Publications de Jae-Woo Choi | EPFL Graph Search

Search for high-mass exclusive diphoton production with tagged protons in proton-proton collisions at √s=13 TeV

Matthias Finger, Qian Wang, Varun Sharma, Konstantin Androsov, Jan Steggemann, Ian Smith, Xin Chen, Rakesh Chawla, Michele De Palma, Matteo Galli

A search is presented for high-mass exclusive diphoton production via photon-photon fusion in proton-proton collisions at root s = 13 TeV in events where both protons survive the interaction. The analysis utilizes data corresponding to an integrated lumino ...

AMER PHYSICAL SOC2024

Measurement of the inclusive and differential t(t)over-bar gamma cross sections in the dilepton channel and effective field theory interpretation in proton-proton collisions at root s=13 TeV

Matthias Finger, Varun Sharma, Olivier Martin, Ian Smith, Jean-François Carlin, Arvind Shah, Rakesh Chawla, Thomas Mountford, Chao Wang, João Miguel das Neves Duarte

The production cross section of a top quark pair in association with a photon is measured in proton-proton collisions in the decay channel with two oppositely charged leptons (e(+/-)mu(-/+), e(+)e(-), or mu(+)mu(-)). The measurement is performed using 138 ...

Springer Nature2022

Thermo-optic tuning of spectral broadening in a nonlinear Ultra-Silicon-Rich Nitride grating

Jae-Woo Choi

Temperature tuning of spectral broadening induced by a nonlinear grating is experimentally demonstrated. The bandwidth is observed to decrease as temperature increases, corresponding to a red-shift in the high dispersion region of the Bragg grating. ...

IEEE2020

Efficient Solar-vapor Generation in Hollow-mesoporous Plasmonic Nanoshells

Demetri Psaltis, Thomas La Grange, Jeffrey Alan Hubbell, Jae-Woo Choi, Ye Pu, Miguel Antonio Modestino, Seyyed Mohammad Hosseini Hashemi, Marcin Stefan Zielinski

Plasmonic nanostructures have shown great promise in solar thermal applications. Here we report highly efficient solar vapor generation using hollow-mesoporous plasmonic nanoshells, where the steam production is significantly enhanced by the extended activ ...

IEEE2018

Membrane-less electrolyzer

Demetri Psaltis, Jae-Woo Choi, Miguel Antonio Modestino, Seyyed Mohammad Hosseini Hashemi

The present invention concerns a membrane-less electrolyzer comprising a fluidic channel for receiving an electrolyte fluid; a first electrode and a second electrode located inside the fluidic channel, the first and second electrode permitting to extract a ...

2016

Optofluidics of plants

Demetri Psaltis, Andreas Vasdekis, Jae-Woo Choi

Optofluidics is a tool for synthesizing optical systems, making use of the interaction of light with fluids. In this paper we explore optofluidic mechanisms that have evolved in plants where sunlight and fluidic control combine to define most of the functi ...

2016

Hollow Mesoporous Plasmonic Nanoshells for Enhanced Solar Vapor Generation

Demetri Psaltis, Thomas La Grange, Ye Pu, Jeffrey Alan Hubbell, Jae-Woo Choi, Ye Pu, Miguel Antonio Modestino, Seyyed Mohammad Hosseini Hashemi, Marcin Stefan Zielinski

In the past decade, nanomaterials have made their way into a variety of technologies in solar energy, enhancing the performance by taking advantage of the phenomena inherent to the nanoscale. Recent examples exploit plasmonic core/shell nanoparticles to ac ...

American Chemical Society2016

Ablation device and method for subsurface biological tissue ablation

Demetri Psaltis, Alexandre Goy, Jae-Woo Choi, Thomas Jean Victor Marie Lanvin

The present invention relates to a subsurface laser-induced optical breakdown (LIOB) ablation system including an optical source for providing optical pulses and an optical waveguide for guiding the optical pulses to a subsurface target biological tissue s ...

2015

Catheter for sub-surface ablation in biological tissue

Demetri Psaltis, Jae-Woo Choi, Donald Benjaman Conkey, Thomas Jean Victor Marie Lanvin

The present invention concerns a subsurface laser-induced optical breakdown (LIOB) catheter including a probe assembly for providing at least one optical pulse to a subsurface target biological tissue site; and a waveguide for guiding the at least one opti ...

2015

A micropillar array for sample concentration via in-plane evaporation

Demetri Psaltis, Jae-Woo Choi, Seyyed Mohammad Hosseini Hashemi

We present a method to perform sample concentration within a lab-on-a-chip using a microfluidic structure which controls the liquid-gas interface through a micropillar array fabricated in polydimethylsiloxane between microfluidic channels. The microstructu ...

American Institute of Physics2014