Auger recombination suppression and band alignment in GaAsBi/GaAs heterostructures

نویسندگان

  • K. Hild
  • Z. Batool
  • S. R. Jin
  • N. Hossain
  • S. J. Sweeney
  • I. P. Marko
  • T.JC. Hosea
  • X. Lu
  • T. Tiedje
چکیده

Using a combination of experimental and theoretical techniques we present the dependence of the bandgap Eg and the spin orbit splitting energy so, with Bi concentration in GaAsBi/GaAs samples. We find that the concentration at which so,> Eg occurs at 9%. Both spectroscopic as well as first device results indicate a type I alignment.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

SWEENEY, STEPHEN (University of Surrey) Auger and optical loss suppression in near- and mid-IR emitters based upon Bismide alloys

III-Bismides are a relatively underexplored set of III-V alloys yet offer the possibility to engineer many aspects of the band structure and band alignment which are of significant potential benefit to photonic devices. For example, the incorporation of Bismuth into binary compounds such as GaAs leads to a band anti-crossing effect. However, unlike the dilute nitrides, this occurs in the valenc...

متن کامل

Photomodulated Reflectance Spectroscopy of GaAsBi/GaAs layers grown by MBE

The III-bismides are considered to be a very attractive set of III-V alloys due to their potential applications in photonic and spintronic devices. The incorporation of bismuth into GaAs, with its band anti-crossing effect in the valence band of GaAs, leads to a decrease in the temperature dependence of the bandgap. Such a material may be very useful in designing temperature-insensitive semicon...

متن کامل

Modelling the Auger Recombination Rates of GaAs(1−x)Bix Alloys

We calculate the |Conduction, Heavy Hole (HH)〉 |Split-off Hole (SO), HH〉 (CHSH) Auger Recombination rates for GaAs(1−x)Bix alloys, which are candidates for highly efficient telecommunication devices. A ten-band, tight-binding method, including spin-orbit coupling, was performed on a 9x9x9 strained supercell in order to generate an accurate band structure to perform the calculation on. This band...

متن کامل

Auger Recombination in GaAs from First Principles

Auger recombination is a significant loss mechanism in many optoelectronic devices. We use first-principles methods based on density functional theory to study the relative importance of direct and indirect phonon-assisted Auger recombination in GaAs and related alloys. Energy and momentum of the recombining electron−hole pair can be transferred to an Auger electron (eeh process) or an Auger ho...

متن کامل

Band Alignments in InxGa1±xP/GaAs Heterostructures Investigated by Pressure Experiments

InxGa1± xP/GaAs (x ˆ 0.541 and 0.427) heterostructures, grown by Atomic Layer Molecular Beam Epitaxy (ALMBE) on low temperature substrates, have been characterised by pressure-dependent and time-resolved photoluminescence experiments. The excitonic optical transitions and recombination dynamics are both influenced by the particular band alignments of these systems. The valence band offset has b...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2016