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Novel optical slow wave structure and surface electromagnetic wave coupler with conducting interfaces

Mehrany, K ; Sharif University of Technology | 2004

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  1. Type of Document: Article
  2. DOI: 10.1088/0268-1242/19/7/019
  3. Publisher: 2004
  4. Abstract:
  5. Recently, a group of novel devices based on conducting interfaces has been proposed. These conducting interfaces can be implemented, for example, by using the inversion layer of MOS structures, trapped charges, or depletion layer charges. It has been shown that these structures can support surface electromagnetic waves. In this paper, the coupling of surface electromagnetic waves supported by conducting interfaces is first analysed. Next, by direct solution of Maxwell's equations and applying appropriate boundary conditions; exact analytical formulation of the dispersion equation has also been derived. Results driven by a coupled mode theory approach are justified by solving the exact transcendental dispersion equation derived from the second approach. A new type of optical modulator is proposed by demonstrating that the coupling length of this structure can be programmed by applying a transverse voltage. The possibility of optical slow wave propagation in dielectric slab waveguides in the presence of conducting interfaces is also explored
  6. Keywords:
  7. Boundary conditions ; MOS devices ; Maxwell equations ; Light propagation ; Light modulators ; Electromagnetic waves ; Electromagnetic dispersion
  8. Source: Semiconductor Science and Technology ; Volume 19, Issue 7 , 2004 , Pages 890-896 ; 02681242 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/0268-1242/19/7/019/meta