178 citations · 465 across the 8 of their papers we have counts for
9 papers
Ab initio theory of free-carrier absorption in semiconductors
Xiao Zhang, Guangsha Shi, Joshua A. Leveillee +2
The absorption of light by free carriers in semiconductors results in optical loss for all photon wavelengths. Since free-carrier absorption competes with optical transitions acros…
First-Principles Calculations of the Near-Edge Optical Properties of \b{eta}-Ga2O3
Kelsey A. Mengle, Guangsha Shi, Dylan Bayerl +1
We use first-principles calculations based on many-body perturbation theory to investigate the near-edge electronic and optical properties of \b{eta}-Ga2O3. The fundamental band ga…
Surface Phonons in the Topological Insulators Bi2Se3 and Bi2Te3
Ibrahim Boulares, Guangsha Shi, Emmanouil Kioupakis +2
Raman scattering [K. M. F. Shahil et al., Appl. Phys. Lett. 96, 153103 (2010), V. Gnezdilov et al., Phys. Rev. B 84, 195118 (2011) and H. H. Kung et al., Phys. Rev. B 95, 245406 (2…
A Data Science Approach to Understanding Residential Water Contamination in Flint
Alex Chojnacki, Chengyu Dai, Arya Farahi +5
When the residents of Flint learned that lead had contaminated their water system, the local government made water-testing kits available to them free of charge. The city governmen…
Predictive Simulations for Tuning Electronic and Optical Properties of SubPc Derivatives
Michael J. Waters, Daniel Hashemi, Guangsha Shi +2
Boron subphthalocyanine chloride is an electron donor material used in small molecule organic photovoltaics with an unusually large molecular dipole moment. Using first-principles…
Flint Water Crisis: Data-Driven Risk Assessment Via Residential Water Testing
Jacob Abernethy, Cyrus Anderson, Chengyu Dai +10
Recovery from the Flint Water Crisis has been hindered by uncertainty in both the water testing process and the causes of contamination. In this work, we develop an ensemble of pre…
Frenkel-like Wannier-Mott Excitons in Few-Layer PbI2
Alexis S. Toulouse, Benjamin P. Isaacoff, Guangsha Shi +3
Optical measurements and first-principles calculations of the band structure and exciton states in direct-gap bulk and few-layer PbI2 indicate that the n = 1 exciton is Frenkel-lik…
Quasiparticle band structures and thermoelectric transport properties of p-type SnSe
Guangsha Shi, Emmanouil Kioupakis
We used density functional and many-body perturbation theory to calculate the quasiparticle band structures and electronic transport parameters of p-type SnSe both for the low-temp…
Generation of Diffraction-Free Optical Beams Using Wrinkled Membranes
Ran Li, Hui Yi, Xiao Hu +4
We report the first demonstration of wrinkled membranes as a kind of optical focusing devices, which are low cost, light weight and flexible. Our device consists of concentric wrin…