Scholars@Duke
Divine P Kumah

Divine P Kumah

Charles H. Townes Associate Professor of Physics
Physics
Box 90305, Durham, NC 27708
120 Science Dr., Physics Bldg. Room 077, Durham, NC 27708

Scholarly Works - Conferences

Electrically coupling multifunctional oxides to semiconductors: A route to novel material functionalities

Conference MRS Advances · January 1, 2016 Complex oxides and semiconductors exhibit distinct yet complementary properties owing to their respective ionic and covalent natures. By electrically coupling oxides to semiconductors within epitaxial heterostructures, enhanced or novel functionalities bey ... Full text Cite

A silicon integrated BaTiO3 electro-optic modulator

Conference Conference on Lasers and Electro Optics Europe Technical Digest · January 1, 2014 A Si-integrated modulator based on epitaxial ferroelectric BaTiO3 thin films is demonstrated with gigahertz modulation bandwidth and an effective Pockels coefficient of 213 ± 49 pm/V. ... Cite

A silicon integrated BaTiO3 electro-optic modulator

Conference Optics Infobase Conference Papers · January 1, 2014 A Si-integrated modulator based on epitaxial ferroelectric BaTiO3 thin films is demonstrated with gigahertz modulation bandwidth and an effective Pockels coefficient of 213 ± 49 pm/V. © 2014 OSA. ... Full text Cite

Surface x-ray diffraction of complex metal oxide surfaces and interfaces - a new era

Conference Aip Conference Proceedings · April 23, 2009 The availability of high-brilliance hard x-ray synchrotron radiation and the advent of novel photon counting area detectors have brought surface x-ray diffraction (SXRD) into a new era. It is now possible to record large numbers of structure factors with m ... Full text Cite

In situ imaging of high cycle fatigue crack growth in single crystal nickel-base superalloys by synchrotron X-radiation

Conference Journal of Engineering Materials and Technology · January 1, 2008 A novel X-ray synchrotron radiation approach is described for real-time imaging of the initiation and growth of fatigue cracks during ultrasonic fatigue (f=20 kHz). We report here on new insights on single crystal nickel-base superalloys gained with this a ... Full text Cite

Surface plasmon resonance effects in the Magneto Optical activity of noble metal-ferro magnet ultrathin films

Conference Conference on Lasers and Electro Optics Europe Technical Digest · December 1, 2007 Full text Cite

Demonstration of spatial coherence with a compact and ultrafast x-ray source

Conference Conference on Lasers and Electro Optics and 2006 Quantum Electronics and Laser Science Conference CLEO QELS 2006 · December 1, 2006 We used Fresnel diffraction from knife-edges to demonstrate spatial coherence of tabletop and ultrafast X-ray sources produced by laser-plasma interaction, and show that source size is limited by the spatial spread of absorbed laser energy. © 2006 Optical ... Full text Cite