# Ultrahigh enhancement of light focusing through disordered media controlled by Megapixel modes

## TL;DR

This paper introduces a wavefront shaping system that leverages a Megapixel digital micro-mirror device to focus light through disordered media with an unprecedented enhancement factor over 100,000, enabling advanced imaging and energy delivery.

## Contribution

It presents a novel fast method to optimize wavefront shaping using a Megapixel device, achieving the highest enhancement factor reported to date.

## Key findings

- Achieved an average enhancement factor of 101,391
- Optimization completed within 73 minutes
- Demonstrated potential for improved imaging and energy transfer

## Abstract

We propose and demonstrate a system for wavefront shaping which generates optical foci through complex disordered media and achieves an enhancement factor of greater than 100,000. To exploit the 1 Megapixel capacity of a digital micro-mirror device and its fast frame rate, we developed a fast and efficient method to handle the heavy matrix algebra computation involved in optimizing the focus. We achieved an average enhancement factor of 101,391 within an optimization time of 73 minutes. This unprecedented enhancement factor may open new possibilities for realistic image projection and the efficient delivery of energy through scattering media.

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Source: https://tomesphere.com/paper/1701.02933