Spectral control of broadband light through random media by wavefront shaping

TL;DR

This paper demonstrates how wavefront shaping can be used to control and tailor the spectral response of broadband light passing through a random medium, enabling precise spectral filtering.

Contribution

It introduces a method to implement arbitrary spectral responses in random media using wavefront shaping, with experimental validation for narrow and dual-band filtering.

Findings

Successfully achieved narrow band filtering with 5.5nm resolution

Demonstrated dual-band spectral control

Validated spectral filtering through experimental results

Abstract

A random medium can serve as a controllable arbitrary spectral filter with spectral resolution determined by the inverse of the interaction time of the light in the medium. We use wavefront shaping to implement an arbitrary spectral response at a particular point in the scattered field. We experimentally demonstrate this technique by selecting either a narrow band or dual bands with a width of 5.5nm each.