activity
20152024
most citedBand-to-band transitions, selection rules, effective mass and exciton binding energy parameters in monoclinic β-Ga2O3

192 citations · 456 across the 16 of their papers we have counts for

collaborators

16 papers

cond-mat.mtrl-sci2024

Effective uniaxial dielectric function tensor and optical phonons in ()-plane oriented -GaO films with equally-distributed six-fold rotation domains

Alyssa Mock, Steffen Richter, Alexis Papamichail +11

Monoclinic -GaO films grown on -plane sapphire have been shown to exhibit six -plane oriented domains, which are equally-spaced-by-rotation around the su…

cond-mat.mtrl-sci2022

Strain and composition dependencies of the near bandgap optical transitions in monoclinic (AlGa)O alloys with coherent biaxial in-plane strain on (010) GaO

Rafał Korlacki, Matthew Hilfiker, Jenna Knudtson +7

The bowing of the energy of the three lowest band-to-band transitions in -(AlGa)O alloys was resolved using a combined density functional theory (DFT) and…

cond-mat.mtrl-sci2022★ 19 cited

Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC

Mathias Schubert, Sean Knight, Steffen Richter +8

We report on terahertz (THz) electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE). Measurements of the field and frequency dependencies of the magne…

cond-mat.mtrl-sci2021

Infrared dielectric functions and Brillouin zone center phonons of -GaO compared to -AlO

Megan Stokey, Rafal Korlacki, Matthew Hilfiker +11

We determine the anisotropic dielectric functions of rhombohedral -GaO by far-infrared and infrared generalized spectroscopic ellipsometry and derive all transverse opti…

cond-mat.mtrl-sci2021★ 23 cited

Optical phonon modes, static and high frequency dielectric constants, and effective electron mass parameter in cubic InO

Megan Stokey, Rafal Korlacki, Sean Knight +8

A complete set of all optical phonon modes predicted by symmetry for bixbyite structure indium oxide is reported here from a combination of far-infrared and infrared spectroscopic…

cond-mat.mtrl-sci2021★ 27 cited

Anisotropic dielectric functions, band-to-band transitions, and critical points in α-Ga2O3

Matthew Hilfiker, Rafał Korlacki, Riena Jinno +6

We use a combined generalized spectroscopic ellipsometry and density functional theory approach to determine and analyze the anisotropic dielectric functions of an -GaO…

cond-mat.mtrl-sci2019★ 13 cited

Infrared active phonons in monoclinic lutetium oxyorthosilicate

M. Stokey, A. Mock, R. Korlacki +3

A combined generalized spectroscopic ellipsometry measurement and density functional theory calculation analysis is performed to obtain the complete set of infrared active phonon m…

cond-mat.mtrl-sci2018★ 20 cited

Phonon order and reststrahlen bands of polar vibrations in crystals with monoclinic symmetry

M. Schubert, A. Mock. R. Korlacki, V Darakchieva

We derive from an eigendielectric displacement vector summation approach the frequency order of the polar phonon modes and the polarization-dependent structure of the reststrahlen…

physics.optics2018★ 1 cited

Tunable plasmonic resonances in highly porous nano-bamboo Si-Au superlattice-type thin films

Ufuk Kilic, Alyssa Mock, Rene Feder +6

We report on fabrication of spatially-coherent columnar plasmonic nanostructure superlattice-type thin films with high porosity and strong optical anisotropy using glancing angle d…

cond-mat.mtrl-sci2018★ 12 cited

Critical-point model dielectric function analysis of WO thin films deposited by atomic layer deposition techniques

Ufuk Kilic, Derek Sekora, Alyssa Mock +5

WO3 thin films were grown by atomic layer deposition and spectroscopic ellipsometry data gathered in the photon energy range of 0.72-8.5 eV and from multiple samples was utilized t…

cond-mat.mtrl-sci2017★ 26 cited

Anisotropy and phonon modes from analysis of the dielectric function tensor and inverse dielectric function tensor of monoclinic yttrium orthosilicate

A. Mock, R Korlacki, S. Knight +1

We determine the frequency dependence of the four independent Cartesian tensor elements of the dielectric function for monoclinic symmetry YSiO using generalized spectrosco…

cond-mat.mtrl-sci2017★ 59 cited

Electron effective mass in Sn-doped monoclinic single crystal -gallium oxide determined by mid-infrared optical Hall effect

Sean Knight, Alyssa Mock, Rafał Korlacki +6

The isotropic average conduction band minimum electron effective mass in Sn-doped monoclinic single crystal -GaO is experimentally determined by mid-infrared optical Hal…

cond-mat.mtrl-sci2017★ 192 cited

Band-to-band transitions, selection rules, effective mass and exciton binding energy parameters in monoclinic β-Ga2O3

Alyssa Mock, Rafał Korlacki, Chad Briley +6

We employ an eigen polarization model including the description of direction dependent excitonic effects for rendering critical point structures within the dielectric function tens…

cond-mat.mtrl-sci2017★ 32 cited

Anisotropy, phonon modes, and lattice anharmonicity from dielectric function tensor analysis of monoclinic cadmium tungstate

A. Mock, R. Korlacki, S. Knight +1

We determine the frequency dependence of four independent CdWO Cartesian dielectric function tensor elements by generalized spectroscopic ellipsometry within mid-infrared and f…

physics.ins-det2016★ 13 cited

Anisotropic Contrast Optical Microscope

D. Peev, T. Hofmann, N. Kananizadeh +12

An optical microscope is described that reveals contrast in the Mueller matrix images of a thin, transparent or semi-transparent specimen located within an anisotropic object plane…

cond-mat.mtrl-sci2015★ 19 cited

Anisotropy, band-to-band transitions, phonon modes, and oxidation properties of cobalt-oxide core-shell slanted columnar thin films

Alyssa Mock, Rafal Korlacki, Chad Briley +6

Highly-ordered and spatially-coherent cobalt slanted columnar thin films were deposited by glancing angle deposition onto silicon substrates, and subsequently oxidized by annealing…