Superresolving second-order correlation imaging using synthesized colored noise speckles

TL;DR

This paper introduces a new method to generate specialized speckles with blue noise spectra, enabling superresolution in second-order correlation imaging that surpasses traditional limits without complex higher-order correlations.

Contribution

The authors propose a novel speckle synthesis technique using amplitude modulation to achieve superresolution in second-order correlation imaging, surpassing the diffraction limit.

Findings

Achieves more than three times higher resolution than first-order imaging.

Comparable to ninth order correlation imaging with thermal light.

Enables superresolution without complex higher-order correlations.

Abstract

We present a novel method to synthesize non-trivial speckles that can enable superresolving second-order correlation imaging. The speckles acquire a unique anti-correlation in the spatial intensity fluctuation by introducing the blue noise spectrum to the input light fields through amplitude modulation. Illuminating objects with the blue noise speckle patterns can lead to a sub-diffraction limit imaging system with a resolution more than three times higher than first-order imaging, which is comparable to the resolving power of ninth order correlation imaging with thermal light. Our method opens a new route towards non-trivial speckle generation by tailoring amplitudes of the input light fields and provides a versatile scheme for constructing superresolving imaging and microscopy systems without invoking complicated higher-order correlations.