Interface quality in GaSb/AlSb short period superlattices

AbstractTrends in the behavior of band gaps in short-period superlattices (SLs) composed of CdO and MgO layers were analyzed experimentally and theoretically for several thicknesses of CdO sublayers. The optical properties of the SLs were investigated by means of transmittance measurements at room temperature in the wavelength range 200–700 nm. The direct band gap of {CdO/MgO} SLs were tuned from 2.6 to 6 eV by varying the thickness of CdO from 1 to 12 monolayers while maintaining the same MgO layer thickness of 4 monolayers. Obtained values of direct and indirect band gaps are higher than those theoretically calculated by an ab initio method, but follow the same trend. X-ray measurements confirmed the presence of a rock salt structure in the SLs. Two oriented structures (111 and 100) grown on c- and r-oriented sapphire substrates were obtained. The measured lattice parameters increase with CdO layer thickness, and the experimental data are in agreement with the calculated results. This new kind of SL structure may be suitable for use in visible, UV and deep UV optoelectronics, especially because the energy gap can be precisely controlled over a wide range by modulating the sublayer thickness in the superlattices.

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Origin for the unusual photoluminescence behavior of GaP/AlP short-period superlattices in a strong magnetic field

Microelectronic Engineering ◽

10.1016/s0167-9317(99)00220-8 ◽

1999 ◽

Vol 47 (1-4) ◽

pp. 305-307 ◽

Cited By ~ 1

Author(s):

Yoshinori Kobayashi ◽

Kazuma Kouzu ◽

Hiroshi Kamimura

Keyword(s):

Magnetic Field ◽

Strong Magnetic Field ◽

Short Period ◽

Short Period Superlattices ◽

Photoluminescence Behavior

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Structural and optical properties of In0.5Ga0.5As/GaAs quantum dots in an In0.1Ga0.9As well using repeated depositions of InAs/GaAs short-period superlattices for the application of optical communication

Physica E Low-dimensional Systems and Nanostructures ◽

10.1016/j.physe.2005.12.021 ◽

2006 ◽

Vol 32 (1-2) ◽

pp. 115-118 ◽

Cited By ~ 3

Author(s):

J.D. Song ◽

W.J. Choi ◽

J.I. Lee ◽

J.Y. Lee

Keyword(s):

Quantum Dots ◽

Optical Properties ◽

Optical Communication ◽

Structural And Optical Properties ◽

Short Period ◽

Short Period Superlattices

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Thickness dependence of temperature-induced emission mechanism in InGaN/AlGaN short-period superlattices

Journal of Applied Physics ◽

10.1063/1.4746744 ◽

2012 ◽

Vol 112 (4) ◽

pp. 043102 ◽

Cited By ~ 3

Author(s):

Young-Kyun Noh ◽

Jeong-Han Seo ◽

Hyo-Seok Choi ◽

Moon-Deock Kim ◽

Jae-Eung Oh

Keyword(s):

Thickness Dependence ◽

Emission Mechanism ◽

Short Period ◽

Short Period Superlattices

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Instabilities, Elasticity, and Wetting Effect in Multilayer Heteroepitaxial Growth

MRS Proceedings ◽

10.1557/proc-794-t9.2 ◽

2003 ◽

Vol 794 ◽

Author(s):

Zhi-Feng Huang ◽

Rashmi C. Desai

Keyword(s):

Periodic Structures ◽

Morphological Evolution ◽

Surface Profile ◽

Theoretical Work ◽

Semiconductor Films ◽

Morphological Instability ◽

Heteroepitaxial Growth ◽

Surface And Interface ◽

Short Period ◽

Short Period Superlattices

ABSTRACTFor multilayer semiconductor films comprising various material layers, the coupling of elastic states in different layers as well as the nonequilibrium nature of the growing process are essential in understanding the surface and interface morphological instability and hence the growth mechanisms of nanostructures in the overall film. We present the theoretical work on the stress-driven instabilities during the heteroepitaxial growth of multilayers, based on the elastic analysis and the continuous nonequilibrium model. We develop a general theory which determines the morphological evolution of surface profile of the multilayer system, and then apply the results to two types of periodic structures that are being actively investigated: alternating tensile/compressive and strained/spacer multilayers. The wetting effect, which arises from the material properties changing across layer-layer interfaces, is incorporated. It exhibits a significant influence of stabilization on film morphology, particularly for the short-period superlattices. Our results are consistent with the experimental observations in AlAs/InAs/InP(001) and Ge/Si(001) multilayer structures.

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