Mixed state effects in waveguide electro-absorbers based on quantum dots

Piwonski, T. and Pulka, J. and Huyet, G. and Houlihan, John and Viktorov, Evgeny A. and Erneux, T. (2011) Mixed state effects in waveguide electro-absorbers based on quantum dots. Applied Physics Letters, 99 (17). p. 3. ISSN 0003-6951

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Multi-pulse heterodyne pump-probe measurements are used to investigate the reverse bias dynamics of InAs/GaAs quantum dots in a waveguide structure. Using a femtosecond pulse, we simultaneously populate high energy ground states and low energy excited states and measure the resulting gain and phase dynamics over the bandwidth of the pulse. We identify a similar to 5 ps timescale in the phase dynamics which can be associated with low energy ground states outside the pulse bandwidth and may provide an explanation for the deterioration of monolithic mode locked laser performance at high reverse voltages. (C) 2011 American Institute of Physics. [doi:10.1063/1.3653287]

Item Type: Article
Additional Information: ISI Document Delivery No.: 841NG Times Cited: 0 Cited Reference Count: 18 Piwonski, T. Pulka, J. Huyet, G. Houlihan, J. Viktorov, E. A. Erneux, T. Science Foundation Ireland (SFI) [SFI 07/IN.1/I929]; INSPIRE Programme; Irish Government; Institute of Technology Ireland; Fond National de la Recherche Scientifique; Air Force Office of Scientific Research (AFOSR) [FA8655-09-1-3068] The authors would like to thank Bryan Kelleher for proof reading the manuscript. This study has been supported by Science Foundation Ireland (SFI) under the contract number SFI 07/IN.1/I929, the INSPIRE Programme, funded by the Irish Government's Programme for Research in Third Level Institutions, Cycle 4, National Development Plan 2007-2013, and the Institute of Technology Ireland's Strand I Programme and the Tyndall National Access Program. In Belgium, support was provided by the Fond National de la Recherche Scientifique. T. Erneux was also supported by the Air Force Office of Scientific Research (AFOSR) grant FA8655-09-1-3068. AMER INST PHYSICS MELVILLE
Uncontrolled Keywords: LASERS
Departments or Groups: Optics Research Group
Divisions: School of Science > Department of Computing, Maths and Physics
Depositing User: John Houlihan
Date Deposited: 19 Nov 2012 16:19
Last Modified: 22 Aug 2016 10:26
URI: http://repository-testing.wit.ie/id/eprint/1997

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