Loading...

Analysis of Parameters Affecting the Behavior of Frequency Selective Devices and their Scaling to Nano Regimes

Sadeghi, Mohammad Naser | 2020

547 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53591 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Rashidian, Bijan
  7. Abstract:
  8. In this project, different types of optical frequency selector devices are compared with each other and the factors limiting their behavior (losses, throughput, quality factor, etc.) are precisely analyzed. Change this behavior in near-field and far-field scales as well as the behavior of these devices in nano-dimensions are analyzed. Also, the main theoretical and technological limitations of different types of optical filters in far-field and near-field regimes are compared. In the following, the scaling behavior of different filter families in passing to nanometric dimensions is investigated and finally the limitations of the possibility of making the selected sample are analyzed. For this purpose, the steps are done by first reviewing the previous work and comparing the types of filters reported in the far-field. In this study, limited behaviors and limiting factors of basic parameters and scaling behavior are investigated. At the end, a complete simulation of the selected sample performed in order to compare and validate the reported values. The results show the unquestionable superiority of grating tools among frequency selector tools due to their high accuracy and compatibility with other optical elements. Therefore, the general effort in most of this thesis is to recognize the full properties of optical elements in order to design correction systems for optical systems, often using diffraction. A complete design is provided to correct spherical and chromatic aberrations of refractive optical systems using holographic diffraction elements and Fresnel lenses. These corrections have been used to improve the resolution of double and triple grating spectrometers, often reducing their quality and accuracy under the influence of light-collimating and focusing elements. Demonstrated significant improvement in spectroscopy resolution results with modified element design by raytracing simulation. The main part of this research dealt with the problem of simulation of diffraction devices along with refractive elements, due to about 6 orders difference in the spatial dimensions required to study these two topics. This is considered as the bottleneck of the combined studies of geometric optical system (refraction) and field optics (diffraction). In order to overcome this difficulty, the answers of two key softwares in this field were reviewed and practical solutions were provided
  9. Keywords:
  10. Optical Filters ; Mesoscopic System ; Ray Tracing ; Frequency Aberrations ; Spherical Aberrations ; Ray Tracing Simulation ; Electromagnetic Wave Simulation ; Two Stage Spectrometer ; Three Stage Spectrometer ; Nanophotonics

 Digital Object List

 Bookmark

No TOC