Publications by Demetri Psaltis

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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 ...

The invention concerns a light filter comprising a plate defined by a length along a direction x, a width along a direction y and a height along a direction z said plate including at least one chamber containing Liquid Crystals (LC) molecules and which is ...

A retinal projector system, comprising a coupling means, a spacial light modulator, and a tapered optical waveguide having an input side surface and an output side surface, whereby the input side surface is larger than the output side surface, the coupling ...

We review our recent work on poly(dimethylsiloxane) (PDMS)-based optofluidic dye lasers using a guided wave distributed feedback (DFB) cavity. We show experimental results of single-mode operation, an integrated laser array, multiple color dye lasing, mech ...

The authors describe electroactive microwells which exploit highly localized electrokinetic effects in order to actively concentrate, confine, store, and reject particles in well defined geometries. In this letter the authors present experimental results d ...

Multimode fibers with a diameter of 100 mu m can support more than 100,000 modes. It is possible to use these degrees of freedom to transmit images with the comparable number of degrees of freedom. ...

We experimentally demonstrate a hybrid optical-digital neural network utilizing a high-dimensional nonlinear optics system. Precise digital modelling enables the system to achieve competitive performance in machine learning tasks. ...

A method for visualizing structures inside a cochlea, comprising the steps of irradiating a cochlear bone with a first laser light to ablate portions of the cochlear bone, to form a thinned area of the cochlear bone, and imaging intracochlear structures by ...

An endoscopic device for photoacoustic imaging, including a multimode optical fiber having a distal end and a proximal end, a light source to provide a light beam to the proximal end of the multimode optical fiber, a transducer to capture acoustic waves th ...

Optically controlled fluidic valves are utilized to concentrate and detect bacteria, selectively switch the pathway of the bacteria, and demonstrate bidirectional fluidic flow within a microfluidic channel. (C) 2009 Optical Society of America ...

The images produced by multicore endoscopes are pixe-lated, and their resolution is limited by the core-to-core spacing. Lenses can be used to improve the resolution, but this reduces the field of view proportionally. Lensless endoscopy through multicore f ...

We present optical tomography methods for a 3D refractive index reconstruction of weakly scattering objects using LED light sources. We are able to record holograms by minimizing the optical path difference between the signal and reference beams while sepa ...

We present an optofluidic memory architecture that enables the reading and erasing of multiple bit information packages on single light diffraction limited data marks by exploiting spectral and intensity multiplexing of colloidal quantum dot cocktails. © 2 ...

A drop delivery system comprising a light source; an optical waveguide bringing light from the light source; and a liquid supplying means configured to bring a liquid at a tip of the optical waveguide, wherein the light source and the optical waveguide are ...

We demonstrate the three-dimensional imaging capability of harmonic holographic microscopy by using the second harmonic generation from BaTiO3 nanoparticles as the signal. Three-dimensional distributions of the BaTiO3 nanoparticles in biological cells are ...

Identifying intracellular organelles within the 3D label-free tomograms of cells’ refractive indexes recorded in flow cytometry is challenging. Here we present a method for the 3D statistical segmentation of nuclei and vacuoles in flowing cells. ...

The ability to see inside the body noninvasively is indispensable in modern biology and medicine. Optical approaches to such abilities are of rapidly growing interest because of their nonionizing nature and low cost. However, the problem of opacity due to ...

The synergetic integration of photonics and microfluidics has enabled a wide range of optofluidic devices that can be tuned based on various physical mechanisms. One such tuning mechanism can be realized based on the elasticity of polydimethylsiloxane (PDM ...

Demetri Psaltis

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Physics-informed neural networks for diffraction tomography

Light filter and method for using such filter

System and method for a retinal projector based on a scattering reflector

Optofluidic distributed feedback dye lasers

Trapping and storage of particles in electroactive microwells

Image Transmission Through Multimode Fibers

Modelling and Integrating Nonlinear Optical Transformations in Neural Networks

A device and method for increased light transmission through cochlear bone by laser ablation for in situ intracochlear imaging

Minimally Invasive Optical Photoacoustic Endoscopy with a Single Waveguide for Light and Sound

Bacteria manipulation with optically controlled fluidic valves

Calibration-free imaging through a multicore fiber using speckle scanning microscopy

Optical Diffraction Tomography Using Nearly In-Line Holography with a Broadband LED Source

Spectrographic fluidic memory using electroactive nanowell arrays

Compact Drop-on-Demand Apparatus Using Light Actuation Through Optical Fibers

Harmonic Holographic Microscopy Using Nanoparticles as Probes for Three-Dimensional Cell Imaging

Spatial self-beam cleaning in spatiotemporally mode-locked fiber lasers

Computational segmentation of nuclei and vacuoles based on statistical inference for tomographic phase microscopy in flow cytometry

Seeing through turbidity with harmonic holography [Invited]

Elastomer based tunable optofluidic devices

High-resolution microfabrication through a graded-index multimode optical fiber