Author/Authors :
M.A. Migliorato، نويسنده , , M.J. Steer، نويسنده , , W.M. Soong، نويسنده , , C.M. Tey، نويسنده , , H-Y. Liu، نويسنده , , S.L Liew، نويسنده , , P. Navaretti، نويسنده , , D.J. Norris، نويسنده , , A.G. Cullis، نويسنده , , M. Hopkinson، نويسنده ,
Abstract :
We discuss a novel approach to the optimisation of quantum dot bilayer structures grown by molecular beam epitaxy. Use of a kinetic segregation model has shown that a reduction of the In composition for the upper layer of a bilayer structure can be used to compensate for the excess In that exists on the surface prior to growth. Three samples have been grown with upper dot In compositions varying from 90% to 100% and have been investigated by means of optical spectroscopy and electron microscopy.
