Metrology in electricity and magnetism: EURAMET activities today and tomorrow

Autor: J. Melcher, Markus Zeier, Luca Callegaro, Beat Jeckelmann, Jari Hällström, Paul S. Wright, Tjbm Janssen, U. Siegner, François Piquemal, Gert Rietveld

Publikováno v: Piquemal, F, Jeckelmann, B, Callegaro, L, Hällström, J, Janssen, T J B M, Melcher, J, Rietveld, G, Siegner, U, Wright, P & Zeier, M 2017, ' Metrology in electricity and magnetism : EURAMET activities today and tomorrow ', Metrologia, vol. 54, no. 5, pp. R1-R24 . https://doi.org/10.1088/1681-7575/aa7cae

Metrology dedicated to electricity and magnetism has changed considerably in recent years. It encompasses almost all modern scientific, industrial, and societal challenges, e.g. the revision of the International System of Units, the profound transfor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4769798f6401187e8eee30d45ed7083
https://doi.org/10.1088/1681-7575/aa7cae

Magnetic property investigations on ZnMnO

Autor: N. Izyumskaya, Vitaliy Avrutin, Sibylle Sievers, J. Stoemenos, A. Che Mofor, Hergo-H. Wehmann, M. Albrecht, Wladimir Schoch, Andreas Waag, U. Siegner, Abdelhamid El-Shaer, H. Ahlers, Andrey Bakin

Publikováno v: Superlattices and Microstructures. 39:381-386

There have been controversial reports about the type of magnetic coupling and hence ferromagnetism in ZnMnO. We have investigated the magnetic properties of ZnxMn1−xO layers grown by Molecular Beam Epitaxy (MBE) on sapphire substrates. At first sig

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6db3d950846f5abbcd159dcb3123fa4f
https://doi.org/10.1016/j.spmi.2005.08.063

Low-threshold high-dynamic-range optical limiter for ultra-short laser pulses

Autor: A. Nevejina-Sturhan, Olav Werhahn, U. Siegner

Publikováno v: Applied Physics B. 74:553-557

We demonstrate an optical limiter for ultra-short (∼100-fs) laser pulses. The device has a dynamic range (= damage energy/onset-of-limiting energy) of more than 10000 and an onset-of-limiting energy of only ∼10 nJ. The output-pulse energy is kept

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::00b58ba1886ace98912fc455da0b9040
https://doi.org/10.1007/s003400200862

Femtosecond nonlinear optics of low-temperature grown semiconductors

Autor: U. Siegner, François Morier-Genoud, Petra Specht, Markus Haiml, Eicke R. Weber, R. C. Lutz, Ursula Keller

Publikováno v: Physica B: Condensed Matter. :733-736

We investigate the nonlinear optical properties of low-temperature-grown (LT) GaAs. It is shown that the strength of the absorptive nonlinearity is weak in as-grown undoped LT-GaAs with a fast recovery time of the nonlinear absorption. The reason for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c8092c541652a5f38a938443301a43e1
https://doi.org/10.1016/s0921-4526(99)00625-0

Ultrafast coherent spectroscopy of one-dimensional magnetoexcitons in semiconductors

Autor: U. Siegner, S. Bar-Ad, Daniel S. Chemla

Publikováno v: Chemical Physics. 210:155-170

We investigate the ultrashort coherent dynamics of one-dimensional Fano andvLorentzian magnetoexcitons in GaAs using temporally and spectrally resolved four-wave mixing (FWM). The dephasing time of a Fano resonance is intrinsically limited by the cou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d51b16fec255c410fbd0a7a5a6b483b
https://doi.org/10.1016/0301-0104(96)00076-6