TITLE

High-quality distributed Bragg reflectors based on Al[sub x]Ga[sub 1-x]N/GaN multilayers grown by molecular-beam epitaxy

AUTHOR(S)
Ferna´ndez, S.; Naranjo, F. B.; Calle, F.; Sa´nchez-Garcı´a, M. A.; Calleja, E.; Vennegues, P.; Trampert, A.; Ploog, K. H.
PUB. DATE
October 2001
SOURCE
Applied Physics Letters;10/1/2001, Vol. 79 Issue 14, p2136
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Distributed Bragg reflectors based on Al[sub x]Ga[sub 1-x]N/GaN multilayer stacks have been grown by plasma-assisted molecular-beam epitaxy on GaN templates. The nominal Al composition ranged from 30% to 45%, and the layer thicknesses of the ten-period stack were designed for a target wavelength of 510 nm. Transmission electron microscopy data reveal periodic structures where (Al,Ga)N on the GaN interface is sharper than GaN on the (Al,Ga)N one. X-ray diffraction spectra fitted to a dynamic diffraction simulation model yield an estimate of the layer thicknesses, Al%, and lattice strain. Reflectivity values above 50% at 510 nm have been reproducibly achieved, in very good agreement with the results of the matrix-method simulation. © 2001 American Institute of Physics.
ACCESSION #
5227973

 

Related Articles

  • Charge injection through Langmuir–Blodgett films into organic polymers. Yuh, Huoy-Jen; Chen, Cindy C.; Chen, Inan // Applied Physics Letters;3/23/1987, Vol. 50 Issue 12, p730 

    The steady-state current-voltage characteristics resulting from charge injection from a metal into an organic charge transporting polymer are found to deviate significantly from the space-charge-limited values when a Langmuir–Blodgett film of cadmium stearate is interposed between the...

  • Anomalous Temperature Dependence of the Magnetoresistance in Co/Cu Multilayers. Kim, P. D.; Khalyapin, D. L.; Turpanov, I. A.; Li, L. A.; Beten’kova, A. Ya.; Kan, S. V. // Physics of the Solid State;Sep2000, Vol. 42 Issue 9, p1688 

    An anomalous temperature dependence of magnetoresistance (MR) of Co/Cu multilayer films with a ∼3 Å thick magnetic layer has been established experimentally. The temperature of the MR maximum T[sub max] is shown to coincide with the Néel temperature. The variation of T[sub max] with...

  • Convergent ellipsometry around Brewster angle for quantitative evaluation of Langmuir films. Hosoda, Maiko; Kobayashi, Hiroshi; Sakamoto, Naoto; Sakai, Keiji // Review of Scientific Instruments;Dec1996, Vol. 67 Issue 12, p4224 

    Develops a technique of Brewster angle ellipsometry for quantitative evaluation of the Langmuir films extended on water surface. Angular distribution of reflected light; Spatial scan of a photodetector; Increase in minimum reflectivity due to the presence of a Langmuir film; Technique's...

  • Apparatus for making superlattice Langmuir–Blodgett films with atmosphere and temperature control. Armen, T.; Halperin, K.; Dutta, P.; Ketterson, J. B. // Review of Scientific Instruments;May87, Vol. 58 Issue 5, p822 

    We describe an instrument consisting of two adjacent Langmuir troughs and an apparatus capable of dipping substrates in either trough. Such a capability permits the fabrication of Langmuir–Blodgett multilayer films consisting of two alternating components. The troughs are housed in a...

  • Photothermoelastic transfer matrix. Bozoki, Zoltan; Miklos, Andras; Bicanic, Dane // Applied Physics Letters;3/14/1994, Vol. 64 Issue 11, p1362 

    Presents a photothermoelastic transfer matrix method for measuring the thermoelastic response of multilayered thin films exposed to modulated laser heating. Use of the method for the modelization of photothermal measurements; General expression for photopyroelectric signals; Enumeration of the...

  • Giant magnetoresistance in Co1-xCu/Cu multilayers: A new approach to reduced magnetoresistive... Kubinski, D.J.; Holloway, H. // Journal of Applied Physics;7/1/1997, Vol. 82 Issue 1, p322 

    Reports that Co1-xCux/Cu multilayers have been made by sputtering using codeposition of Co and Cu to obtain Co1-xCux alloy layers that are separated by Cu spacers. Growth techniques; Properties of multilayers with codeposited Cu and Co.

  • Bulk metallic multilayers produced by repeated press-rolling and their perpendicular... Yasuna, K.; Terauchi, M.; Otsuki, A.; Ishihara, K. N.; Shingu, P. H. // Journal of Applied Physics;9/1/1997, Vol. 82 Issue 5, p2435 

    Studies the fabrication of bulk Fe/Ag multilayers with layer thickness of about 10 nm by repeated press-rolling directly from a macroscopic stack of metal sheets. Plane geometry; Annealing of the pressed stack; Current flow perpendicular to the layers.

  • Correlation between giant magnetoresistance and magnetic interactions in a CoAg... Viegas, A.D.C.; Geshev, J.; Schelp, L. F.; Schmidt, J. E. // Journal of Applied Physics;9/1/1997, Vol. 82 Issue 5, p2466 

    Studies the magnetic interaction effects and its correlation to giant magnetoresistance in Co/Ag multilayered films submitted to thermal annealing. Misalignment of the magnetic moments of the Co particles; Demagnetizing interparticle interactions; Coercive field values.

  • Thermal stability of NdGd/FeCo multilayers. Yu, X. Y.; Suganuma, T.; Watabe, H.; Iwata, S.; Tsunashima, S.; Uchiyama, S. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p7090 

    Focuses on a study which investigated the thermal stability of the structure and perpendicular anisotropy of Nd[sub44]Gd[sub56]/Fe[sub89]Co[sub11] multilayer films. Experimental method; Results and discussion; Conclusion.

  • Giant magnetoresistance with low saturation field in (NixCo100-x/Cu) multilayers. Bian, X.; Ström-Olsen, J. O.; Altounian, Z.; Huai, Y.; Cochrane, R. W. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p7064 

    Deals with a study which investigated giant magnetoresistance in Ni[subx]Co[100-x]/Cu multilayers. Experimental details; Results and discussions; Conclusions.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics