Skip to main content

10 Result(s)

within F. G. Celii Remove this filter

and

  1. No Access

    Article

    In-Situ Diagnostics of Diamond CVD

    The deposition of diamond, a metastable crystalline form of carbon, from low pressure gases poses intriguing questions about the mechanisms of growth. Tunable IR Diode Laser Absorption Spectroscopy, Laser Mult...

    J. E. Butler, F. G. Celii, P. E. Pehrsson, H. -t. Wang… in MRS Online Proceedings Library (2011)

  2. No Access

    Article

    Continuous in situ growth rate extraction using pyrometric interferometry and laser reflectance measurement during molecular beam epitaxy

    We describe a new, universal, and easy-to-use method for real-time thickness and growth rate extraction based on in situ optical monitoring during molecular beam epitaxy of GaAs/AlAs layered structures. The metho...

    J.J. Zhou, Y. Li, P. Thompson, R. Chu, H.P. Lee… in Journal of Electronic Materials (1997)

  3. No Access

    Article

    Characterization of surface roughness anisotropy on mismatched InAIAs/lnP heterostructures

    We have studied surface roughness on mismatched In0.65Al0.35As epilayers of various thicknesses on (001) InP. The sample set spans the entire range from coherently strained to completely relaxed epilayers. As cha...

    M. T. Sinn, J. A. del Alamo, B. R. Bennett, K. Haberman… in Journal of Electronic Materials (1996)

  4. No Access

    Article

    Closed-Loop Thickness Control of Resonant-Tunneling Diode MBE Growth Using Spectroscopic Ellipsometry

    The room temperature electrical characteristics of AlAs/InGaAs/InAs resonant-tunneling diode (RTD) devices are sensitive to sub-monolayer thickness changes, and present a challenging case for closed-loop contr...

    F. G. Celii, Y.-C. Kao, T. S. Moise, M. Woolsey… in MRS Online Proceedings Library (1995)

  5. No Access

    Article

    Real-Time monitoring of III-V molecular beam epitaxial growth using spectroscopic ellipsometry

    We report the real-time monitoring of monolayer thickness changes in AlAs and GaAs layer growth on rotating GaAs substrates using spectroscopic ellipsometry (SE). A phase-modulated spectroscopic ellipsometer w...

    F. G. Celii, W. M. Duncan, Y. C. Kao in Journal of Electronic Materials (1995)

  6. No Access

    Article

    In Situ Flux Transient Monitoring and Correction During MBE Growth of Quantum Well Structures

    Shutter closure during MBE deposition causes source overheating and results in flux transients. These transients are particularly detrimental to the thickness and compositional accuracy of thin quantum well la...

    F. G. Celii, Y.-C. Kao, A. J. Katz in MRS Online Proceedings Library (1993)

  7. No Access

    Article

    The effects of UV laser irradiation on the filament-assisted deposition of diamond

    The effects of 193 and 308 nm excimer laser radiation on the filament-assisted chemical vapor deposition (CVD) of diamond were investigated, in attempts to reproduce and quantify the reported mechanism of lase...

    F. G. Celii, H. H. Nelson, P. E. Pehrsson in Journal of Materials Research (1990)

  8. No Access

    Article

    Investigations of Excimer Laser Effects on CVD Diamond Growth

    We investigated UV laser irradiation as a method to modify the surface and gas phase chemistry in a diamond growth apparatus. In particular, attempts were made to reproduce reported laser-enhanced deposition. ...

    Pehr E. Pehrsson, H. H. Nelson, F. G. Celii in MRS Online Proceedings Library (1989)

  9. No Access

    Article

    The gas phase “matrix isolation” spectroscopy of CH3F

    We report infrared photodissociation spectra for Ne, Ar, Kr, N2 and CH4 clusters which contain CH3F chromophores. The CH3Fv 3 mode is excited with a line tunable CO2 laser. Mass spectrometer detection of changes ...

    F. G. Celii, K. C. Janda in Zeitschrift für Physik D Atoms, Molecules and Clusters (1988)

  10. No Access

    Chapter

    Recent Developments in Studies of Open-Shell Cations Via Their Electronic Transitions

    Some of our recent developments aimed at spectral characterization of open-shell cations by means of their electronic transitions will be outlined in this contribution. These involve on the one hand the use of...

    F. G. Celii, P. O. Danis, D. Forney… in The Structure of Small Molecules and Ions (1988)