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(a) Potential profile of nonrelaxed QDs. For conduction band only points are shown. The arrows indicate the directions of the energy shift when an external biaxial tensile strain is applied. (b) Lateral view of the pressure cell. A mask with a diameter hole was used to select the luminescence at the center of the sample.
Strain dependence of PL spectra measured at for samples grown at (a) 700 and (b) . The spectra are shifted vertically for ease of viewing. The fine structures in the spectra of (b) are due to the water absorption. (c) The energy shift of the PL peak position vs strain.
Description of the samples.
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