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Nonlinear light concentrators.

Apra Pandey1, Natalia M Litchinitser

  • 1The State University of New York at Buffalo, Department of Electrical Engineering, Buffalo, New York 14260, USA. natashal@buffalo.edu

Optics Letters
|December 22, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a tunable optical device using transformation optics and Kerr nonlinearity. It acts as an axicon-like lens, with its focus adjustable by altering the electromagnetic field.

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Area of Science:

  • Optics
  • Nonlinear Optics
  • Metamaterials

Background:

  • Transformation optics enables the design of novel optical devices.
  • Kerr nonlinearity in materials allows for intensity-dependent refractive index changes.
  • Axicon-like lenses generate non-diffracting Bessel beams with a line focus.

Purpose of the Study:

  • To propose and analyze a reconfigurable cylindrical concentrator based on transformation optics.
  • To investigate the optical properties of the device when its core material exhibits Kerr nonlinearity.
  • To explore the device's behavior with different core materials, including defocusing Kerr nonlinear and negative index materials.

Main Methods:

  • Design of a reconfigurable cylindrical concentrator using transformation optics.
  • Theoretical analysis of electromagnetic field propagation within the device.
  • Numerical simulations to study the focusing and beam manipulation properties.

Main Results:

  • The device functions as an axicon-like lens with a tunable focus line when the core has focusing Kerr nonlinearity.
  • Adjusting the incident electromagnetic field allows for tuning the focus line.
  • Beam splitting is observed with defocusing Kerr nonlinearity, and localized field enhancement occurs with negative index materials.

Conclusions:

  • The proposed device offers a reconfigurable axicon-like lensing functionality.
  • The device's behavior can be controlled by the material properties of its core and the incident electromagnetic field.
  • This work opens possibilities for advanced beam shaping and optical manipulation applications.