Loading...

Improved coupled mode analysis of planar diffraction gratings

Momeni, B ; Sharif University of Technology | 2001

151 Viewed
  1. Type of Document: Article
  2. DOI: 10.1117/12.445021
  3. Publisher: 2001
  4. Abstract:
  5. An improved coupled mode approach is presented for the analysis of plane-wave interaction with a spatially periodic permittivity dielectric layer. The method consists of two parts, in the first part the eigenvalues and eigenvectors of coupled mode system of equations are corrected to reduce the inherent errors, which arise by neglecting second-order derivatives. In the second part, a scattering matrix representation of cascaded systems is used to model the effect of boundaries. The problem under consideration is a 2-D planar grating structure illuminated by a TE polarized incident wave, but the method can be applied to other grating structures such as couplers, or any other structure for which the coupled mode approximation is used, similarly. Comparisons with results obtained using alternative methods are given to verify the accuracy of proposed method
  6. Keywords:
  7. Boundary effect ; Coupled mode theory ; Diffraction gratings ; Rigorous coupled wave analysis
  8. Source: Passive Components and Transmission Systems, Beijing, 12 November 2001 through 15 November 2001 ; Volume 4581 , 2001 , Pages 68-78 ; 0277786X (ISSN)
  9. URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4581/1/Improved-coupled-mode-analysis-of-planar-diffraction-gratings/10.1117/12.445021.full?SSO=1