Pinhole quantum ghost imaging

TL;DR

This paper introduces a lensless quantum ghost imaging method using biphotons, inspired by pinhole camera principles, where the pump beam size and crystal parameters determine the imaging resolution.

Contribution

It presents a novel lensless quantum ghost imaging scheme based on biphotons, drawing an analogy to classical pinhole cameras, and analyzes the factors affecting the effective pinhole size.

Findings

Imaging can be achieved without lenses using biphoton correlations.

The effective pinhole size depends on pump beam width, crystal thickness, and biphoton wavelengths.

The scheme simplifies quantum imaging setups by removing the need for lenses.

Abstract

We propose a quantum ghost imaging scheme based on biphotons, that, by using a collimated pump beam of the right size for biphoton generation, obviates the need for lenses to achieve imaging. The scheme is found to be analogous to the classical pinhole camera, where we show that the equivalent to the classical pinhole size depends mainly on the width of the pump beam, but also on the thickness of the nonlinear crystal and the wavelengths of the biphoton.