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Published on: November 30, 2012
Coherence-polarization mixing in resonance gratings
Ismo Vartiainen1, Toni Saastamoinen, Jani Tervo
1University of Eastern Finland, Department of Physics and Mathematics, Joensuu, Finland. ismo.vartiainen@uef.fi
Optics Letters
|February 3, 2012
Summary
Resonance gratings can transfer spatial correlation to polarization in fully polarized light. This occurs because one polarization component couples into a leaky waveguide mode, causing a phase delay, while the other reflects.
Area of Science:
- Optics and Photonics
- Diffraction Theory
- Waveguide Optics
Background:
- Spatial correlation and polarization are key properties of light.
- Controlling these properties is crucial for optical applications.
- Resonance gratings offer unique light-matter interaction capabilities.
Purpose of the Study:
- To demonstrate the transfer of partial spatial correlation to partial polarization.
- To investigate this phenomenon using fully polarized incident light.
- To explore the underlying physical mechanisms.
Main Methods:
- Rigorous diffraction theory was employed.
- Numerical simulations utilized a Gaussian Schell-model beam.
- Grating analysis was performed using the rigorous Fourier modal method.
Main Results:
- Resonance gratings can induce partial polarization from fully polarized light.
- Selective coupling of orthogonal polarization components into leaky waveguide modes was observed.
- Significant phase delays were achieved for coupled components, while others were reflected.
Conclusions:
- Resonance gratings provide a novel method for manipulating light polarization and spatial correlation.
- The selective coupling mechanism offers precise control over polarization states.
- This finding has potential implications for optical sensing and information processing.
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