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

BioAnalytical Chemistry

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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

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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",

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

language = "English",

volume = "259",

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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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