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Updated: May 20, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Refraction-based photonic crystal diode
Ahmet Cicek1, Melike B Yucel, Olgun Adem Kaya
1Department of Physics, Faculty of Arts and Sciences, Mehmet Akif Ersoy University, 15100 Burdur, Turkey.
Optics Letters
|July 25, 2012
Summary
This study demonstrates unidirectional light transmission in a novel photonic crystal system. The design achieves efficient light control, paving the way for advanced optical devices.
Area of Science:
- Photonics
- Condensed Matter Physics
- Materials Science
Background:
- Photonic crystals offer unique light manipulation properties.
- Controlling light propagation direction is crucial for optical device miniaturization.
- Interfaces between photonic crystals can exhibit novel transport phenomena.
Purpose of the Study:
- To numerically demonstrate unidirectional light transmission.
- To investigate the role of scatterer radii and crystal interfaces.
- To achieve efficient light control within specific frequency bands.
Main Methods:
- Numerical simulation using the plane wave expansion method for band structure analysis.
- Finite-difference time-domain simulations for transient behavior investigation.
- Design of a system with two square photonic crystals with varying scatterer radii.
Main Results:
- Unidirectional light transmission achieved along the ΓX direction.
- Transmission occurs over two adjacent stop bands.
- High contrast ratios (up to 0.9) obtained within the lower stop band.
- Forward transmission circumvented by wave vector scaling and surface normal rotation.
Conclusions:
- The proposed photonic crystal interface effectively facilitates unidirectional light transmission.
- The system demonstrates potential for creating efficient optical diodes and switches.
- Precise control over light propagation is achievable through structural modifications.
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