Effects of two-photon absorption on carrier dynamics in quantum-dot optical amplifiers

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

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

26 Citaties (Scopus)

Uittreksel

We investigate ultrafast gain-dynamics in a quantum-dot (QD) semiconductor optical amplifier where two-photon absorption (TPA) occurs in the bulk region of the waveguide during propagation of a sub-picosecond optical pulse, and gain bleaching occurs in the QD active region. Our calculation reveals that TPA provides optical pumping which is quasi-synchronous in time and space with QD carrier depletion, leading to enhancement of carrier capture into the QDs on an ultrafast timescale. The TPA-induced optical pumping, which is qualitatively different from electrical pumping, changes qualitatively carrier recovery dynamics, reducing pattern effects when a train of optical pulses is injected at the ultra-high speed.
Originele taal-2Engels
Pagina's (van-tot)615-620
Aantal pagina's6
TijdschriftApplied Physics B: Lasers and Optics
Volume82
Nummer van het tijdschrift4
DOI's
StatusGepubliceerd - 2006

Vingerafdruk

light amplifiers
quantum dots
optical pumping
photons
bleaching
pulses
depletion
pumping
recovery
high speed
waveguides
propagation
augmentation

Citeer dit

Ju, H. ; Uskov, A.V. ; Nötzel, R. ; Li, Z. ; Molina Vázquez, J. ; Lenstra, D. ; Khoe, G.D. ; Dorren, H.J.S. / Effects of two-photon absorption on carrier dynamics in quantum-dot optical amplifiers. In: Applied Physics B: Lasers and Optics. 2006 ; Vol. 82, Nr. 4. blz. 615-620.
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abstract = "We investigate ultrafast gain-dynamics in a quantum-dot (QD) semiconductor optical amplifier where two-photon absorption (TPA) occurs in the bulk region of the waveguide during propagation of a sub-picosecond optical pulse, and gain bleaching occurs in the QD active region. Our calculation reveals that TPA provides optical pumping which is quasi-synchronous in time and space with QD carrier depletion, leading to enhancement of carrier capture into the QDs on an ultrafast timescale. The TPA-induced optical pumping, which is qualitatively different from electrical pumping, changes qualitatively carrier recovery dynamics, reducing pattern effects when a train of optical pulses is injected at the ultra-high speed.",
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Effects of two-photon absorption on carrier dynamics in quantum-dot optical amplifiers. / Ju, H.; Uskov, A.V.; Nötzel, R.; Li, Z.; Molina Vázquez, J.; Lenstra, D.; Khoe, G.D.; Dorren, H.J.S.

In: Applied Physics B: Lasers and Optics, Vol. 82, Nr. 4, 2006, blz. 615-620.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

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AU - Ju, H.

AU - Uskov, A.V.

AU - Nötzel, R.

AU - Li, Z.

AU - Molina Vázquez, J.

AU - Lenstra, D.

AU - Khoe, G.D.

AU - Dorren, H.J.S.

PY - 2006

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AB - We investigate ultrafast gain-dynamics in a quantum-dot (QD) semiconductor optical amplifier where two-photon absorption (TPA) occurs in the bulk region of the waveguide during propagation of a sub-picosecond optical pulse, and gain bleaching occurs in the QD active region. Our calculation reveals that TPA provides optical pumping which is quasi-synchronous in time and space with QD carrier depletion, leading to enhancement of carrier capture into the QDs on an ultrafast timescale. The TPA-induced optical pumping, which is qualitatively different from electrical pumping, changes qualitatively carrier recovery dynamics, reducing pattern effects when a train of optical pulses is injected at the ultra-high speed.

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