Demonstration of a highly-sensitive tunable beam displacer with no movable elements based on the concept of weak value amplification

TL;DR

This paper demonstrates a highly sensitive, tunable beam displacer that uses weak value amplification to shift a Gaussian beam's centroid without movable parts, enabling precise control via polarization.

Contribution

It introduces a novel beam displacer leveraging weak value amplification for displacement control without mechanical movement.

Findings

Centroid displacement is linearly controlled by polarization angle.

Displacement exceeds the beam width, enhancing sensitivity.

No movable optical elements are required.

Abstract

We report the implementation of a highly sensitive beam displacer based on the concept of weak value amplification that allows to displace the centroid of a Gaussian beam a distance much smaller than its beam width without the need to use movable optical elements. The beam's centroid position can be displaced by controlling the linear polarization of the output beam, and the dependence between the centroid's position and the angle of polarization is linear.