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Updated: Jul 30, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Pulse delay and propagation through subwavelength metallic slits.
Paul N Stavrinou1, Laszlo Solymar
1Centre for Electronic Materials and Devices, The Blackett Laboratory, Imperial College London, SW7 2BX, United Kingdom. p.stravinou@imperial.ac.uk
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 3, 2004
Summary
This study investigates optical pulse transmission through 2D metallic gratings. Surface plasmon polariton (SPP) resonance causes significant pulse delay, extending beyond the grating structure.
Area of Science:
- Optics and Photonics
- Plasmonics
- Nanophotonics
Background:
- Investigating transmission properties of 2D metallic gratings at optical wavelengths.
- Utilizing subwavelength slits for significant transmission via surface plasmon polariton (SPP) and waveguide mode resonances.
Purpose of the Study:
- To analyze the transmission properties of 2D metallic gratings for Gaussian pulses.
- To quantify pulse delay and width changes due to SPP and waveguide mode resonances.
- To demonstrate the evolution of pulse delay beyond the grating structure.
Main Methods:
- Rigorous coupled wave approach (RCWA) for spectral component analysis.
- Inverse Fourier transform for temporal output pulse reconstruction.
- Poynting vector moments for pulse delay and width determination.
Main Results:
- Significant pulse delay observed, up to 256 fs for SPP resonance with a 200 fs pulse.
- Waveguide mode resonance results in a smaller delay of 32 fs.
- Pulse delay develops over distances larger than the grating, correlating with energy storage and Poynting vector vortices.
Conclusions:
- 2D metallic gratings enable significant pulse manipulation through resonant phenomena.
- SPP resonance leads to substantial temporal delays in optical pulses.
- The spatial extent of pulse delay development is a key characteristic beyond the grating dimensions.
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