of resonating waveguide with much more flexibility to use in optical layouts. Engineering the properties of CROW is more convenient and ultra-slow group velocities brings some new applications for delay lines, optical memories and in all-optical switching. As part of my PHD project I am focused on use of polymer materials in optical switching, so as the measurement of a CROW interferometer realized in polymer material, it can give me some directions toward my project. Figure 1: An Illustration of CROW [1] Also propagation of light in a CROW can be analyzed and different properties like loss in rings are testable. Figure 2: Travelling wave in a finite CROW [1] Analytical characterization: Dispersion relations can be improved by higher number of ring resonators. It has been shown in graph below: Figure 3: Exact dispersion relations There is a good trade-off between delay and bandwidth of CROWS. For more number of CROWs the higher the transmission the lower the delay. This will cause use of higher bandwidth. Figure 4: Tradeoff of CROWs [1] My Suggestion for design: I would like to work on different combination of CROWs with different geometries and different combinations such as below: Figure 5: Different designs Design Challenges: As I get feedbacks, CROWs are sensitive to fabrication. So I may consider to use disks instead of ring due to lower loss. Having ellipse in design may be good but it will have slightly higher loss. I am planning to make different variation of rings or disks as 1, 2, 3, 5, 10, 20, 50. Packing methods also need to be considered. References: [1] Scheuer, G. T. Paloczi, J. K. S. Poon and A. Yariv, “Coupled Resonator Optical Waveguides: Towards Slowing and Storing of Light”, Opt. Photon. News, Vol. 16 (2005) 36 [2] Michael L. Cooper et. al, “Quantitative infrared imaging of silicon-oninsulator microring resonators”, Optics Letters / Vol. 35, No. 5 / March 1, 2010