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

H. K. Ju; A. V. Uskov; Z. Li; J. M. Vazquez; R. Notzel; 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. K. Ju
, A. V. Uskov
, Z. Li
, J. M. Vazquez
, R. Notzel
, D. Lenstra
, G.D. Khoe
, H.J.S. Dorren

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

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 and Nanostructures
Volume	32
Issue number	1/2
Early online date	2 Feb 2006
DOIs	https://doi.org/10.1016/j.physe.2005.12.119
Publication status	Published - May 2006

Bibliographical note

Part of special issue: Proceedings of the 12th International Conference on Modulated Semiconductor Structures. Edited by E.L. Hu

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.1016/j.physe.2005.12.119

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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.",

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AU - Ju, H. K.

AU - Uskov, A. V.

AU - Li, Z.

AU - Vazquez, J. M.

AU - Notzel, R.

AU - Lenstra, D.

AU - Khoe, G.D.

AU - Dorren, H.J.S.

N1 - Part of special issue: Proceedings of the 12th International Conference on Modulated Semiconductor Structures. Edited by E.L. Hu

PY - 2006/5

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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.

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DO - 10.1016/j.physe.2005.12.119

M3 - Article

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JO - Physica E. Low-dimensional Systems and Nanostructures

JF - Physica E. Low-dimensional Systems and Nanostructures

IS - 1/2

ER -

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

Abstract

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