Theory of coherent active convolved illumination for superresolution enhancement

• DOI: 10.1364/josab.395122
• Publication Date: 2020-07-01T13:30:08Z
• Authors: Anindya Ghoshroy; Wyatt Adams; Durdu Ö. Güney
• Keywords: 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; Physics - Optics; Optics (physics.optics)

Recently an optical amplification process called the plasmon injection scheme was introduced as effective solution to overcoming losses in metamaterials. Implementations with near-field imaging applications have indicated substantial performance enhancements even presence of noise. This powerful and versatile compensation technique, which has since been renamed a more generalized active convolved illumination, offers new possibilities improving many previously conceived metamaterial-based devices conventional systems. In this work, we present first comprehensive mathematical breakdown illumination for coherent imaging. Our analysis highlights distinctive features such selective spectral correlations, provides rigorous understanding loss process. These are achieved by auxiliary source coherently superimposed object field. The is designed three important properties. First, it correlated Second, defined over finite bandwidth. Third, amplified that selected We derive variance image spectrum show utilizing above properties can significantly improve signal-to-noise ratio resolution limit. Besides enhanced superresolution imaging, theory be potentially information or photon wide variety incoherent linear systems including those, example, atmospheric time-domain spectroscopy, ${\cal PT}$ symmetric non-Hermitian photonics, quantum computing.