Research output: Contribution to journal › Article
Effect of irradiation by He+ and Ga+ ions on the 2D-exciton susceptibility of InGaAs/GaAs quantum-well structures. / Kapitonov, Yu. V.; Shapochkin, P. Yu.; Petrov, Yu. V.; Efimov, Yu. P.; Eliseev, S. A.; Dolgikh, Yu. K.; Petrov, V. V.; Ovsyankin, V. V.
In: Physica Status Solidi (B): Basic Research, Vol. 252, No. 9, 2015, p. 1950-1954.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Effect of irradiation by He+ and Ga+ ions on the 2D-exciton susceptibility of InGaAs/GaAs quantum-well structures
AU - Kapitonov, Yu. V.
AU - Shapochkin, P. Yu.
AU - Petrov, Yu. V.
AU - Efimov, Yu. P.
AU - Eliseev, S. A.
AU - Dolgikh, Yu. K.
AU - Petrov, V. V.
AU - Ovsyankin, V. V.
PY - 2015
Y1 - 2015
N2 - The effect of irradiation by 30-keV Ga+ and 35-keV He+ ions (in relatively small doses) on the excitonic reflectivity spectra of single InGaAs/GaAs quantum-well structures is studied. It is found that the irradiation results in decreasing intensity and broadening of the excitonic resonances in the reflectivity spectra for all the doses. It is shown that these changes are not related to a decrease of the exciton transition oscillator strength and, therefore, to the irradiation-induced destruction of the excitonic states, but can be rather ascribed to a common cause, namely, to inhomogeneous broadening of the excitonic resonances proportional to the exposure dose. A tentative model of the irradiation-induced broadening is considered, with the mechanism of the process being a consequence of scattering of the 2D excitons by structural defects associated with Ga(In) and As vacancies arising upon collisions of the high-energy ions with regular atoms of the crystal structure. The model is used to compare experimenta
AB - The effect of irradiation by 30-keV Ga+ and 35-keV He+ ions (in relatively small doses) on the excitonic reflectivity spectra of single InGaAs/GaAs quantum-well structures is studied. It is found that the irradiation results in decreasing intensity and broadening of the excitonic resonances in the reflectivity spectra for all the doses. It is shown that these changes are not related to a decrease of the exciton transition oscillator strength and, therefore, to the irradiation-induced destruction of the excitonic states, but can be rather ascribed to a common cause, namely, to inhomogeneous broadening of the excitonic resonances proportional to the exposure dose. A tentative model of the irradiation-induced broadening is considered, with the mechanism of the process being a consequence of scattering of the 2D excitons by structural defects associated with Ga(In) and As vacancies arising upon collisions of the high-energy ions with regular atoms of the crystal structure. The model is used to compare experimenta
U2 - 10.1002/pssb.201451611
DO - 10.1002/pssb.201451611
M3 - Article
VL - 252
SP - 1950
EP - 1954
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
IS - 9
ER -
ID: 3948781