Induced absorption dynamics in quantum dot based waveguide electroabsorbers

T. Piwonski; J. Pulka; E. A. Viktorov; G. Huyet; R. J. Manning; J. Houlihan; P. Mandel; T. Erneux

doi:10.1063/1.3491805

Induced absorption dynamics in quantum dot based waveguide electroabsorbers

T. Piwonski
, J. Pulka
, E. A. Viktorov
, G. Huyet
, R. J. Manning
, J. Houlihan
, P. Mandel
, T. Erneux

Munster Technological University
University College Cork
South East Technological University
Université libre de Bruxelles

Research output: Contribution to journal › Article › peer-review

Abstract

Two-color pump-probe measurements are used to study the carrier dynamics of InAs/GaAs quantum dots in a waveguide structure under reverse bias conditions. For the case of initially populating the ground state (GS), we find relaxation dynamics that include both absorptive and bleaching components in the excited state (ES) wavelength range. We reproduce the main features of this induced absorption dynamics using a simple model with an additional term for induced absorption at the ES due to carriers injected at the GS. The induced absorption dynamics includes multiple recovery timescales which can be attributed to phonon-assisted processes of GS/ES interaction.

Original language	English
Article number	121103
Journal	Applied Physics Letters
Volume	97
Issue number	12
DOIs	https://doi.org/10.1063/1.3491805
Publication status	Published - 20 Sep 2010
Externally published	Yes

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10.1063/1.3491805

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title = "Induced absorption dynamics in quantum dot based waveguide electroabsorbers",

abstract = "Two-color pump-probe measurements are used to study the carrier dynamics of InAs/GaAs quantum dots in a waveguide structure under reverse bias conditions. For the case of initially populating the ground state (GS), we find relaxation dynamics that include both absorptive and bleaching components in the excited state (ES) wavelength range. We reproduce the main features of this induced absorption dynamics using a simple model with an additional term for induced absorption at the ES due to carriers injected at the GS. The induced absorption dynamics includes multiple recovery timescales which can be attributed to phonon-assisted processes of GS/ES interaction.",

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AU - Piwonski, T.

AU - Pulka, J.

AU - Viktorov, E. A.

AU - Huyet, G.

AU - Manning, R. J.

AU - Houlihan, J.

AU - Mandel, P.

AU - Erneux, T.

PY - 2010/9/20

Y1 - 2010/9/20

N2 - Two-color pump-probe measurements are used to study the carrier dynamics of InAs/GaAs quantum dots in a waveguide structure under reverse bias conditions. For the case of initially populating the ground state (GS), we find relaxation dynamics that include both absorptive and bleaching components in the excited state (ES) wavelength range. We reproduce the main features of this induced absorption dynamics using a simple model with an additional term for induced absorption at the ES due to carriers injected at the GS. The induced absorption dynamics includes multiple recovery timescales which can be attributed to phonon-assisted processes of GS/ES interaction.

AB - Two-color pump-probe measurements are used to study the carrier dynamics of InAs/GaAs quantum dots in a waveguide structure under reverse bias conditions. For the case of initially populating the ground state (GS), we find relaxation dynamics that include both absorptive and bleaching components in the excited state (ES) wavelength range. We reproduce the main features of this induced absorption dynamics using a simple model with an additional term for induced absorption at the ES due to carriers injected at the GS. The induced absorption dynamics includes multiple recovery timescales which can be attributed to phonon-assisted processes of GS/ES interaction.

UR - https://www.scopus.com/pages/publications/77957135922

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DO - 10.1063/1.3491805

M3 - Article

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SN - 0003-6951

VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 12

M1 - 121103

ER -

Induced absorption dynamics in quantum dot based waveguide electroabsorbers

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