The optical anisotropy of the In-rich InAs(001) surface has been studied by the use of reflectance anisotropy spectrocopy. The main spectral line, which is assigned to an optical transition involving In-dimers surface states, is shown to be very sensitive to the adsorption of molecular oxygen at low temperature. The progressive disappearance of the dimer line as a function of oxygen exposure is explained by the chemisorption of oxygen molecules on the In-dimer sites.

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Volume188, Issue4

December 2001

Pages 1417-1421

Optical Investigation of the Clean and Oxidized In-Rich Surface of InAs(001)

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Optical Investigation of the Clean and Oxidized In-Rich Surface of InAs(001)

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