Coherent absorption of N00N states

TL;DR

This paper demonstrates the experimental control of two-photon N00N state absorption in multilayer graphene, enabling selective photon absorption based on input phase, with potential applications in quantum spectroscopy and imaging.

Contribution

It introduces the first experimental demonstration of phase-controlled two-photon N00N state absorption in graphene, highlighting quantum regime unique features.

Findings

Selective single or two photon absorption controlled by phase

Coherent control demonstrated in multilayer graphene

Potential for applications in multiphoton quantum technologies

Abstract

Recent results in deeply subwavelength thickness films demonstrated coherent control and logical gate operations with both classical and single photon light sources. However, quantum processing and devices typically involve more than one photon and non-trivial input quantum states. Here we experimentally investigate two-photon N00N state coherent absorption in a multilayer graphene film. Depending on the N00N state input phase, it is possible to selectively choose between single or two photon absorption of the input state in the graphene film. These results demonstrate that coherent absorption in the quantum regime exhibits unique features opening up applications in multiphoton spectroscopy and imaging.