Q-plates with a nonlinear azimuthal distribution of the principal axis: application to encoding binary data

Area of Science:

• Optics and Photonics
• Information Optics

Background:

• Traditional q-plates feature optical axis orientation linearly dependent on azimuthal angle.
• Nonstandard q-plate designs offer potential for advanced optical functionalities.

Purpose of the Study:

• To investigate q-plates with spatially varying, nonlinear principal axis orientations.
• To propose and demonstrate a novel method for binary data encoding using q-plates.

Main Methods:

• Encoding q-plates with inverse-tangent and piecewise linear/flat azimuthal dependencies.
• Utilizing a spatial light modulator system for flexible q-plate pattern generation.
• Experimental validation of the proposed q-plate designs and data encoding method.

Main Results:

• Demonstrated successful encoding of q-plates with nonlinear azimuthal axis distributions.
• Showcased a new binary data encoding scheme based on piecewise linear/flat axis segments.
• Verified the capability of spatial light modulators to create exotic q-plate configurations.

Conclusions:

• Nonlinear q-plate designs are feasible and can be generated using spatial light modulators.
• The proposed piecewise linear/flat axis method offers a novel approach for binary data encoding in vector beams.
• This work expands the design space for q-plates and their applications in optical information processing.