Zobrazeno 1 - 10
of 53
pro vyhledávání: '"W. Maineult"'
Autor:
F. Ramirez-Martinez, Jean-Noël Fuchs, W. Maineult, Ch. Deutsch, T. Schneider, P. Rosenbusch, Friedemann Reinhard, Franck Laloë, Clément Lacroûte, Jakob Reichel, F. Piéchon
Publikováno v:
Revue française de métrologie. :3-11
We perform Ramsey spectroscopy on the ground state of ultracold 87Rb atoms magnetically trapped on a chip in the Knudsen regime. Field inhomogeneities over the sample should reduce the contrast of the Ramsey frindges by a factor of 5 for 5 s of inter
Autor:
Stefano Barbieri, W. Maineult, Alexander Giles Davies, Harvey E. Beere, Raffaele Colombelli, Suraj P. Khanna, Yannick Chassagneux, David A. Ritchie, Edmund H. Linfield
Publikováno v:
Nature. 457:174-178
Semiconductor lasers based on two-dimensional photonic crystals generally rely on an optically pumped central area, surrounded by un-pumped, and therefore absorbing, regions. This ideal configuration is lost when photonic-crystal lasers are electrica
Publikováno v:
Physical Review A
Physical Review A, American Physical Society, 2015, 92 (1), pp.012106. ⟨10.1103/PhysRevA.92.012106⟩
Physical Review A : Atomic, molecular, and optical physics [1990-2015]
Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2015, 92 (1), pp.012106. ⟨10.1103/PhysRevA.92.012106⟩
Physical Review A, American Physical Society, 2015, 92 (1), pp.012106. ⟨10.1103/PhysRevA.92.012106⟩
Physical Review A : Atomic, molecular, and optical physics [1990-2015]
Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2015, 92 (1), pp.012106. ⟨10.1103/PhysRevA.92.012106⟩
We present a compact atomic clock interrogating ultracold 87Rb magnetically trapped on an atom chip. Very long coherence times sustained by spin self-rephasing allow us to interrogate the atomic transition with 85% contrast at 5 s Ramsey time. The cl
Autor:
P. Gellie, Giorgio Santarelli, Lu Ding, H. E. Beere, Carlo Sirtori, Raffaele Colombelli, Stefano Barbieri, W. Maineult, David A. Ritchie
Publikováno v:
2010 IEEE International Frequency Control Symposium.
We have used the Pockels effect in ZnTe to demonstrate that the frequency and the phase of a 2.7Terahertz Quantum Cascade Laser can be actively stabilized to the n-th harmonic of the 90MHz repetition rate of a commercial, mode-locked Er-doped fiber-l
Autor:
P. Filloux, Tahsin Akalin, S. Barbieri, David A. Ritchie, Isabelle Sagnes, Rémy Braive, Stéphane Guilet, L. Ding, W. Maineult, Carlo Sirtori, Harvey E. Beere, P. Gellie, J.F. Lampin
Publikováno v:
SPIE Proceedings.
At Terahertz (THz) frequencies metals are still excellent materials to guide and confine electromagnetic radiation with relatively low losses. Therefore the concepts developed in the microwave range to design efficient waveguides and resonators can b
Autor:
Harvey E. Beere, Carlo Sirtori, Raffaele Colombelli, Giorgio Santarelli, David A. Ritchie, P. Gellie, W. Maineult, Stefano Barbieri, Lu Ding
Publikováno v:
Nature Photonics
Nature Photonics, 2010, 4, pp.636-640. ⟨10.1038/nphoton.2010.125⟩
Nature Photonics, 2010, 4, pp.636-640. ⟨10.1038/nphoton.2010.125⟩
International audience; Mode-locked femtosecond lasers have revolutionized the field of optical metrology by allowing the realization of ultra-stable phase-coherent links between the optical-frequency domain and the radiofrequency range. In this work
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe47a98ffd6df87187462944a7adb9a4
https://hal.science/hal-03733011
https://hal.science/hal-03733011
Autor:
Isabelle Sagnes, H. E. Beere, Carlo Sirtori, J.-F. Lampin, David A. Ritchie, W. Maineult, P. Gellie, P. Filloux, Lu Ding, Stefano Barbieri, Tahsin Akalin
Publikováno v:
Applied Physics Letters
Applied Physics Letters, American Institute of Physics, 2010, 96, pp.021108-1-3. ⟨10.1063/1.3284518⟩
Applied Physics Letters, 2010, 96, pp.021108-1-3. ⟨10.1063/1.3284518⟩
Applied Physics Letters, American Institute of Physics, 2010, 96, pp.021108-1-3. ⟨10.1063/1.3284518⟩
Applied Physics Letters, 2010, 96, pp.021108-1-3. ⟨10.1063/1.3284518⟩
International audience; We report on microwave impedance measurements of metal-metal ridge-waveguide terahertz quantum cascade lasers. Experimental data, recorded at 4 K in the 100 MHz–55 GHz range, are well reproduced by distributed-parameter tran
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3102f96029f7c7e8b88fa2d1b15eeeab
https://hal.archives-ouvertes.fr/hal-00548728
https://hal.archives-ouvertes.fr/hal-00548728
Autor:
Pascal Filloux, Tahsin Akalin, Alessio Andronico, David A. Ritchie, Emilien Peytavit, Stefano Barbieri, Harvey E. Beere, Jean-Francois Lampin, P. Gellie, Carlo Sirtori, W. Maineult, Giuseppe Leo
Publikováno v:
Proceedings of the 2009 Asia Pacific Microwave Conference, APMC 2009
Asia Pacific Microwave Conference, APMC 2009
Asia Pacific Microwave Conference, APMC 2009, 2009, Singapore. pp.183-185, ⟨10.1109/APMC.2009.5385404⟩
Asia Pacific Microwave Conference, APMC 2009, Dec 2009, Singapour, Singapore. pp.183-185, ⟨10.1109/APMC.2009.5385404⟩
Asia Pacific Microwave Conference, APMC 2009
Asia Pacific Microwave Conference, APMC 2009, 2009, Singapore. pp.183-185, ⟨10.1109/APMC.2009.5385404⟩
Asia Pacific Microwave Conference, APMC 2009, Dec 2009, Singapour, Singapore. pp.183-185, ⟨10.1109/APMC.2009.5385404⟩
International audience; Quantum Cascade Lasers (QCL) are probably the most promising sources for Terahertz wave generation. The key issue especially for double metal QCLs is the extraction and the beam shaping of the emitted power. We propose a solut
Autor:
Carlo Sirtori, P. Gellie, T. Durand, Jerome Meilhan, W. Maineult, Harvey E. Beere, François Simoens, David A. Ritchie, Stefano Barbieri
Publikováno v:
SPIE Proceedings.
Portability, low cost and fast acquisition rates are key features that a THz imaging system should satisfy for extended commercialized applications. With regards to these features, the source - detector association of a THz Quantum Cascade Laser (QCL
Autor:
Suraj P. Khanna, W. Maineult, David A. Ritchie, Raffaele Colombelli, Yannick Chassagneux, Edmund H. Linfield, Harvey E. Beere, Stefano Barbieri, Alexander Giles Davies
Publikováno v:
Scopus-Elsevier
We demonstrate single-mode, surface-emitting terahertz lasers at λ≈110 µm employing photonic-crystal resonators. The devices employ metal-metal waveguides, and the photonic-crystal lattice is implemented by the sole patterning of the top metal co