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Multiband diffraction and refraction control in binary arrays of periodically curved waveguides.

Stefano Longhi1

  • 1Dipartimento di Fisica and Isituto di Fotonica e Nanotecnologie del CNR, Politecnico di Milano, Piazza Leonarda da Vinci, n32 I-20133 Milan, Italy. longhi@fisi.polimi.it

Optics Letters
|May 27, 2006
PubMed
Summary

Periodic waveguide bending controls light diffraction and refraction in multiband arrays. Resonance effects enhance or inhibit diffraction, with distinct light refraction behaviors observed for odd or even resonances, inhibiting double refraction in the latter.

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Area of Science:

  • Optics and Photonics
  • Condensed Matter Physics
  • Quantum Optics

Background:

  • Waveguide arrays are crucial for controlling light propagation.
  • Discrete diffraction and refraction phenomena are fundamental in optical systems.
  • Semiconductor superlattices exhibit quantum phenomena analogous to optical resonances.

Purpose of the Study:

  • To theoretically demonstrate control over discrete diffraction and refraction in multiband waveguide arrays.
  • To investigate the role of periodic waveguide bending in manipulating light.
  • To explore resonance effects and their impact on light propagation characteristics.

Main Methods:

  • Theoretical modeling of light propagation in periodically bent multiband waveguide arrays.
  • Analysis of resonance effects analogous to field-induced n-photon resonances.

Related Experiment Videos

  • Investigation of light refraction behavior for different resonance conditions.

    • Main Results:

    • Periodic waveguide bending effectively controls discrete diffraction and refraction.
    • Resonance effects were identified, leading to enhanced or inhibited discrete diffraction.
    • Distinct light refraction behaviors were observed for odd and even resonances.
    • Even resonances were found to quench the two-band behavior, inhibiting double refraction.

    Conclusions:

    • Periodic waveguide bending offers a method for precise control of light diffraction and refraction in waveguide arrays.
    • Resonance phenomena play a critical role in modulating light propagation, with potential applications inspired by quantum analogs.
    • The ability to inhibit double refraction via even resonances opens possibilities for novel optical functionalities.