Coherent and Phonon-assisted Tunnelling in Asymmetric Double Barrier Resonant Tunnelling Structures
نویسندگان
چکیده
منابع مشابه
Formation dynamics of neutral and negatively charged excitons in double barrier resonant tunnelling structures
In this work we study the formation of neutral and negatively charged excitons in double barrier resonant tunnelling structures, by analyzing the dependence of photoluminescence emission on excitation intensity. At low excitation intensities, the negatively charged to neutral exciton intensity ratio depends linearly on the current, suggesting the validity of the concept of thermal equilibrium i...
متن کاملFrequency dependence of acoustic phonon-assisted tunnelling in semiconductor superlattices
In recent experiments [1,2] we have shown that the change in tunnel current, ∆I(V), through a GaAs/AlAs SL produced by a non-equilibrium acoustic phonon pulse has a maximum at a bias voltage V which varies linearly with the characteristic temperature of the phonon distribution. The form of ∆I(V) is in reasonable agreement with calculations by Glavin et al. [3]. While the experiments clearly sho...
متن کاملResonant Tunnelling Optoelectronic Circuits
Nowadays, most communication networks such as local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs) have replaced or are about to replace coaxial cable or twisted copper wire with fiber optical cables. Light-wave communication systems comprise a transmitter based on a visible or near-infrared light source, whose carrier is modulated by the information sign...
متن کاملThermally activated resonant tunnelling in GaAs/AlGaAs triple barrier heterostructures
We report the observation of a thermally activated resonant tunnelling feature in the current– voltage characteristics (I(V)) of triple barrier resonant tunnelling structures (TBRTS) due to the alignment of the n = 1 confined states of the two quantum wells within the active region. With great renewed interest in tunnelling structures for high frequency (THz) operation, the understanding of dev...
متن کاملComplex–barrier Tunnelling times *
In this paper we calculate the analytic expression of the phase time for the scattering of an electron off a complex square barrier. As is well known the (negative) imaginary part of the potential takes into account, phenomenologically, the absorption. We investigate the Hartman-Fletcher effect, and find that it is suppressed by the presence of a (not negligible) imaginary potential. In fact, w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 2000
ISSN: 0004-9506
DOI: 10.1071/ph99037