quantum well structures
A THEORETICAL STUDY OF TRIPLE QUANTUM WELL STRUCTURES UNDER EXTERNAL FIELDS
... Abstract: Using theoretical formalism of A. Large etal [Semicond. Sci. Technol. 2002], we have studied the shallow donor impurity in triple quantum well structures. We have used the effective mass ...
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Intersubband terahertz transitions in Landau level system of cascade GaAs/AlGaAs quantum well structures in strong tilted magnetic field
... Finally, the terahertz transitions between Landau levels of different subbands in resonant tunneling quantum well structures in a tilted magnetic field were considered. An effective way was proposed ...
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Interwell relaxation times in p-Si/SiGe asymmetric quantum well structures: the role of interface roughness
... asymmetric quantum well structures designed to access spatially indirect (diagonal) interwell transitions between heavy-hole ground states, at photon energies below the optical phonon ...different ...
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Designing strain-balanced GaN/AlGaN quantum well structures: Application to intersubband devices at 1.3 and 1.55 mu m wavelengths
... GaN/AlGaN quantum well structures are considered with regard to their potential application in optoelectronic devices working at communication ...strain-balanced structures are presented in ...
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Dilute magnetic semiconductor quantum-well structures for magnetic field tunable far-infrared/terahertz absorption
... pare quantum-well structures based upon these materials, op- erating as photodetectors, against bolometers, the latter has a very high responsivity at a few kelvin and does not require an external ...
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Tunable Multi-Channel Filtering Using 1-D Photonic Quantum Well Structures
... Abstract—In the present study, we show that it is possible to achieve multi-channel filters in one-dimensional photonic crystals using photonic quantum well structures. The photonic quantum ...
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Investigation of narrow band semiconductor quantum well structures using a synchronously pumped optical parametric oscillator
... As for the room temperature data, the large difference in electron spin life- time between these two systems may possibly be understood using the original explanation given in Guettler et al.[38]. The quantum ...
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Engineering the exciton linewidth in II VI quantum well structures
... or 2-D binding energy is four times greater than the bulk or 3-D case.3 In forming real quantum well materials, we wish to choose structures such that the binding energy is substantially[r] ...
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Theoretical studies of wavepacket propagation in semiconductor quantum well structures
... For double barrier systems containing one resonance the behaviour of the resonant current can be predicted using a model transmission coefficient which contains the main features of a re[r] ...
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Effect of triplet multiple quantum well structures on the performance of blue phosphorescent organic light emitting diodes
... exciton confinement inside recombination zones by using a triplet multiple quantum structure. The triplet energies of mCP and TPBi are higher than those of FIr- pic. Therefore, triplet multiple quantum ...
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Circular and linear photogalvanic effects in type II GaSb/InAs quantum well structures in the inverted regime
... Fig. 4. The similar behaviour is also observed for the transverse and longitudi- nal photocurrents induced by linearly polarized radiation, see Fig. 3 showing the dependence of the transverse photocurrent on the angle of ...
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Magnetotransport study on as grown and annealed n and p type modulation doped GaInNAs/GaAs strained quantum well structures
... latory magnetoresistivity, zero-field resistivity, Fermi en- ergy, first subband energy, cyclotron frequency, effective mass, quantum lifetime of 2D carriers, and carrier mo- bility, respectively. The i represents ...
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Cathodoluminescence studies of chevron features in semi-polar (11-22) InGaN/GaN multiple quantum well structures
... semi-polar structures, a blue- emitting multiple quantum well structure, and an amber-emitting light-emitting ...the quantum wells (QWs) in this ...
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A study of photomodulated reflectance on staircase like, n doped GaAs/Alx Ga1−xAs quantum well structures
... In this work, photomodulated reflectance (PR) and photoluminescence (PL) experiments were carried out on two different staircase-like QWIP structures at room temperature. PR is a powerful characterization method ...
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Magnetotransport phenomena in modulation doped n-channel Si/Si0.7Ge0.3 quantum well structures
... possible choice in te rm s of high-speed perform ance, th ey are not well suited w hen combined w ith n-channel FETs employing a p u re Si ch an n el for CMOS. For th is reason m ost resea rch on p-channel M ...
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Cathodoluminescence hyperspectral imaging of trench-like defects in InGaN/GaN quantum well structures
... cathodoluminescence (CL) hyperspectral imaging to study InGaN/GaN multiple quantum well (MQW) structures. Different types of trench defects with varying trench width, namely wide or narrow trenches ...
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MBE grown GaAsBi/GaAs multiple quantum well structures : structural and optical characterization
... of each diode suggest that strain relaxation and a loss of quantum con fi nement have occurred in the diodes with more than 40 QWs. The GaAsBi/GaAs MQWs appear to relax at a similar average strain – thickness ...
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Transport properties of modulation-doped Si/SiGe quantum well structures
... entary quantum m echanical description of the m odulation- doped n- and p-type ...as well as the exponential envelop function of the ...corresponding structures can be analyzed. In n-type ...
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Excitation energy dependent nature of Raman scattering spectrum in GaInNAs/GaAs quantum well structures
... causes a large redshift of the band gap; therefore, in- corporation of N into the III-V lattice brings more flexibility to tailor the band gap of the material [5]. However, the optical quality of dilute nitrides is ...
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Electronic and Photonic Band Engineering for Novel Optoelectronic and Nanophotonic Devices
... based quantum-well structures are calculated based on the Rashba-Sheka-Pikus (RSP) Hamiltonian in the vicinity of the Γ point since the simple parabolic model is very poor to fit the valence band ...
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