Phase-conjugation of the isolated optical vortex using a flat surfaces

TL;DR

This paper introduces a robust, non-holographic method for phase-conjugating isolated optical vortices using flat surfaces, enabling wavefront reversal through specific reflection schemes with potential applications in optical manipulation and metamaterials.

Contribution

It proposes a novel, flat-surface-based phase-conjugation technique for optical vortices, utilizing specific reflection configurations for perfect wavefront reversal.

Findings

Achieves wavefront reversal of optical vortices via even reflections.

Proposes experimental setups using catseye-prism and Dove prism configurations.

Applicable to optical tweezers, atomic traps, and metamaterials.

Abstract

The robust method for obtaining the helical interference pattern due to the phase-conjugation of an isolated optical vortex by means of the non-holographic technique is proposed. It is shown that a perfect wavefront-reversal of the vortex in a linear polarization state via even number of reflections is achievable due to the turn of the photon's momentum $\vec p \approx \hbar \vec k$ with respect to the photon's orbital angular momentum projection $L_z$. The possible experimental realization is based upon $catseye-prism$ like reflections inside the confocal optical $loop$ cavity. The alternative scheme contains the Dove prism embedded in the optical $loop$ with the odd number of reflections from mirrors. This $confocal$ interferometric technique is applicable to the optical tweezers, atomic traps, Sagnac laser loops and metamaterials fabrication.