179 citations · 1.1k across the 51 of their papers we have counts for
51 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…
An improved argument principle root-search method for modes of slab waveguides, optical fibers, and spheres
S. Rao, P. Y. Chen, T. Grossinger +1
We update our root-search method for transcendental equations. Our method is globally convergent and is guaranteed to locate all complex roots within a specified search domain, sin…
Photoluminescence from metal nanostructures -- dependence on size
Imon Kalyan, Ieng Wai Un, Gilles Rosolen +2
For decades, there have been multiple seemingly contradicting experimental reports on the dependence of the photoluminescence from metal nanostructures on their size. We reconcile…
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…