Integrated Terahertz pulse generation and amplification in quantum cascade lasers
| Autor: | Stefano Barbieri, Jérôme Tignon, Julien Madéo, R. Rungsawang, S. Sawallich, Dimitri Oustinov, Sukhdeep Dhillon, Pascal Filloux, Nathan Jukam, Carlo Sirtori, Xavier Marcadet |
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| Přispěvatelé: | Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Thales Research and Technology [Palaiseau], THALES, Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Manijeh Razeghi, Rengarajan Sudharsanan, Gail J. Brown, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), THALES [France] |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Materials science
business.industry Terahertz radiation Far-infrared laser Physics::Optics Laser law.invention Terahertz spectroscopy and technology Photomixing Optics law Cascade [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Optoelectronics business Quantum cascade laser Ultrashort pulse ComputingMilieux_MISCELLANEOUS |
| Zdroj: | GDR-E THz 2010 GDR-E THz 2010, 2010, Paris, France BASE-Bielefeld Academic Search Engine Photonics West 2011 Photonics West 2011, 2011, San Francisco, United States Proc. SPIE 7945 : Quantum Sensing and Nanophotonic Devices VIII Photonics West 2011, 2011, San Francisco, United States. pp.79450B International Conference on Physics of Semiconductor International Conference on Physics of Semiconductor, Jul 2010, Seoul, South Korea |
| Popis: | Integrated terahertz (THz) pulse generation and amplification in a THz quantum cascade laser (QCL) is demonstrated. Intra-cavity THz pulses are generated by exciting the facet of the quantum cascade laser with an ultrafast Ti:Sapphire laser (~100fs) and detected using electro-optic sampling. Maximum THz field emission is found with an interband transition of 1.535eV (809nm) and by narrowing the excitation laser bandwidth to ~3THz. These resonance conditions correspond to the narrowband excitation of the quantum cascade miniband, indicating that the THz pulse is generated by the photo-excited carriers that are accelerated by the applied field. The generated pulse is subsequently amplified by the narrowband gain of the laser as it propagates through the QCL cavity. As an integrated THz generator-amplifier, the technique avoids the issues associated with the coupling of external THz pulses into sub-wavelength dimensioned cavities. |
| Databáze: | OpenAIRE |
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