Abstract

We report on a photoluminescence (PL) band at around 2.2 eV for rutile through an Ar +-ion laser excitation. The PL consists of two sub-bands which are located at 2.22 eV and 2.28 eV , respectively, and have bandwidths of 0.06– 0.07 eV . The emission and absorption band shapes, which are composed of two asymmetrically distorted sub-peaks, are examined and considered in detail. The PL emissions are proved to originate in the localized states and the Stokes shift are estimated to be 0.12–0.16 and 0.15 eV . The radiative centres for these PL are found to be those reported for the interstitial Ti 3+ ions.

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