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Nonlinear photonic structures for all-optical deflection.

Tal Ellenbogen1, Ayelet Ganany-Padowicz, Ady Arie

  • 1Department of Physical Electronics, Faculty of Engineering, University of Tel-Aviv, Tel-Aviv 69978, Israel. ellenbog@post.tau.ac.il

Optics Express
|June 11, 2008
PubMed
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Researchers developed novel photonic structures for efficient, continuous all-optical deflection using quadratic nonlinear materials. These structures enable precise control over light beams by modulating nonlinear properties, paving the way for advanced optical devices.

Area of Science:

  • Photonics
  • Nonlinear Optics
  • Materials Science

Background:

  • All-optical deflection is crucial for integrated photonic circuits.
  • Existing methods often lack continuous tunability or efficiency.
  • Quadratic nonlinear materials offer unique light-matter interaction properties.

Purpose of the Study:

  • To introduce a new photonic structure for efficient and continuous all-optical deflection.
  • To demonstrate the feasibility of 2D nonlinear coefficient modulation for beam steering.
  • To investigate the performance of these structures in stoichiometric lithium tantalite.

Main Methods:

  • Fabrication of photonic structures with 2D modulation of the nonlinear coefficient.
  • Utilizing symmetric/anti-symmetric arcs in periodic and chirped patterns.

Related Experiment Videos

  • Experimental testing using second harmonic generation in stoichiometric lithium tantalite.

    • Main Results:

    • Achieved continuous angular deflection of the second harmonic wave up to ~2.3 degrees.
    • Demonstrated continuous deflection by varying pump wavelength (1545 nm to 1536 nm).
    • Showcased continuous deflection by adjusting crystal temperature at a fixed pump wavelength.

    Conclusions:

    • The proposed photonic structures enable efficient and continuous all-optical deflection.
    • 2D modulation of nonlinear coefficients provides a versatile method for optical beam steering.
    • These findings are significant for developing advanced tunable photonic devices.