Selective analysis of the elemental composition of InGaAs/GaAs nanoclusters by secondary ion mass spectrometry


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Abstract

New possibilities of the method of secondary ion mass spectrometry (SIMS) in application to quantitative analysis of the atomic composition of InGaAs nanoclusters in GaAs matrix are considered. Using InxGa1–xAs test structures, nonlinear calibration dependences of the yield of secondary In2As and InAs ions on the concentration of indium have been determined, which do not involve normalization to the matrix elements (Ga or As) and make possible selective analysis of the composition of nanoclusters. Using these relations, quantitative depth profiles of indium concentration were measured and statistical characteristics of the arrays of nanoclusters in InGaAs/GaAs heterostructures were determined.

About the authors

M. N. Drozdov

Institute for Physics of Microstructures

Author for correspondence.
Email: drm@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950

V. M. Danil’tsev

Institute for Physics of Microstructures

Email: drm@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950

Yu. N. Drozdov

Institute for Physics of Microstructures

Email: drm@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950

O. I. Khrykin

Institute for Physics of Microstructures

Email: drm@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950

P. A. Yunin

Institute for Physics of Microstructures

Email: drm@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950

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