TITLE

Electronic and optical properties of CdZnO quantum well structures with electric field and polarization effects

AUTHOR(S)
Jeon, H. C.; Park, S. H.; Lee, S. J.; Kang, T. W.; George, T. F.
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/8/2010, Vol. 96 Issue 10, p101113
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Electronic, optical, and electrical properties of CdZnO/MgZnO quantum well (QW) structures, considering internal field and polarization effect, are investigated by using many-body theory. The CdZnO/MgZnO QW structure with higher Cd composition, which has deeper and stronger confinement, is found to have smaller optical gain because the strain-induced piezoelectric polarization and spontaneous polarization in the well increase with the inclusion of Cd. The internal field and polarization is reduced effectively by using the ferroelectric dipole moment of the Li addition in the well region of the Li-doped CdZnO/ZnMgO QW structure. These results demonstrate that a high-performance optical devices operation can be realized in CdZnO/MgZnO QW structures by eliminating the droop phenomenon.
ACCESSION #
48591080

 

Related Articles

  • Internal electric fields due to piezoelectric and spontaneous polarizations in CdZnO/MgZnO quantum well. Jeon, H. C.; Lee, S. J.; Kang, T. W.; Park, S. H.; Yeo, Yung Kee; George, T. F. // AIP Conference Proceedings;12/22/2011, Vol. 1399 Issue 1, p581 

    We have investigated optical properties as a function of internal and external fields in the quantum well (QW). Optical properties of CdZnO/MgZnO QW structures are investigated by using many-body effects. The CdZnO/MgZnO QW structure with high Cd composition is found to have smaller optical gain...

  • Polarization justified Fukui functions: The theory and applications for molecules. Komorowski, Ludwik; Lipinski, Józef; Szarek, Paweł; Ordon, Piotr // Journal of Chemical Physics;7/7/2011, Vol. 135 Issue 1, p014109 

    The Fukui functions based on the computable local polarizability vector have been presented for a group of simple molecules. The necessary approximation for the density functional theory softness kernel has been supported by a theoretical analysis unifying and generalizing early concepts...

  • Ab Initio HF and DFT Calculation of the Second Order NLO Response of Tetrathiafulvalene and 1,3-Dithiole Derivatives. Andreu, R.; Blesa, M. J.; Franco, S.; Garín, J.; Orduna, J. // AIP Conference Proceedings;12/26/2007, Vol. 963 Issue 2, p326 

    The nonlinear optical properties of new tetrathiafulvalenes and 1,3-dithioles have been studied using first principle methods. The higher hyperpolarizabilities of the extended 1,3-dithioles compared to Tetrathiafulvalene analogs are explained on the basis of the less localized HOMO of the former...

  • Determination of built-in electric fields in quaternary InAlGaN heterostructures. Teisseyre, H.; Suski, T.; Łepkowski, S. P.; Anceau, S.; Perlin, P.; Lefebvre, P.; Konczewicz, L.; Hirayama, H.; Aoyagi, Y. // Applied Physics Letters;3/10/2003, Vol. 82 Issue 10, p1541 

    A study of internal electric field contribution to the light emission mechanism of InAlGaN based multiquantum wells was performed. To determine the magnitude of the built-in electric field we employed: (i) theoretical estimation of the piezoelectric and spontaneous polarizations, (ii) analysis...

  • Composition dependence of polarization fields in GaInN/GaN quantum wells. Hangleiter, A.; Hitzel, F.; Lahmann, S.; Rossow, U. // Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1169 

    We report an experimental determination of the internal polarization field in GaInN/GaN quantum wells, due to piezoelectric and spontaneous polarization, utilizing the quantum confined Stark effect, with fields as large as 3.1 MV/cm at 22% In. From its dependence on quantum well composition and...

  • Effects of piezoelectricity and spontaneous polarization on electronic and optical properties of wurtzite III–V nitride quantum wells. Wan, Shou-pu; Xia, Jian-bai; Chang, Kai // Journal of Applied Physics;12/15/2001, Vol. 90 Issue 12, p6210 

    A theoretical model accounting for the macropolarization effects in wurtzite III–V nitrides quantum wells (QWs) is presented. Energy dispersions and exciton binding energies are calculated within the framework of effective-mass theory and variational approach, respectively....

  • Theory of optical gain in strained-layer quantum wells within the 6×6 Luttinger–Kohn model. Ahn, Doyeol; Yoon, Sean J.; Chuang, Shun Lien; Chang, Chih-Sheng // Journal of Applied Physics;8/15/1995, Vol. 78 Issue 4, p2489 

    Presents a study that examined the effects of the spin-orbit split-off band coupling with the heavy- and the light-hole bands on the band structure, density of states, dipole moment and the linear and nonlinear optical gains of strained-layer quantum wells. Importance of strained-layer quantum...

  • The electric dipole moment of NiH X 2Δ5/2 and B 2Δ5/2. Gray, Jeffrey A.; Rice, Steven F.; Field, R. W. // Journal of Chemical Physics;5/15/1985, Vol. 82 Issue 10, p4717 

    A sputter source/supersonic jet apparatus has been developed in order to record MJ-resolved Stark spectra of refractory diatomic molecules. Dipole moments of 0.3±0.1 and 2.4±0.1 D have been measured for the NiH B 2Δ5/2(v=1) and X 2Δ5/2(v=0) levels from resolved splittings of the...

  • Symmetry and group theory throughout physics. Villain, J. // EPJ Web of Conferences;2012, Issue 22, p1 

    As noticed in 1884 by Pierre Curie [1], physical properties of matter are tightly related to the kind of symmetry of the medium. Group theory is a systematic tool, though not always easy to handle, to exploit symmetry properties, for instance to find the eigenvectors and eigenvalues of an...

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