Person
Demetri Psaltis
Related publications (410)
Stain-free identification of cell nuclei using tomographic phase microscopy in flow cytometry
Demetri Psaltis, Joowon Lim, Daniele Pirone
The accurate identification of the three-dimensional quantitative shape of a cell nucleus is now possible without fluorescent staining by applying computational segmentation to refractive index tomograms recorded in the flow cytometry mode. Quantitative ph ...
NATURE PORTFOLIO2022Physics-informed neural networks for diffraction tomography
Demetri Psaltis, Carlo Gigli, Amirhossein Saba Shirvan, Ahmed Ayoub
We propose a physics-informed neural network (PINN) as the forward model for tomographic reconstructions of biological samples. We demonstrate that by training this network with the Helmholtz equation as a physical loss, we can predict the scattered field ...
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS2022Polarization-sensitive optics diffraction tomography
Demetri Psaltis, Joowon Lim, Elizabeth Elena Antoine, Amirhossein Saba Shirvan, Ahmed Ayoub
Polarization of light has been widely used as a contrast mechanism in two-dimensional (2D) microscopy and also in some three-dimensional (3D) imaging modalities. In this paper, we report the 3D tomographic reconstruction of the refractive index (RI) tensor ...
OPTICAL SOC AMER20213D reconstruction of weakly scattering objects from 2D intensity-only measurements using the Wolf transform
Demetri Psaltis, Joowon Lim, Elizabeth Elena Antoine, Ahmed Ayoub
A new approach to optical diffraction tomography (ODT) based on intensity measurements is presented. By applying the Wolf transform directly to intensity measurements, we observed unexpected behavior in the 3D reconstruction of the sample. Such a reconstru ...
OPTICAL SOC AMER2021A membrane-less electrolyzer with porous walls for high throughput and pure hydrogen production dagger
Demetri Psaltis, Steven Alexandre Schenk, Seyyed Mohammad Hosseini Hashemi, Pooria Hadikhani
Membrane-less electrolyzers utilize fluidic forces instead of solid barriers for the separation of electrolysis gas products. These electrolyzers have low ionic resistance, a simple design, and the ability to work with electrolytes at different pH values. ...
ROYAL SOC CHEMISTRY2021High speed, complex wavefront shaping using the digital micro-mirror device
Digital micro-mirror devices (DMDs) have been deployed in many optical applications. As compared to spatial light modulators (SLMs), they are characterized by their much faster refresh rates (full-frame refresh rates up to 32 kHz for binary patterns) compa ...
NATURE PORTFOLIO2021System and method for high beam quality pulse generation in mode-locked multimode fiber lasers
Demetri Psaltis, Christophe Moser, Ugur Tegin
A system and method to generate ultrashort high beam quality pulses from spatio- temporally mode-locked multimode fiber laser are described. The invention relies on engineering the intra-cavity pulse propagation in a multimode laser cavity to shape the spa ...
2021Predicting optical transmission through complex scattering media from reflection patterns with deep neural networks
Demetri Psaltis, Eirini Kakkava
Deep neural networks (DNNs) are used to reconstruct transmission speckle intensity patterns from the respective reflection speckle intensity patterns generated by illuminated parafilm layers. The dependence of the reconstruction accuracy on the thickness o ...
2021Computer generated optical volume elements by additive manufacturing
Demetri Psaltis, Christophe Moser, Niyazi Ulas Dinç, Eirini Kakkava, Joowon Lim
Computer generated optical volume elements have been investigated for information storage, spectral filtering, and imaging applications. Advancements in additive manufacturing (3D printing) allow the fabrication of multilayered diffractive volume elements ...
2020In Vitro Cytocompatibility Assessment of Ti-Modified, Silicon-oxycarbide-Based, Polymer-Derived, Ceramic-Implantable Electrodes under Pacing Conditions
Jürgen Brugger, Demetri Psaltis, Giulia Panusa, Pierrick Guy Robert Clément, Eirini Kakkava, Jongmoon Jang
Polymer-derived ceramics (PDC) have recently gained increased interest in the field of bioceramics. Among PDC's, carbon-rich silicon oxycarbide ceramics (SiOC) possess good combined electrical and mechanical properties. Their durability in aggressive envir ...
AMER CHEMICAL SOC2020