Two-photon-absorption-assisted Tera Hertz optical gain modulation in quantum-dot optical amplifiers

H. Ju; A.V. Uskov; Z. Li; J. Molina Vázquez; R. Nötzel; D. Lenstra; G.D. Khoe; H.J.S. Dorren

doi:10.1016/j.physe.2005.12.119

Two-photon-absorption-assisted Tera Hertz optical gain modulation in quantum-dot optical amplifiers

H. Ju, A.V. Uskov, Z. Li, J. Molina Vázquez, R. Nötzel, D. Lenstra, G.D. Khoe, H.J.S. Dorren

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Abstract

Ultrafast carrier dynamics is examined in a quantum-dot (QD) semiconductor optical amplifier with a rate equation model which includes two-photon absorption (TPA) and gain bleaching during the propagation of 120 fs optical pulses at the wavelength near telecommunication wavebands. The TPA-generated carriers in the bulk region of the waveguide relax to the QDs via the wetting layer, which occurs synchronously in time and space with QD carrier depletion. This leads to efficient enhancement of the rate of carrier capture into the QDs, reducing the pattern effects for ultra high-speed optical signal processing.

Original language	English
Pages (from-to)	543-546
Number of pages	4
Journal	Physica E: Low-Dimensional Systems & Nanostructures
Volume	32
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physe.2005.12.119
Publication status	Published - 2006

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title = "Two-photon-absorption-assisted Tera Hertz optical gain modulation in quantum-dot optical amplifiers",

abstract = "Ultrafast carrier dynamics is examined in a quantum-dot (QD) semiconductor optical amplifier with a rate equation model which includes two-photon absorption (TPA) and gain bleaching during the propagation of 120 fs optical pulses at the wavelength near telecommunication wavebands. The TPA-generated carriers in the bulk region of the waveguide relax to the QDs via the wetting layer, which occurs synchronously in time and space with QD carrier depletion. This leads to efficient enhancement of the rate of carrier capture into the QDs, reducing the pattern effects for ultra high-speed optical signal processing.",

author = "H. Ju and A.V. Uskov and Z. Li and {Molina V{\'a}zquez}, J. and R. N{\"o}tzel and D. Lenstra and G.D. Khoe and H.J.S. Dorren",

year = "2006",

doi = "10.1016/j.physe.2005.12.119",

language = "English",

volume = "32",

pages = "543--546",

journal = "Physica E: Low-Dimensional Systems & Nanostructures",

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TY - JOUR

T1 - Two-photon-absorption-assisted Tera Hertz optical gain modulation in quantum-dot optical amplifiers

AU - Ju, H.

AU - Uskov, A.V.

AU - Li, Z.

AU - Molina Vázquez, J.

AU - Nötzel, R.

AU - Lenstra, D.

AU - Khoe, G.D.

AU - Dorren, H.J.S.

PY - 2006

Y1 - 2006

N2 - Ultrafast carrier dynamics is examined in a quantum-dot (QD) semiconductor optical amplifier with a rate equation model which includes two-photon absorption (TPA) and gain bleaching during the propagation of 120 fs optical pulses at the wavelength near telecommunication wavebands. The TPA-generated carriers in the bulk region of the waveguide relax to the QDs via the wetting layer, which occurs synchronously in time and space with QD carrier depletion. This leads to efficient enhancement of the rate of carrier capture into the QDs, reducing the pattern effects for ultra high-speed optical signal processing.

AB - Ultrafast carrier dynamics is examined in a quantum-dot (QD) semiconductor optical amplifier with a rate equation model which includes two-photon absorption (TPA) and gain bleaching during the propagation of 120 fs optical pulses at the wavelength near telecommunication wavebands. The TPA-generated carriers in the bulk region of the waveguide relax to the QDs via the wetting layer, which occurs synchronously in time and space with QD carrier depletion. This leads to efficient enhancement of the rate of carrier capture into the QDs, reducing the pattern effects for ultra high-speed optical signal processing.

U2 - 10.1016/j.physe.2005.12.119

DO - 10.1016/j.physe.2005.12.119

M3 - Article

VL - 32

SP - 543

EP - 546

JO - Physica E: Low-Dimensional Systems & Nanostructures

JF - Physica E: Low-Dimensional Systems & Nanostructures

SN - 1386-9477

IS - 1-2

ER -

Two-photon-absorption-assisted Tera Hertz optical gain modulation in quantum-dot optical amplifiers

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