Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Valérie Lefèvre"'
Autor:
Geneviève Pfister-Guillouzo, Jean-Louis Ripoll, Valérie Lefèvre, Anna Chrostowska, Sylvie Joantéguy
Publikováno v:
Organometallics. 18:4795-4799
The flash vacuum thermolysis of propargylthio- and allylthiodialkylsilanes, potential precursors of unhindered silanethiones (R2SiS), has been investigated by photoelectron spectroscopy. This technique allowed us to characterize in the gas phase two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b49c8b29e2490d89214754bc627bfc32
https://doi.org/10.1021/om9901729
https://doi.org/10.1021/om9901729
Autor:
Valérie Lefèvre-Seguin
Publikováno v:
Optical Materials. 11:153-165
Light can be confined efficiently in the high-Q, small-volume whispering-gallery-modes observed in silica microspheres. The properties of these modes have allowed us to obtain laser action with very low thresholds in Nd-doped silica microspheres. Aft
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67b4de87b815caab08f7da23993b93cc
https://doi.org/10.1016/s0925-3467(98)00041-x
https://doi.org/10.1016/s0925-3467(98)00041-x
Autor:
Jean-Louis Ripoll, Stephane Bailleux, Valérie Lefèvre, Marcel Bogey, Jocelyne Levillain, Wieslaw Wojnowski
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 140:73-77
The flash vacuum thermolysis (700–1000°C) of allylthiodi-tert−butoxysilane (2), propargylthiodi-rert−butoxysilane (3) and 1,1,3,3-tetra-tert−butoxycyclodisilthiane (4) has been investigated. In the case of 3 and 4, the β-elimination of rert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d4704f04933a59e8f62b6b825badcf4
https://doi.org/10.1080/10426509808035733
https://doi.org/10.1080/10426509808035733
Autor:
François Treussart, Vladimir S. Ilchenko, P.S Volikov, Serge Haroche, Jean-Michel Raimond, V.L. Velichansky, Valérie Lefèvre-Seguin
Publikováno v:
Optics Communications. 145:86-90
We demonstrate the tuning of high- Q optical whispering-gallery modes in a fused silica microsphere by applying mechanical strain. The measured total tunability is over 0.3 nm in the near-infrared band, with the undercoupled quality-factor being Q >1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f53913fa4b497d6e40cf7b5dec936b60
https://doi.org/10.1016/s0030-4018(97)00439-2
https://doi.org/10.1016/s0030-4018(97)00439-2
Autor:
Serge Haroche, Valérie Lefèvre-Seguin
Publikováno v:
Materials Science and Engineering: B. 48:53-58
We present experiments performed on highly transparent silica microspheres used as very high Q optical resonators for cavity quantum electrodynamics (CQED) studies. By coupling these microspheres to eroded optical fibers and fiber tips, direct mappin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df67fb85a08bacd1e86ba6a041d19011
https://doi.org/10.1016/s0921-5107(97)00080-9
https://doi.org/10.1016/s0921-5107(97)00080-9
Autor:
Jean-Louis Ripoll, Valérie Lefèvre, V. Metail, A. Chrostowska-Senio, S. Joanteguy, G. Pfister-Guillouzo, Yves Dat
Publikováno v:
Organometallics
Organometallics, American Chemical Society, 1997, 16 (8), pp.1635--1640
HAL
Organometallics, American Chemical Society, 1997, 16 (8), pp.1635--1640
HAL
International audience; The flash vacuum thermolysis of cyclodisilaphosphanes, cyclotrisilaphosphanes, and a phosphasilacyclobutane, potential precursors of unhindered silylidenephosphanes (R2Si=PR′), has been investigated by NMR as well as by coup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cef8b20b785c76b46aabc8494de9272
https://doi.org/10.1021/om960914n
https://doi.org/10.1021/om960914n
Autor:
Serge Haroche, Valérie Lefèvre-Seguin, Jean-Michel Raimond, François Treussart, Vahid Sandoghdar, Jean Hare
Publikováno v:
Physical Review A. 54:R1777-R1780
We report on the realization of a whispering-gallery-mode laser based on neodymium-doped silica microspheres. Absorbed pump powers at threshold are as low as 200 nW. The linear variation of the threshold with the loss factor of the cavity mode has al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::539ca6bd3d98ba71275e0775e0a02d51
https://doi.org/10.1103/physreva.54.r1777
https://doi.org/10.1103/physreva.54.r1777
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 91:281-284
The flash vacuum thermolysis (650-1000°C) of unsaturated di-t-butylsilyl ether, sulfide, and amine 7-9 gave, upon retro-ene reaction, β-elimination of isobutene and dehydrogenation, silicon monoxide (4), silicon monosulfide (5), and hydrogen silais
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d461d2cd05167926db16adae2fffda5
https://doi.org/10.1080/10426509408021954
https://doi.org/10.1080/10426509408021954
Publikováno v:
Europhysics Letters (EPL). 23:327-334
We have studied by phase modulation spectroscopy the whispering-gallery modes (Mie resonances) of 60 to 200 μm diameter microspheres obtained by fusing with a CO2 laser the end of a high-transmission silica fibre. An evanescent wave at 780 nm was pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::356e38e189f65e480ab4acff503fcd3e
https://doi.org/10.1209/0295-5075/23/5/005
https://doi.org/10.1209/0295-5075/23/5/005
Publikováno v:
ChemInform. 27
Dimethylsilanethione was cleanly generated, under flash vacuum thermolysis conditions, by retro-ene cleavage of propargylthiodimethylsilane. The cothermolysis of this latter and ketene dimer led in 60 % yield to an only [2+2] cycloadduct, 2,2-dimethy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5f994b1d579337f025fb140ebc79366
https://doi.org/10.1002/chin.199652194
https://doi.org/10.1002/chin.199652194