Molecular-beam epitaxy of MnAs on patterned GaAs substrates

Improved performance of strained InGaAs/GaAs photodiodes grown on patterned GaAs substrates by molecular beam epitaxy

We have experimentally studied the photoresponse characteristics of strained In,Gar _ XAs (0.05<~<0.20) p-i-n photodiodes grown in small holes etched in GaAs substrates where the thickness of the i region exceeds the critical thickness. The diodes exhibit enhanced quantum efficiency and no degradation of the temporal response compared with devices grown on planar substrates, indicating that red...

Au impact on GaAs epitaxial growth on GaAs (111)B substrates in molecular beam epitaxy

Formation of Ga droplets on patterned GaAs (100) by molecular beam epitaxy

In this paper, the formation of Ga droplets on photo-lithographically patterned GaAs (100) and the control of the size and density of Ga droplets by droplet epitaxy using molecular beam epitaxy are demonstrated. In extension of our previous result from the journal Physical Status Solidi A, volume 209 in 2012, the sharp contrast of the size and density of Ga droplets is clearly observed by high-...

InGaAsÕAlGaAs intersubband transition structures grown on InAlAs buffer layers on GaAs substrates by molecular beam epitaxy

We report on the use of InAlAs linearly graded buffer layers for improving the performance of InyGa12yAs (y.0.42)/AlGaAs intersubband transition ~ISBT! superlattice structures grown on GaAs substrates by molecular beam epitaxy. Linearly graded InAlAs buffer layers give better optical confinement in the active superlattice region, similar intersubband transition linewidths, and comparable surfac...

Characterization of GaAs grown by molecular beam epitaxy on vicinal Ge„100... substrates

In this article we investigate the growth of GaAs on two different vicinal surfaces of Ge ~100!, cut 6° off the ~100! plane toward the ~110! plane or toward the ~111! plane. Both substrates exhibit evidence of a regular array of double steps. Ge substrates and GaAs films are characterized with low energy electron diffraction, low temperature photoluminescence, scanning tunneling microscopy, ele...