Ultrashort Mach-Zehnder space switch based on quantum dots

Ravindran Prasanth; Jos E. Haverkort; Joachim H. Wolter

doi:10.1117/12.536777

26 July 2004 Ultrashort Mach-Zehnder space switch based on quantum dots

Ravindran Prasanth, Jos E. Haverkort, Joachim H. Wolter

Proceedings Volume 5383, Smart Structures and Materials 2004: Modeling, Signal Processing, and Control; (2004) https://doi.org/10.1117/12.536777
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

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.

Citation Download Citation

Ravindran Prasanth, Jos E. Haverkort, and Joachim H. Wolter "Ultrashort Mach-Zehnder space switch based on quantum dots", Proc. SPIE 5383, Smart Structures and Materials 2004: Modeling, Signal Processing, and Control, (26 July 2004); https://doi.org/10.1117/12.536777

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