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Related Experiment Videos

Reflectionless tunneling of light in gradient optics.

Alexander B Shvartsburg1, Guillaume Petite

  • 1Central Design Bureau for Unique Instrumentation of the Russian Academy of Science, Butlerov Strasse 15, 117342 Moscow, Russia.

Optics Letters
|April 22, 2006
PubMed
Summary

We demonstrate reflectionless tunneling of electromagnetic waves through specific thin films. This novel approach allows for total transmission of wave intensity, overcoming typical signal loss.

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Area of Science:

  • Physics
  • Optics
  • Electromagnetism

Background:

  • Electromagnetic wave propagation through thin films is crucial for various optical and microwave applications.
  • Standard thin film designs often result in significant wave attenuation due to reflection, limiting transmission efficiency.

Purpose of the Study:

  • To investigate the tunneling properties of electromagnetic waves through thin films with a specific refractive index profile.
  • To explore the potential for achieving reflectionless tunneling, enabling complete wave transmission.

Main Methods:

  • Analysis of electromagnetic wave propagation through thin films.
  • Modeling of wave behavior with a specific refractive index profile below a cutoff frequency.
  • Comparison with traditional square index profiles.

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Main Results:

  • Identified a specific index profile that enables reflectionless tunneling.
  • Demonstrated that unlike square profiles, this design minimizes wave reflection.
  • Achieved total transmission of incoming wave intensity.

Conclusions:

  • Thin films with tailored index profiles can facilitate perfect transmission of electromagnetic waves.
  • This research offers a pathway to overcome reflection-induced losses in optical and microwave devices.
  • The findings have implications for advanced wave manipulation and device design.