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Demetri Psaltis

Publications associées (410)

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Tissue and cellular imaging

Demetri Psaltis, Ye Pu, Chia-Lung Hsieh, Xin Yang

Systems and methods for imaging ear tissue include: directing illumination radiation to pass through an intact biological structure and be incident on ear tissue that does not include an exogenous fluorophore, at a plurality of locations, the illumination ...

2013

Focusing and scanning light through a multimode optical fiber using digital phase conjugation

Demetri Psaltis, Christophe Moser, Salma Farahi

We demonstrate for the first time to our knowledge a digital phase conjugation technique for generating a sharp focus point at the end of a multimode optical fiber. A sharp focus with a contrast of 1800 is experimentally obtained at the tip of a 105 mu m c ...

2012

Three-Dimensional Mapping of Transparent Objects Using Kerr Nonlinearity Measurement

Demetri Psaltis, Alexandre Goy

We report a technique to produce three-dimensional maps of transparent objects using the Kerr coefficient as a contrast agent. The method is based on the spatial modifications of a probe pattern focused into the medium. (C) 2010 Optical Society of America ...

Ieee2012

Light filter and method for using such filter

Demetri Psaltis, Andreas Vasdekis, Julien Cuennet

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 ...

2012

Three-dimensional scanning microscopy through thin turbid media

Demetri Psaltis, Ye Pu, Chia-Lung Hsieh, Xin Yang

We demonstrate three-dimensional imaging through a thin turbid medium using digital phase conjugation of the second harmonic signal emitted from a beacon nanoparticle. The digitally phase-conjugated focus scans the volume in the vicinity of its initial pos ...

2012

Holographic coherent anti-Stokes Raman scattering bio-imaging

Demetri Psaltis

CARS holography captures both the amplitude and the phase of a complex anti-Stokes field, and can perform three-dimensional imaging by digitally focusing onto different depths inside a specimen. The application of CARS holography for bio-imaging is demonst ...

2012

Digital confocal microscope

Demetri Psaltis, Alexandre Goy

We demonstrate experimentally a scanning confocal microscopy technique based on digital holography. The method relies on digital holographic recording of the scanned spot. The data collected in this way contains all the necessary information to digitally p ...

Optical Society of America2012

Precision Intracellular Delivery Based on Optofluidic Polymersome Rupture

Demetri Psaltis, Jeffrey Alan Hubbell, Andreas Vasdekis, Conlin O'Neil

We present an optical approach for intracellular delivery of molecules contained within oxidation-sensitive polymersomes. The photosensitizer ethyl eosin is associated with the polymersome membrane to oxidatively increase the hydrophilicity of the hydropho ...

American Chemical Society2012

Coherent Anti-Stokes Raman Scattering Holography: Theory And Experiment

Demetri Psaltis

We review coherent anti-Stokes Raman scattering (CARS) holography as a non-scanning, label-free, three-dimensional imaging technique. The theory of CARS and its integration with digital holography is explored. We then discuss the experimental implementatio ...

World Scientific Publishing2012

IMAGING The fog clears

Demetri Psaltis

A technique has been developed to image a fluorescent object hiding behind a light-scattering screen without the need for a detector behind the screen. The approach could find applications in imaging biological tissue. ...

Nature Publishing Group2012