41 citations · 252 across the 16 of their papers we have counts for
16 papers
Origin, strength, and speed of the nonlinear optical response of transparent conducting oxides to single-cycle optical pulses
Ieng-Wai Un, Subhajit Sarkar, Yonatan Sivan
We present a first-principles study of the nonlinear optical response of transparent conducting oxides at the nanoscale due to excitation by intense, extremely short pulses based o…
Quantum-optical theory of the few femtosecond nonlinear optical response of Drude metals with a non-parabolic conduction band
Ieng-Wai Un, Subhajit Sarkar, Yonatan Sivan
We develop an energy-space density matrix framework to investigate the interaction of extremely short optical pulses (ESPs) with transparent conducting oxides (TCOs). This approach…
Ballistic vs. diffusive transport in metals
Yonatan Sivan, Ieng-Wai Un, Subhajit Sarkar
Using the Boltzmann transport model, we show that, somewhat unintuitively, ballistic transport of electrons in metals is weaker than diffusive transport. This happens because the f…
Crossover from non-thermal to thermal photoluminescence from metals excited by ultrashort light pulses
Y. Sivan, I. W. Un, I. Kalyan +3
Photoluminescence from metal nanostructures following intense ultrashort illumination is a fundamental aspect of light-matter interactions. Surprisingly, many of its basic characte…
An electronic-based model of the optical nonlinearity of low-electron-density-Drude materials
Ieng Wai Un, Subhajit Sarkar, Yonatan Sivan
Low electron density Drude (LEDD) materials such as indium tin oxide (ITO) are receiving considerable attention because of their combination of CMOS compatibility, unique epsilon-n…
The electronic and thermal response of low electron density Drude materials to ultrafast optical illumination
Subhajit Sarkar, Ieng Wai Un, Yonatan Sivan
Many low electron density Drude (LEDD) materials such as transparent conductive oxide or nitrides have recently attracted interest as alternative plasmonic materials and future non…
Distinguishing thermal from non-thermal ("hot") carries in illuminated molecular junctions
Yonatan Dubi, Ieng-Wai Un, Yonatan Sivan
The search for the signature of non-thermal (so-called ``hot'') electrons in illuminated plasmonic nanostructures requires a detailed understanding of the non-equilibrium electron…
Theory of Non-equilibrium "Hot" Carriers in Direct Band-gap Semiconductors Under Continuous Illumination
Subhajit Sarkar, Ieng-Wai Un, Yonatan Sivan +1
The interplay between the illuminated excitation of carriers and subsequent thermalization and recombination leads to the formation of non-equilibrium distributions for the "hot" c…
The photothermal nonlinearity in plasmon-assisted photocatalysis
Ieng-Wai Un, Yonatan Dubi, Yonatan Sivan
Understanding the intricate relation between illumination and temperature in metallic nano-particles is crucial for elucidating the role of illumination in various physical process…
Matters Arising in -- "Plasmon-driven carbon-fluorine (C(sp^)-F) bond activation with mechanistic insights into hot-carrier-mediated pathways"
Yonatan Dubi, Ieng Wai Un, Joshua H. Baraban +1
In a recent paper~[Nature Catalysis 3, 573 (2020)], Robatjazi {\em et al.} demonstrate hydrodefluorination on Al nanocrystals decorated by Pd islands under illumination and under e…
The role of heat generation and fluid flow in plasmon-enhanced reduction-oxidation reactions
Ieng Wai Un, Yonatan Sivan
Recently, we have shown that thermal effects play a crucial role in speeding up the rate of bond-dissociation reactions. This was done by applying a simple temperature-shifted Arrh…
Reply to comment on "Thermal effects -- an alternative mechanism for plasmon-assisted photocatalysis"
Yonatan Dubi, Ieng Wai Un, Yonatan Sivan
Reply to comment on "Thermal effects -- an alternative mechanism for plasmon-assisted photocatalysis" by P. Jain [Chem. Sci., 2020, 11, DOI: 10.1039/D0SC02914A]
Parametric study of temperature distribution in plasmon-assisted photocatalysis
Ieng-Wai Un, Yonatan Sivan
Recently, there has been a growing interest in the usage of mm-scale composites of plasmonic nanoparticles for enhancing the rates of chemical reactions; the effect was shown recen…
The thermo-optic nonlinearity of single metal nanoparticles under intense continuous-wave illumination
Ieng Wai Un, Yoatan Sivan
Over the last few decades, extensive previous studies of the nonlinear response of metal nanoparticles report a wide variation of nonlinear coefficients, thus, revealing a highly c…
Size-Dependence of the photothermal response of a single metal nanosphere
Ieng-Wai Un, Yonatan Sivan
We study the thermal response of a single spherical metal nanoparticle to continuous wave illumination as a function of its size. We show that the particle temperature increases no…
Thermal effects - an alternative mechanism for plasmonic-assisted photo-catalysis
Yonatan Sivan, Ieng Wai Un, Yonatan Dubi
Recent experiments claimed that the enhancement of catalytic reaction rates occurs via the reduction of activation barriers driven by non-equilibrium (``hot'') electrons in plasmon…