This is an opportunity to participate in developing models for semiconductor electronic, opto-electronic and photonic devices. Materials studied range from wide to low bandgap semiconductors, two-dimensional layered materials, and topological insulators. Opto-electronic properties include point defects and doping in semiconductors, bandgap engineering, quasi-2D materials, electron-phonon coupling, and topological states in resonator arrays. Structural properties addressed include elastic, vibrational, and phase stability properties of binary semiconductors and alloys. The modeling leverages the High Performance Computing facilities of the Department of Defense.

References

BJ Thompson, RG, DR Carlson, and SC Badescu Topological Photonics in Low Loss Tantalum Pentoxide

W. You, BJ Thompson, PJ Shah, R Bedford, R Gibson, S Arafin, and SC Badescu Effects of Disorders on Ring Resonator-Based Topological Lasers at 1.55 µm

W. Chu et al,  Considerations for Electrically-Pumped Quantum Hall Effect Topological Laser Arrays

Carter SG, Badescu SC, Bracker AS, Yakes MK, Tran KX, Grim JQ, Gammon D:  Coherent Population Trapping Combined with Cycling Transitions for Quantum Dot Hole Spins Using Triplet Trion States". Phys. Rev. Lett. 126, 107401 (2021)

Look DC, Leedy KD, Santia MD, Badescu SC: "Quantum magnetoconductivity characterization of interface disorder in indium-tin-oxide films on fused silica". Nature Communications Materials volume 2, Article number: 33 (2021) 

Look DC, Leedy KD, Santia MD, Horng R-H, Badescu SC: Electrical and optical properties of degenerate and semi-insulating ZnGa2O4: Electron/phonon scattering elucidated by quantum magnetoconductivity

Snure M, Prusnick T, Bianco E, Badescu SC: "A Computational and Experimental Investigation of the Phonon and Optical Properties of Au2P3". Materials, 12(4), 555, 2019

Lee J, Ganguli S, Roy AK, Badescu SC: ”Density Functional Tight Binding Study of b-Ga2O3: Electronic Structure, Surface Energy, and Native Point Defects”, J. Chem. Phys. 150, 174706, 2019

Hader J, Badescu SC, Bannow LC, Moloney JV, Johnson SR, Koch SW: "Extended band anti-crossing model for dilute bismides", Appl. Phys. Lett. 112, 062103, 2018

Bannow LC, Badescu SC, Hader J, Moloney JV, Koch SW: "Valence band splitting in bulk dilute bismides", Appl. Phys. Lett. 111, 182103, 2017

Siegel G, Ciobanu, CV Narayanan B, Snure M, Badescu SC: "Heterogeneous Pyrolysis: A Route for Epitaxial Growth of hBN Atomic Layers on Copper Using Separate Boron and Nitrogen Precursors". Nano Letters 17(4) 2404-2413, 2017

Oshima Y, Ahmadi E, Badescu SC, Wu F, Speck JS: “Composition determination of β-(Al x Ga1−x )2O3 layers coherently grown on (010) β-Ga2O3 substrates by high-resolution X-ray diffraction". Applied Physics Express 9: 061102, 2016

Bannow LC, Rubel O, Badescu SC, et al: "Configuration dependence of band-gap narrowing and localization in dilute GaAs1−xBix alloys". Physical Review B 93: 205202, 2016

 

key words

Semiconductors; Computation; Sensors; Materials science; Density functional theory; Photonics

Citizenship:  Open to U.S. citizens

Level:  Open to Postdoctoral and Senior applicants