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Transmission-line model to design matching stage for light coupling into two-dimensional photonic crystals

Miri, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1364/OL.35.000115
  3. Abstract:
  4. The transmission-line analogy of the planar electromagnetic reflection problem is exploited to obtain a transmission-line model that can be used to design effective, robust, and wideband interference-based matching stages. The proposed model based on a new definition for a scalar impedance is obtained by using the reflection coefficient of the zeroth-order diffracted plane wave outside the photonic crystal. It is shown to be accurate for in-band applications, where the normalized frequency is low enough to ensure that the zeroth-order diffracted plane wave is the most important factor in determining the overall reflection. The frequency limitation of employing the proposed approach is explored, highly dispersive photonic crystals are considered, and wideband matching stages based on binomial impedance transformers are designed to work at the first two photonic bands
  5. Keywords:
  6. Electromagnetic reflection ; Frequency limitation ; Impedance transformers ; In-band ; Light couplings ; Model-based ; Normalized frequencies ; Photonic bands ; Plane wave ; Reflection coefficients ; Transmission line models ; Transmission-line ; Two-dimensional photonic crystals ; Wide-band interference ; Wideband matching ; Communication channels (information theory) ; Elastic waves ; Electric lines ; Light transmission ; Reflection ; Photonic crystals
  7. Source: Optics Letters ; Volume 35, Issue 2 , 2010 , Pages 115-117 ; 01469592 (ISSN)
  8. URL: https://www.osapublishing.org/ol/abstract.cfm?uri=ol-35-2-115&origin=search