Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide
| Autor: | JH Joachim Wolter, J Molina Vazquez, Heongkyu Ju, van Pj René Veldhoven, Qian Gong, Hjs Harm Dorren, Z Zhonggui Li, R Richard Nötzel, de T Tjibbe Vries, Daan Lenstra, GD Giok-Djan Khoe |
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| Přispěvatelé: | Electro-Optical Communication, Photonics and Semiconductor Nanophysics, Photonic Integration, Theoretical Physics, BioAnalytical Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Materials science
business.industry Physics::Optics Two-photon absorption Waveguide (optics) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Semiconductor laser theory Condensed Matter::Materials Science Optics Quantum dot laser Quantum dot Relaxation (physics) SDG 7 - Affordable and Clean Energy Electrical and Electronic Engineering Physical and Theoretical Chemistry business Absorption (electromagnetic radiation) Wetting layer |
| Zdroj: | Optics Communications, 259(2), 861-867. Elsevier Ju, H K, Vazquez, J M, Li, Z, Notzel, R, de Vries, T C, Lenstra, D, Gong, Q, van Veldhoven, P J, Wolter, J H, Khoe, G D & Dorren, H J S 2006, ' Polarization-dependent carrier dynamics in a passive InAs/InP quantum dot waveguide ', Optics Communications, vol. 259, no. 2, pp. 861-867 . https://doi.org/10.1016/j.optcom.2005.09.058 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2005.09.058 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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