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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Published on: July 21, 2018

Surface plasmon polariton discrete diffraction compensation.

M Y-C Xu¹, J S Aitchison

¹Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.

|February 3, 2009

Summary

This summary is machine-generated.

We observed discrete diffraction in surface plasmon polariton waveguide arrays. Simulations predicted and experiments confirmed discrete diffraction compensation at a 2.2-degree excitation angle.

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Area of Science:

Photonics and Wave Phenomena
Plasmonics
Optical Waveguides

Background:

Surface plasmon polaritons (SPPs) enable light confinement below the diffraction limit.
Waveguide arrays are crucial for controlling light propagation in integrated photonic devices.
Discrete diffraction is a phenomenon observed in coupled waveguide systems.

Purpose of the Study:

To experimentally observe and simulate discrete diffraction in surface plasmon polariton waveguide arrays.
To investigate the effect of excitation angle on light propagation and discrete diffraction.
To demonstrate discrete diffraction compensation through controlled detuning.

Main Methods:

Fabrication and characterization of surface plasmon polariton waveguide arrays.
Optical experiments at a 1550 nm wavelength.
Two-dimensional simulations using the effective index method.
Varying the excitation angle of incident light.

Main Results:

Observation of discrete diffraction in the SPP waveguide arrays.
Simulations accurately predicted the spread of excitation in parallel waveguides.
Experimental validation of discrete diffraction compensation at a specific excitation angle (2.2 degrees).

Conclusions:

Discrete diffraction in SPP waveguide arrays can be effectively controlled.
The effective index method provides accurate predictions for these complex systems.
Precise control of excitation angle offers a method for compensating discrete diffraction.