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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Interference of conically scattered light in surface plasmon resonance
1Laboratory of Nanophotonics & Biosensing, Max Planck Institute for the Science of Light, Erlangen, Germany. aaron.webster@mpl.mpg.de
Optics Letters
|February 6, 2013
Summary
Researchers observed a new interference pattern in scattered light from surface plasmon polaritons. This self-interference phenomenon, without specular reflection, has potential for advanced biosensing applications.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
- Nanotechnology
Background:
- Surface plasmon polaritons (SPPs) on thin metal films are typically studied using prism coupling, like the Kretschmann attenuated total reflection (ATR) configuration.
- Excitation of SPPs is crucial for various optical phenomena and applications.
Purpose of the Study:
- To describe a novel interference pattern observed in conically scattered light from SPPs.
- To analyze the self-interference of scattered SPPs without contributions from specular reflection.
Main Methods:
- Utilizing a prism coupled geometry (Kretschmann ATR configuration).
- Illuminating the thin metal film with a focused beam.
- Analyzing the conically scattered light and its interference patterns.
- Applying Fourier optics to describe the spatial evolution of the field.
Main Results:
- Observation of a novel interference pattern in the conically scattered light.
- Identification of conditions leading to self-interference of scattered SPPs.
- Demonstration that the interference occurs without contributions from specular reflection.
Conclusions:
- The observed interference pattern provides new insights into SPP behavior.
- The phenomenon is explained using Fourier optics.
- This finding has potential applications in developing highly sensitive surface plasmon-based biosensors.
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