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Proceedings Paper

Ultrashort Mach-Zehnder space switch based on quantum dots
Author(s): Ravindran Prasanth; Jos E. Haverkort; Joachim H. Wolter
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Paper Abstract

We investigate whether the discrete energy levels and the high peak absorption in quantum dots (QDs) provide an opportunity for increasing the electro-optic and nonlinear optical properties. For this purpose we calculate the electrorefraction spectra of QDs starting from the Luttinger-Kohn Hamiltonian and using a plane-wave expansion for solving the eigenstates of the QD. For a pyramidal InAs/GaAs quantum dot, we find a high peak electrorefraction of 0.35 for TE-polarization, which is 35x larger than in a quantum well. In the tail of the quantum dot absorption spectrum, we find an electrorefraction of 1.3.10-2 at an absorption loss of 0.15 dB/cm. Finally we investigate the refractive index variation due to state filling in InAs/InP cylindrical quantum dots.

Paper Details

Date Published: 26 July 2004
PDF: 8 pages
Proc. SPIE 5383, Smart Structures and Materials 2004: Modeling, Signal Processing, and Control, (26 July 2004); doi: 10.1117/12.536777
Show Author Affiliations
Ravindran Prasanth, Technische Univ. Eindhoven (Netherlands)
Jos E. Haverkort, Technische Univ. Eindhoven (Netherlands)
Joachim H. Wolter, Technische Univ. Eindhoven (Netherlands)

Published in SPIE Proceedings Vol. 5383:
Smart Structures and Materials 2004: Modeling, Signal Processing, and Control
Ralph C. Smith, Editor(s)

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