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Articles 1 - 30 of 143
Full-Text Articles in Entire DC Network
Anomalous Stranski-Krastanov Growth Of (111)-Oriented Quantum Dots With Tunable Wetting Layer Thickness, Christopher F. Schuck, Simon K. Roy, Trent Garrett, Paul J. Simmonds
Anomalous Stranski-Krastanov Growth Of (111)-Oriented Quantum Dots With Tunable Wetting Layer Thickness, Christopher F. Schuck, Simon K. Roy, Trent Garrett, Paul J. Simmonds
Materials Science and Engineering Faculty Publications and Presentations
Driven by tensile strain, GaAs quantum dots (QDs) self-assemble on In0.52Al0.48As(111)A surfaces lattice-matched to InP substrates. In this study, we show that the tensile-strained self-assembly process for these GaAs(111)A QDs unexpectedly deviates from the well-known Stranski-Krastanov (SK) growth mode. Traditionally, QDs formed via the SK growth mode form on top of a flat wetting layer (WL) whose thickness is fixed. The inability to tune WL thickness has inhibited researchers’ attempts to fully control QD-WL interactions in these hybrid 0D-2D quantum systems. In contrast, using microscopy, spectroscopy, and computational modeling, we demonstrate that for GaAs(111)A QDs, we …
Second-Harmonic Optical Vortex Conversion From Ws₂ Monolayer, Arindam Dasgupta, Jie Gao, Xiaodong Yang
Second-Harmonic Optical Vortex Conversion From Ws₂ Monolayer, Arindam Dasgupta, Jie Gao, Xiaodong Yang
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Wavelength, polarization and orbital angular momentum of light are important degrees of freedom for processing and encoding information in optical communication. Over the years, the generation and conversion of orbital angular momentum in nonlinear optical media has found many novel applications in the context of optical communication and quantum information processing. With that hindsight, here orbital angular momentum conversion of optical vortices through second-harmonic generation from only one atomically thin WS2 monolayer is demonstrated at room temperature. Moreover, it is shown that the valley-contrasting physics associated with the nonlinear optical selection rule in WS2 monolayer precisely determines the output circular …
Inas(111)A Homoepitaxy With Molecular Beam Epitaxy, Kevin D. Vallejo, Trent A. Garrett, Kathryn E. Sautter, Kevin Saythavy, Baolai Liang, Paul J. Simmonds
Inas(111)A Homoepitaxy With Molecular Beam Epitaxy, Kevin D. Vallejo, Trent A. Garrett, Kathryn E. Sautter, Kevin Saythavy, Baolai Liang, Paul J. Simmonds
Materials Science and Engineering Faculty Publications and Presentations
The authors have established a robust set of growth conditions for homoepitaxy of high-quality InAs with a (111)A crystallographic orientation by molecular beam epitaxy (MBE). By tuning the substrate temperature, the authors obtain a transition from a 2D island growth mode to step-flow growth. Optimized MBE parameters (substrate temperature = 500 °C, growth rate = 0.12ML/s, and V/III ratio ≥ 40) lead to the growth of extremely smooth InAs(111)A films, free from hillocks and other 3D surface imperfections. The authors see a correlation between InAs surface smoothness and optical quality, as measured by photoluminescence spectroscopy. This work establishes InAs(111)A as …
9th Annual Postdoctoral Science Symposium, University Of Texas Md Anderson Cancer Center Postdoctoral Association
9th Annual Postdoctoral Science Symposium, University Of Texas Md Anderson Cancer Center Postdoctoral Association
Annual Postdoctoral Science Symposium Abstracts
The mission of the Annual Postdoctoral Science Symposium (APSS) is to provide a platform for talented postdoctoral fellows throughout the Texas Medical Center to present their work to a wider audience. The MD Anderson Postdoctoral Association convened its inaugural Annual Postdoctoral Science Symposium (APSS) on August 4, 2011.
The APSS provides a professional venue for postdoctoral scientists to develop, clarify, and refine their research as a result of formal reviews and critiques of faculty and other postdoctoral scientists. Additionally, attendees discuss current research on a broad range of subjects while promoting academic interactions and enrichment and developing new collaborations.
Phys 121-101: Physics Ii, Reginald Farrow
Opse 301-001: Optical Science & Engineering Optics, John Federici
Opse 301-001: Optical Science & Engineering Optics, John Federici
Physics Syllabi
No abstract provided.
Opse 310-001: Virtual Instrumentation, Jan Opyrchal
Opse 310-001: Virtual Instrumentation, Jan Opyrchal
Physics Syllabi
No abstract provided.
Phys 621-101: Classical Electromagnetism I, Slawomir Piatek
Phys 621-101: Classical Electromagnetism I, Slawomir Piatek
Physics Syllabi
No abstract provided.
Phys 103-003: General Physics, Halina Opyrchal
Phys 111-011: Physics I, Junjie Yang
Phys 111-003: Physics I, Vitaly Shneidman
Phys 111-017: Physics I, Kushal Shrestha
Phys 111-031: Physics I, Cristiano Dias
Phys 320-001: Solar System Astronomy, Dale E. Gary
Phys 320-001: Solar System Astronomy, Dale E. Gary
Physics Syllabi
No abstract provided.
Phys 234-003: Physics Iii, Andres Jerez
Phys 121-003: Physics Ii, Rich Janow
Phys 111-021: Physics I, Haimin Wang
Phys 121-005: Physics Ii, Jan Opyrchal
Phys 121-009: Physics Ii, Halina Opyrchal
Mtse 301-001: Materials Science, Halina Opyrchal
Mtse 301-001: Materials Science, Halina Opyrchal
Physics Syllabi
No abstract provided.
Phys 111-007: Physics I, Roland Levy
Phys 430-001: Classical Mechanics, Slawomir Piatek
Phys 430-001: Classical Mechanics, Slawomir Piatek
Physics Syllabi
No abstract provided.
Phys 111-009: Physics I, Roland Legy
Phys 432-001: Electromagnetism I, Slawomir Piatek
Phys 432-001: Electromagnetism I, Slawomir Piatek
Physics Syllabi
No abstract provided.
Phys 111-029: Physics I, Vitaly Shneidman
Phys 111-103: Physics I, Hyomin Kim
Phys 234-001: Physics Iii, Andres Jerez
Phys 121-013: Physics Ii, Rich Janow
Phys 121-103: Physics Ii, Libarid Maljian
Measuring Length Of Electron Bunches With Optics In Lcls-Ii, Nathan Ahn, Alan Fisher
Measuring Length Of Electron Bunches With Optics In Lcls-Ii, Nathan Ahn, Alan Fisher
STAR Program Research Presentations
Since the launch of the LINAC Coherent Light Source (LCLS) in 2009, there have been over 1,000 publications enabling pioneering research across multiple fields. Advances include: harnessing the sun’s light, revealing life’s secrets and aiding drug development, developing future electronics, designing new materials and exploring fusion, customizing chemical reactions, and many more. These discoveries gathered worldwide attention, and now work has begun on a new revolutionary tool, LCLS-II. The LCLS-II will pulse at a million times a second, compared to the 120 pulses from the LCLS. Within the LCLS-II, there are two chicanes, serpentine curves. As the electron beam passes …