Digital signal processsing functions for ultra-low frequency calibrations

Autor: Henrik Ingerslev, Jacob Holm Winther, Søren Andresen

Publikováno v: ACTA IMEKO. 9:374

The demand from industry to produce accurate acceleration measurements down to ever lower frequencies and with ever lower noise is increasing. Different vibration transducers are used today for many different purposes within this area, like detection

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db6c954d00126b08253a6730aecd85be
https://doi.org/10.21014/acta_imeko.v9i5.1004

Spin-polarized electron tunneling across a Si delta-doped GaMnAs/n-GaAs interface

Autor: F. B. Rasmussen, C. M. Guertler, B. S. Sørensen, Jac Bland, Poul Erik Lindelof, Janusz Sadowski, Søren Andresen

Publikováno v: Journal of Applied Physics. 94:3990-3994

We study the spin-polarized tunneling of electrons from the valence band of GaMnAs into the conduction band of n-type GaAs with Si delta-doping at the interface. The injection of spin-polarized electrons is detected as circular polarized emission fro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::941be37ad4dede172cd174b1f818ecb9
https://doi.org/10.1063/1.1602945

Test and calibration of Bragg grating based vibration sensors

Autor: Finn Kryger Nielsen, Søren Andresen, Torben Rask Licht

Publikováno v: SPIE Proceedings.

Characterisation of fibre optic vibration sensors represents a challenge since they are not compatible with conventional data acquisition platforms. The situation is complicated by the difficulty of applying a well described input signal, e.g. in for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d3d53e6c9b70ffc0e8d9221ce97e68e
https://doi.org/10.1117/12.974822

Improved thermal and strain performance of annealed polymer optical fiber Bragg gratings

Autor: Wu Yuan, B. Rose, Nicolai Herholdt-Rasmussen, Morten Bache, Finn Kryger Nielsen, Knud Styhr Hansen, Ole Brøsted Sørensen, Søren Andresen, Ole Bang, Alessio Stefani, Torben Jacobsen

Publikováno v: Yuan, S W, Stefani, A, Bache, M, Jacobsen, T, Rose, B, Herholdt-Rasmussen, N, Nielsen, F K, Andersen, S, Sørensen, O B, Hansen, K S & Bang, O 2011, ' Improved thermal and strain performance of annealed polymer optical fiber Bragg gratings ', Optics Communications, vol. 284, no. 1, pp. 176-182 . https://doi.org/10.1016/j.optcom.2010.08.069

We report on a detailed study of the inscription and characterization of fiber Bragg gratings (FBGs) in commercial step index polymer optical fibers (POFs). Through the growth dynamics of the gratings, we identify the effect of UV-induced heating dur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::781736b518246c79e9037ea9842fdbfe
https://orbit.dtu.dk/en/publications/08b8c823-7933-4f3b-8b95-96d94a877de4

Measuring the Charge and Spin States of Electrons on Individual Dopant Atoms in Silicon

Autor: Andrew Ferguson, David N. Jamieson, Marc A. Ahrens, V. Chan, Lloyd C. L. Hollenberg, Alex R. Hamilton, R. G. Clark, Fay E. Hudson, Dane R. McCamey, Martin S. Brandt, Andrew S. Dzurak, R. Brenner, Cameron J. Wellard, David J. Reilly, E. Gauja, C. Yang, T. M. Buehler, Søren Andresen, M. Mitic, Hans Huebl, Wayne D. Hutchison, T. Hopf, Jeffrey C. McCallum

Publikováno v: Topics in Applied Physics ISBN: 9783540793649

We review an ongoing effort to demonstrate technologies required for quantum computing with phosphorus donors in silicon. The main aspect of our research is to achieve control over charge and spin states of individual dopant atoms. This work has requ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b2aea0731b78c497449ed55370ce2ae
https://doi.org/10.1007/978-3-540-79365-6_9