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Implementation of a Reference Interferometer for Nanodetection
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Ultra-compact branchless plasmonic interferometers.

Martin Thomaschewski1, Yuanqing Yang, Sergey I Bozhevolnyi

  • 1Centre for Nano Optics, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark. math@mci.sdu.dk.

Nanoscale
|August 18, 2018
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Summary
This summary is machine-generated.

Researchers developed a novel plasmonic interferometer for integrated optical circuits. This device enables synchronous excitation and controlled interference of light in adjacent waveguides, paving the way for advanced photonic applications.

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Area of Science:

  • Photonics and Nanotechnology
  • Plasmonics and Nanophotonics

Background:

  • Miniaturization of optical devices is crucial for applications like biosensing and quantum information processing.
  • Plasmonics enables light manipulation at the subwavelength scale, driving optical device miniaturization.

Purpose of the Study:

  • To investigate on-chip plasmonic systems for synchronous excitation of multiple inputs.
  • To examine light interference between adjacent excited plasmonic channels.

Main Methods:

  • Design and fabrication of a branchless interferometer with two parallel plasmonic waveguides.
  • Utilizing ultra-compact antenna couplers for selective or coherent excitation.
  • Quantitative characterization of total coupling efficiency and power distribution.

Main Results:

  • Demonstrated a branchless plasmonic interferometer with efficient coupling exceeding 15% for small separations.
  • Showcased dynamic control over power distribution by adjusting incident beam position.
  • Confirmed synchronous excitation and interference capabilities between adjacent channels.

Conclusions:

  • The presented plasmonic interferometer design offers a scalable approach for integrated photonic circuits.
  • This technology provides new perspectives for highly dense integrated plasmonic circuitry, optoelectronics, and sensing.
  • The design principle is adaptable to various configurations, enhancing future photonic device development.