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Large electro-optic beam steering with nematicons.

Raouf Barboza¹, Alessandro Alberucci, Gaetano Assanto

¹Nonlinear Optics and OptoElectronics Lab (NooEL), Via della Vasca Navale 84, 00146 Rome, Italy.

|July 19, 2011

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We demonstrate precise angular steering of spatial solitons in nematic liquid crystals using an electro-optic response. This method achieves significant beam deflection up to 70 degrees.

Area of Science:

Nonlinear optics
Liquid crystal physics
Photonics

Background:

Spatial solitons are self-confined light beams.
Nematic liquid crystals exhibit unique electro-optic and reorientational nonlinearities.
Controlling light beam propagation is crucial for optical devices.

Purpose of the Study:

To analyze the angular steering of spatial solitons in nematic liquid crystals.
To exploit the electro-optic response and reorientational nonlinearity for beam control.
To achieve large-angle deflection of light beams.

Main Methods:

Utilizing a planar cell with comb electrodes to create a bias-induced interface.
Applying distinct voltages to control the optic axis distribution.

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Observing soliton propagation and deflection via refraction and total internal reflection.

Main Results:

Spatial solitons were steered in a plane.
Significant beam deflection was achieved by manipulating the optic axis.
An overall deflection of 70° was recorded in standard E7 liquid crystal.

Conclusions:

The proposed configuration effectively controls the angular steering of spatial solitons.
Exploiting electro-optic and reorientational effects in liquid crystals offers a viable method for large-angle beam deflection.
This technique has potential applications in optical switching and steering.