Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide

H. K. Ju; J. M. Vazquez; Z. Li; R. Notzel; T.C. de Vries; D. Lenstra; Q. Gong; P. J. van Veldhoven; J. H. Wolter; G.D. Khoe; H.J.S. Dorren

doi:10.1016/j.optcom.2005.09.058

Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide

H. K. Ju
, J. M. Vazquez
, Z. Li
, R. Notzel
, T.C. de Vries
, D. Lenstra
, Q. Gong
, P. J. van Veldhoven
, J. H. Wolter
, G.D. Khoe
, H.J.S. Dorren

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

We investigate carrier dynamics in a passive InAs/InP quantum dot (QD) waveguide using 255 fs optical pulses at a central wavelength of 1568 nm. We observe strong anisotropy of absorption saturation for different polarizations. Pump-probe measurements indicate the presence of carrier relaxation dynamics on a timescale in the order of tens of picoseconds due to cascaded relaxation of carriers generated by two-photon absorption (TPA) from the bulk region to the QDs via the wetting layer. These relaxation timescales are much longer than in QD amplifiers. Our observations are supported by a rate-equation model which includes TPA, showing good agreement with the pump-probe measurements. © 2005 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	861-867
Journal	Optics Communications
Volume	259
Issue number	2
DOIs	https://doi.org/10.1016/j.optcom.2005.09.058
Publication status	Published - 2006

Bibliographical note

Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide

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10.1016/j.optcom.2005.09.058

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title = "Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide",

abstract = "We investigate carrier dynamics in a passive InAs/InP quantum dot (QD) waveguide using 255 fs optical pulses at a central wavelength of 1568 nm. We observe strong anisotropy of absorption saturation for different polarizations. Pump-probe measurements indicate the presence of carrier relaxation dynamics on a timescale in the order of tens of picoseconds due to cascaded relaxation of carriers generated by two-photon absorption (TPA) from the bulk region to the QDs via the wetting layer. These relaxation timescales are much longer than in QD amplifiers. Our observations are supported by a rate-equation model which includes TPA, showing good agreement with the pump-probe measurements. {\textcopyright} 2005 Elsevier B.V. All rights reserved.",

author = "Ju, \{H. K.\} and Vazquez, \{J. M.\} and Z. Li and R. Notzel and \{de Vries\}, T.C. and D. Lenstra and Q. Gong and \{van Veldhoven\}, \{P. J.\} and Wolter, \{J. H.\} and G.D. Khoe and H.J.S. Dorren",

note = "Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide",

year = "2006",

doi = "10.1016/j.optcom.2005.09.058",

language = "English",

volume = "259",

pages = "861--867",

journal = "Optics Communications",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide

AU - Ju, H. K.

AU - Vazquez, J. M.

AU - Li, Z.

AU - Notzel, R.

AU - de Vries, T.C.

AU - Lenstra, D.

AU - Gong, Q.

AU - van Veldhoven, P. J.

AU - Wolter, J. H.

AU - Khoe, G.D.

AU - Dorren, H.J.S.

N1 - Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide

PY - 2006

Y1 - 2006

N2 - We investigate carrier dynamics in a passive InAs/InP quantum dot (QD) waveguide using 255 fs optical pulses at a central wavelength of 1568 nm. We observe strong anisotropy of absorption saturation for different polarizations. Pump-probe measurements indicate the presence of carrier relaxation dynamics on a timescale in the order of tens of picoseconds due to cascaded relaxation of carriers generated by two-photon absorption (TPA) from the bulk region to the QDs via the wetting layer. These relaxation timescales are much longer than in QD amplifiers. Our observations are supported by a rate-equation model which includes TPA, showing good agreement with the pump-probe measurements. © 2005 Elsevier B.V. All rights reserved.

AB - We investigate carrier dynamics in a passive InAs/InP quantum dot (QD) waveguide using 255 fs optical pulses at a central wavelength of 1568 nm. We observe strong anisotropy of absorption saturation for different polarizations. Pump-probe measurements indicate the presence of carrier relaxation dynamics on a timescale in the order of tens of picoseconds due to cascaded relaxation of carriers generated by two-photon absorption (TPA) from the bulk region to the QDs via the wetting layer. These relaxation timescales are much longer than in QD amplifiers. Our observations are supported by a rate-equation model which includes TPA, showing good agreement with the pump-probe measurements. © 2005 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.optcom.2005.09.058

DO - 10.1016/j.optcom.2005.09.058

M3 - Article

SN - 0030-4018

VL - 259

SP - 861

EP - 867

JO - Optics Communications

JF - Optics Communications

IS - 2

ER -

Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide

Abstract

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