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Nanoscale Cubic Growth Of SrS Codoped With Eu And Sm On MgO (001) For Optical Memory Materials
Journal article   Peer reviewed

Nanoscale Cubic Growth Of SrS Codoped With Eu And Sm On MgO (001) For Optical Memory Materials

C. Chen, K.L. Teo, National University of Singapore Department of Electrical and Computer Engineering and T.C. Chong
AIP conference proceedings, Vol.772(1), pp.157-158
30/06/2005
DOI: https://doi.org/10.1063/1.1994041

Abstract

CRYSTAL GROWTH DEPOSITION DOPED MATERIALS EUROPIUM FILMS GRAIN SIZE INFRARED RADIATION LAYERS LUMINESCENCE MAGNESIUM OXIDES MATERIALS SCIENCE MOLECULAR BEAM EPITAXY NANOSTRUCTURES OXYGEN SAMARIUM SEMICONDUCTOR MATERIALS STRONTIUM SULFIDES SUBSTRATES TEMPERATURE RANGE 0273-0400 K TEMPERATURE RANGE 0400-1000 K VISIBLE RADIATION
We report the epitaxial growth of SrS co-doped with Eu and Sm (abbreviated as SrS:Eu,Sm) by solid-source molecular-beam epitaxy. The SrS films show that the crystallites are in regular cubic shape with ordered arrangement in [100] direction. The grain size was found to increase with deposition time at a fixed substrate temperature. The infrared stimulated luminescence with a peak at 620 nm can be observed at room temperature in SrS: Eu, Sm which is stimulated with infrared light after irradiation with visible light. Our results indicate the optimum substrate temperature to obtain the strong ISL emission intensity is at substrate temperature of 500 deg. C.

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