Polarization-Sensitive Digital Holographic Imaging for Characterization of Microscopic Samples: Recent Advances and Perspectives

Coppola, Giuseppe; Ferrara, Maria Antonietta

doi:10.3390/app10134520

Cited by 21 publications

(17 citation statements)

References 76 publications

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“…The lobes are visible also for coherent irradiation at single wavelengths (λ = 406, 532 and 633 nm), the effect resulting more efficient for green incoming radiation. The state of polarization (SoP) of the valve when irradiated by a He-Ne laser beam has been fully characterized by a polarization sensitive digital holographic imaging (PSDHI) technique, which allows retrieving the degree of polarization of the outcoming wave in terms of the Stokes parameters [11]. The results confirm, for red irradiation, a partial depolarization of the incoming light induced by the valve ultrastructure, confirming the lower efficiency in optical activity in this spectral window.…”

Section: Resultsmentioning

confidence: 81%

Nature engineered metasurfaces: spin-to-orbital angular momentum conversion in diatom frustules

et al. 2022

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Evolution provided, through eras, several animal, vegetal, and protist species with sub-micrometric constituent structures able to manipulate light at the nanoscale in non trivial ways. In particular, diatoms are single-celled microalgae enclosed in a porous silica shell, the frustule, perforated by regular patterns of microand nano-pores and whose functionalities comprise mechanical stability, sorting of nutrients from harmful agents and optimization of sunlight harvesting. Photonic properties of frustules include focusing, photoluminescence, and optical activity, among others. In the present work we show preliminary results concerning the ability of single valves of Arachnoidiscus ehrenbergii diatom frustules to manipulate incoming, circularly polarized radiation in such a way to generate light beams provided with orbital angular momentum (optical vortices). The combination of cross-polarization imaging in different spectral ranges, polarization sensitive digital holographic imaging (PSDHI), and interferometry allowed characterizing the valves and detecting the presence of spin-orbit coupling induced by their ultrastructure.

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Section: Resultsmentioning

confidence: 81%

Nature engineered metasurfaces: spin-to-orbital angular momentum conversion in diatom frustules

et al. 2022

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“…The detection and imaging of optical signals were investigated and reviewed in this Special Issue. In particular, two innovative imaging techniques were addressed: Polarization-sensitive Digital Holographic Imaging (PDHI) [5] and Stimulated Raman Scattering (SRS) microscopy [6].…”

Section: Detection Imaging and Spectroscopymentioning

confidence: 99%

“…Coppola and Ferrara [5] reported a review on the state of the art of PDHI techniques, focusing on the theoretical principles and important applications. The paper not only provided an exhaustive review of applications in several fields, from biology to microelectronics and micro-photonics, but also emphasized the merits of this new technique based on the interference between different polarized optical beams.…”

Section: Detection Imaging and Spectroscopymentioning

confidence: 99%

Special Issue on Recent Advances and Future Trends in Nanophotonics

Ferrara

Dardano

2022

Applied Sciences

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“…58 In this context, quantitative phase imaging methods can be exploited to extract the polarization properties of the sample simultaneously with the complex amplitude. 59 The idea of using holography for polarization-sensitive imaging was initially proposed in the 1960s by Lohmann. 60 implemented at the end of the 1990s, 61 where two mutually orthogonal reference waves were mixed with the signal wave in the three-arm interferometer; thus, the amplitude, phase, and polarization-state distributions were recovered simultaneously 62,63 Later, the generalized approach of polarizationsensitive imaging by DH in microscopy for the Jones matrix reconstruction was proposed.…”

Section: ■ Introductionmentioning

confidence: 99%

“…PLM has recently been employed to investigate the separation, counting, and identification of MPs in wastewater samples, thus demonstrating that MP birefringence could be considered a complementary detection principle . In this context, quantitative phase imaging methods can be exploited to extract the polarization properties of the sample simultaneously with the complex amplitude . The idea of using holography for polarization-sensitive imaging was initially proposed in the 1960s by Lohmann .…”

Section: Introductionmentioning

confidence: 99%

Toward an All-Optical Fingerprint of Synthetic and Natural Microplastic Fibers by Polarization-Sensitive Holographic Microscopy

et al. 2022

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Microplastic fibers from synthetic textiles have been indicated as a major source of pollution because millions of fibers are released into the environment by laundry washing. In fact, such types of microplastics usually bypass wastewater treatment processes and filters, thus reaching the oceans and other water natural reservoirs in huge quantities. Nowadays, several approaches are available for characterizing microplastics, but unfortunately, there is no unique and standard method for this aim. Among the various methodologies, several microscopy techniques such as optical microscopy (OM), scanning electron microscopy coupled with energy dispersive X-ray (SEM−EDX) analysis, or OM combined with molecular spectroscopy can be used for visual detection and measurements. Our proposal is a non-destructive method based on a digital holographic microscope in a configuration fully sensitive to the polarization of light transmitted by the fibers with a micron dimension. Our aim is to prove that the proposed approach allows for the precise characterization of synthetic and natural fibers in water. The method exploits all the advantages of digital holography such as numerical refocusing, non-invasive testing, and quantitative measurements of the complex wave field by adding access to the polarization of light that conveys meaningful information about materials. We intend to show that a unique all-optical fingerprint can be retrieved using the Jones-matrix formalism for the major classes of synthetic microfilaments used in the textile industry (i.e., polyamide 6, polyamide 6.6, polypropylene, and polyester) and for the most common natural fibers (i.e., wool and cotton) prepared according to previously developed appropriate protocols. Our results show that the proposed technology identifies new features for micron-sized fibers based on optical anisotropy through quantitative digital holography that could open future routes for automatic and all-optical identification of textile contaminants in water.

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Polarization-Sensitive Digital Holographic Imaging for Characterization of Microscopic Samples: Recent Advances and Perspectives

Cited by 21 publications

References 76 publications

Nature engineered metasurfaces: spin-to-orbital angular momentum conversion in diatom frustules

Nature engineered metasurfaces: spin-to-orbital angular momentum conversion in diatom frustules

Special Issue on Recent Advances and Future Trends in Nanophotonics

Toward an All-Optical Fingerprint of Synthetic and Natural Microplastic Fibers by Polarization-Sensitive Holographic Microscopy

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