arXiv subjects

Hrvoje Skenderović

Publications and source records attributed to Hrvoje Skenderović.

3 recordsLinked to original sources

arXiv2025

Probing Optical Vortex Beams via a Controllable Anisotropic Diffractive Phase Element

In this work, we investigate the diffraction of optical vortex beams through a tunable elliptical Fresnel phase mask (TEFPM). The resulting diffraction patterns are influenced by both the topological charge of the beam and the ellipticity of the mask, exhibiting characteristic intensity distributions that allow direct determination of the magnitude and sign of the topological charge. Requiring only a single controllable parameter, the TEFPM offers a simple and adaptable approach for vortex charge characterization, with a reduced detection distance that supports optical system compactness. The experimental results are confirmed by the exact analytical solutions.

physics.optics↗

arXiv2023

Digital Holographic Interferometry for Micro-Deformation Analysis of Morpho Butterfly Wing

In this study, we present a detailed analysis of deflections in a butterfly wing utilizing digital holographic interferometry. Our methodology revolves around an off-axis lensless Fourier holographic setup, and we employ laser excitation to induce deflections in the object. The implementation of a digital holographic interferometry setup, tailored for rapid monitoring of micro-deformation, is a central aspect of the research. We offer an overview of the theoretical foundations of this technique, complemented by both experimental and simulated tests aimed at validating our findings. Significantly, our investigation focuses on the detailed analysis of the micro structures found on the wing of the Morpho butterfly. The insights garnered from our study not only affirm the precision and potential of this methodology but also shed light on promising avenues for further exploration, especially in the domain of high-precision deflection sensing and its diverse applications.

physics.optics↗

arXiv2023

Quantum holography with single-photon states

The retrieval of the phase with single-photon states is a fundamental and technical challenging endeavor. Here we report the first experimental realization of hologram recordings with heralded single-photon illumination and continuous observation of photon statistics. Thereby, we demonstrate the basic principle of holography with single-photon states which cannot be described with the classical wave theory. Under conditions with illumination more than 200 times weaker than the noise of the detector, a hologram (interferogram) recorded with a heralded single-photon source revealed an object not visible with non-heralded illumination and slightly higher intensity. The dramatic improvement in retrieval of amplitude and phase information achieved with the heralded single-photon source can be explained by the strong suppression of noise due to the nonclassical temporal correlation between twin photons and the small coincidence time window. The method could be useful for recording and retrieving of amplitude and phase information in the presence of strong noise, for covert imaging, and for imaging of photosensitive biological and material samples.

quant-ph↗