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Jae-Woo Choi

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Publications associées (22)

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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

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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

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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

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 ...

Amer Inst Physics2016

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

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

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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

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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

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The Shockley-Queisser limit predicts a maximum efficiency of 30% for single junction photovoltaic (PV) cells. The rest of the solar energy is lost as heat and due to phenomena such as reflection and transmission through the PV and charge carrier recombinat ...

Royal Society of Chemistry2014

Electro and pressure tunable cholesteric liquid crystal devices based on ion-implanted flexible substrates

Herbert Shea, Andreas Vasdekis, Muhamed Niklaus, Jae-Woo Choi, Luc Maffli, Luciano De Sio

We report an electro-responsive and pressure sensitive device based on conductive polydimethylsiloxane (PDMS) combined with a short pitch Cholesteric Liquid Crystal (CLC). Ion-implantation and surface chemistry in PDMS enable both the induction of conducti ...

2013