Optical phase cloaking of 700-nm light waves in the far field by a three-dimensional carpet cloak

TL;DR

This paper demonstrates optical phase cloaking at 700 nm using a 3D carpet cloak, advancing the field from amplitude cloaking to phase cloaking through interferometric imaging.

Contribution

It introduces the first experimental demonstration of far-field wave cloaking, focusing on light phase rather than amplitude, at optical frequencies.

Findings

Successful phase cloaking demonstrated at 700 nm

Interferometric microscopy confirms wave cloaking

Advances optical cloaking from ray to wave level

Abstract

Transformation optics is a design tool that connects geometry of space and propagation of light. Invisibility cloaking is a corresponding benchmark example. Recent experiments at optical frequencies have demonstrated cloaking for the light amplitude ("ray cloaking"). In this Letter, we demonstrate far-field cloaking of the light phase ("wave cloaking") by interferometric microscope-imaging experiments on the previously introduced three-dimensional carpet cloak at 700-nm wavelength and for arbitrary polarization of light.