The effect of neutron irradiation on the structural, optical, and electronic properties of doped strained heterostructures with AlGaAs/InGaAs/GaAs and AlGaAs/InGaAs/AlGaAs quantum wells was experimentally studied. Heterostructures with a two-dimensional electron gas of different layer constructions were subjected to neutron irradiation in the reactor channel with the fluence range of 2 × 10 cm ÷ 1.2 × 10 cm.
View Article and Find Full Text PDFSemiconductor quantum dots (QDs) are known for their high two-photon absorption (TPA) capacity. This allows them to efficiently absorb infrared photons with energies lower than the bandgap energy. Moreover, TPA in QDs can be further enhanced by the interaction of excitons of the QDs with plasmons of a metal nanoparticle.
View Article and Find Full Text PDFAn investigation of the population of districts of the Yaroslavl region with the help of ultrasonic screening has shown high efficiency of this method as compared with traditional ones for the assessment of the state of stromous endemic. The investigation allowed a conclusion to be made of changes in the endemic structure, of low efficiency of prophylactic means and necessity of the development of new measures having first of all the ecological significance.
View Article and Find Full Text PDF