Calculated optical transitions in a silicon quantum wire modulated by a quantum dot

  • Xanthippi Zianni
  • Androula G. Nassiopoulou


The photoluminescence lifetimes of Si quantum wires and dots have been previously calculated within a continuum model that takes into account the anisotropy of silicon band structure. Here, we present our calculations on the optical transitions in Si quantum wires modulated by a quantum dot. The geometrical parameters of the buldged wire are appropriate for porous Si and the ground state is localized. The photoluminescence lifetimes are calculated and compared with those of straight wires and dots. The magnitude of the lifetime is sensitive to the structural parameters of the nanostructures. Lifetimes varying from nanoseconds to milliseconds have been obtained. The results of the calculations provide insight to the optical properties of Si nanostructures.


Porous Silicon Quantum Wire Straight Wire Silicon Wire Porous Silicon Nanostructure 
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The present work has been co-funded by European Community funds and by National funds (E.P.E.A.E.K.), under the ‘Archimides’ programme.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Applied SciencesTechnological Educational Institution of ChalkidaPsachnaGreece
  2. 2.Institute of Microelectronics (IMEL), NCSR ‘Demokritos’AthensGreece

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