Refractive index dynamics of quantum dot based waveguide electroabsorbers

Tomasz Piwonski, Jaroslaw Pulka, Evgeny A. Viktorov, Guillaume Huyet, John Houlihan

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The refractive index dynamics of InAs/GaAs quantum dot based waveguide absorbers is studied using heterodyne pump-probe measurements. Absorption reduction due to the pump can be accompanied by either positive or negative refractive index changes depending on the wavelength used. This change in sign of the phase amplitude coupling can be understood by considering the atomlike nature of the quantum dot transitions involved. (C) 2010 American Institute of Physics. [doi:10.1063/1.3476347]
Original languageEnglish
Article number051107
Pages (from-to)3
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 02 Aug 2010




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