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Demetri Psaltis

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Publications associées (268)

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Optofluidic light switch enables reconfigurable solar lighting

Demetri Psaltis, Wuzhou Song

Pennwell Publ Co2013

An optical tweezer actuated, nanoaperture-grid based Optofluidic Microscope implementation method

Demetri Psaltis

We report a novel grid based Optofluidic Microscope (OFM) method where a closely spaced 2D grid of nanoapertures (diameter = 100 nm, separation = 2.5 mu m) provided patterned illumination. We achieved a one-to-one mapping of the light transmissions through ...

2007

High-fidelity optical diffraction tomography of multiple scattering samples

Demetri Psaltis, Joowon Lim

We propose an iterative reconstruction scheme for optical diffraction tomography that exploits the split-step nonparaxial (SSNP) method as the forward model in a learning tomography scheme. Compared with the beam propagation method (BPM) previously used in ...

Springer2019

Harmonic holography: a new holographic principle

Demetri Psaltis, Ye Pu, Ye Pu

The process of second harmonic generation (SHG) has a unique property of forming a sharp optical contrast between noncentrosymmetric crystalline materials and other types of material, which is a highly valuable asset for contrast microscopy. The coherent s ...

Optical Society of America2008

Chemical separations by bubble-assisted interphase mass-transfer

Demetri Psaltis

We show that when a small amount of heat is added close to a liquid-vapor interface of a captive gas bubble in a microchannel, interphase mass-transfer through the bubble can occur in a controlled manner with only a slight change in the temperature of the ...

2008

Roadmap on wavefront shaping and deep imaging in complex media

Demetri Psaltis, Christophe Moser, Babak Rahmani

The last decade has seen the development of a wide set of tools, such as wavefront shaping, computational or fundamental methods, that allow us to understand and control light propagation in a complex medium, such as biological tissues or multimode fibers. ...

IOP Publishing Ltd2022

Second-harmonic radiating imaging probes and harmonic holography

Demetri Psaltis, Ye Pu, Ye Pu

Compared with other imaging probes such as fluorescent dyes and quantum dots, second-harmonic radiating imaging probes (SHRIMPs) provide a unique ultrafast, coherent optical contrast that is free of photobleaching and emission intermittency. Using the seco ...

Spie-Int Soc Optical Engineering2016

The potentials of additive manufacturing for mass production of electrochemical energy systems

Ugljesa Babic, Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Pooria Hadikhani

Additive manufacturing has established itself as a popular and powerful tool in electrochemistry research and development. In this short review, we focus on the latest results in both 3D printing and electrochemistry communities that could potentially bene ...

ELSEVIER2020

STED imaging of green fluorescent nanodiamonds containing nitrogen-vacancy-nitrogen centers

Demetri Psaltis, Grégoire Pierre Jean Laporte

We report Stimulated Emission Depletion (STED) imaging of green fluorescent nanodiamonds containing Nitrogen-Vacancy-Nitrogen (NVN) centers with a resolution of 70 nm using a commercial microscope. Nanodiamonds have been demonstrated to have the potential ...

Optical Soc Amer2016

Device and System Having Water Microelectrolyzer Cells and Method of Using the Same

Demetri Psaltis, Christophe Moser, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino

A device having a water vapor microelectrolyzer cell including microstructured parallel electrodes where the water splitting reactions can take place, the microstructured electrodes being covered by a thin layer of solid-state ion conducting material to al ...

2016

Dispersion-Managed Soliton Multimode Fiber Laser

Demetri Psaltis, Christophe Moser, Eirini Kakkava, Babak Rahmani, Ugur Tegin

We demonstrate, to the best of our knowledge, the first spatiotemporally mode-locked dispersion-managed fiber laser. The fiber oscillator, which includes a 250 modes multimode fiber section, generates 20 nJ pulses centered at 1034 nm with 730 mW average po ...

IEEE2020

Two-photon microscopy of the mouse cochlea in situ for cellular diagnosis

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

Sensorineural hearing loss is the most common type of hearing loss worldwide, yet the underlying cause is typically unknown because the inner ear cannot be biopsied today without destroying hearing, and intracochlear cells have not been imaged with resolut ...

SPIE Society of Photo-optical Instrumentation Engineers2013

Second harmonic generating (SHG) Nanoprobes: A new tool for biomedical imaging

Demetri Psaltis, Ye Pu, Ye Pu

Cornea functions as an outermost lens and plays an important role in vision. For cornea diagnosis and treatment, a microscopic imaging system with cellular resolution and high eye safety is strongly desired. Recently, the cell morphology of corneal epithel ...

2009

Nonlinear processing with linear optics

Demetri Psaltis, Christophe Moser, Niyazi Ulas Dinç, Ilker Oguz, Mustafa Yildirim

Deep neural networks have achieved remarkable breakthroughs by leveraging multiple layers of data processing to extract hidden representations, albeit at the cost of large electronic computing power. To enhance energy efficiency and speed, the optical impl ...

Nature Publishing Group2024

Volume holograms with linear diffraction efficiency relation by (3+1)D printing

Demetri Psaltis, Christophe Moser, Niyazi Ulas Dinç

We demonstrate the fabrication of volume holograms using two-photon polymerization with dynamic control of light exposure. We refer to our method as (3 + 1)D printing. Volume holograms that are recorded by interfering reference and signal beams have a diff ...

Optica Publishing Group2024

On the implementation of nonlinearities in optical neural networks: opinion

Demetri Psaltis, Christophe Moser, Niyazi Ulas Dinç, Ilker Oguz, Mustafa Yildirim

Optical neural networks are expected to be hybrid systems for the foreseeable future combining optics and electronics. The linear portion of the system, consisting of the weighted interconnections between the neurons, can be realized optically. The nonline ...

Optica Publishing Group2024

Silicon oxide deposition for enhanced optical switching in polydimethylsiloxane-liquid crystal hybrids

Demetri Psaltis, Andreas Vasdekis, Julien Cuennet

We report an optical switch based on a diffraction grating by combining PDMS microstructures with a photo-responsive Nematic Liquid Crystal (NLC). The grating was realized via replica molding and was subsequently coated with a thin SiO layer. SiO induced a ...

2011

Complex pattern projection through a multimode fiber

Demetri Psaltis, Christophe Moser, Damien Claude-Marie Loterie, Salma Farahi

Wavefront shaping through multimode fibers has many interesting applications, such as micromanipulation and endoscopy, where the small diameter of fibers is an advantage in terms of miniaturization. However, pattern projection can suffer from deleterious i ...

Spie-Int Soc Optical Engineering2015

Imaging based interferometric pressure sensor

Demetri Psaltis, Wuzhou Song

An imaging based interferometric pressure sensor apparatus compromise a fluid pressure sensor unit (1) and an optical monitor (2). The disposable pressure sensor part comprises a rigid transparent cover plate 3 and a flexible diaphragm (4), in between form ...

2011

Pneumatically tunable optofluidic dye laser

Demetri Psaltis, Wuzhou Song

We presented a tunable optofluidic dye laser with integrated elastomeric air-gap etalon controlled by air pressure. The chip was fabricated with polydimethylsiloxane (PDMS) via replica molding. It comprises a liquid waveguide and microscale air-gap mirrors ...

2010