Measuring optical transmission matrices by wavefront shaping

TL;DR

This paper presents a practical method to measure the optical transmission matrix of complex media using wavefront shaping, enabling precise control of light focusing through turbid materials.

Contribution

A new simple technique to measure the optical transmission matrix by wavefront modulation and full-field imaging, facilitating advanced wave control in complex media.

Findings

Successfully measured the optical transmission matrix

Generated multiple foci on demand

Enabled linear combination of focus points

Abstract

We introduce a simple but practical method to measure the optical transmission matrix (TM) of complex media. The optical TM of a complex medium is obtained by modulating the wavefront of a beam impinging on the complex medium and imaging the transmitted full-field speckle intensity patterns. Using the retrieved TM, we demonstrate the generation and linear combination of multiple foci on demand through the complex medium. This method will be used as a versatile tool for coherence control of waves through turbid media.