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189 Diskussionen

von Georg Richter

Lars Tel.-Nr in Berlin (PDI) lautet ab sofort wieder: 030 20377351 Georg -- Georg Richter 2. Physikalisches Institut RWTH Aachen Templergraben 55 52056 Aachen Germany Tel.: +49-241-802-7115 Fax.: +49-241-8022-306

19 Jahre, 4 Monate

neue Telefon-Nr von Lars

von Georg Richter

im PDT: aktuell 030-20377-282 Georg -- Georg Richter 2. Physikalisches Institut RWTH Aachen Templergraben 55 52056 Aachen Germany Tel.: +49-241-802-7115 Fax.: +49-241-8022-306

19 Jahre, 5 Monate

Tel.-Nr. Lars in Berlin

von Georg Richter

030-20377-351 -- Georg Richter 2. Physikalisches Institut RWTH Aachen Templergraben 55 52056 Aachen Germany Tel.: +49-241-802-7115 Fax.: +49-241-8022-306

19 Jahre, 6 Monate

[Fwd: Re: Spin LED's]

von Bernd Beschoten

Infos von Paul. Bernd -------- Ursprüngliche Nachricht -------- Betreff: Re: Spin LED's Datum: Wed, 11 Aug 2004 12:06:31 -0500 Von: Paul Crowell <crowell(a)physics.umn.edu> An: Bernd Beschoten <bernd.beschoten(a)physik.rwth-aachen.de> Referenzen: <5.2.1.1.2.20040810181405.0303c960(a)mail.physics.umn.edu> Hi Bernd, The samples you get will be from the attached subset. -Paul Paul Crowell Associate Professor of Physics University of Minnesota School of Physics and Astronomy 116 Church St. SE Minneapolis, MN 55455 Phone: 612-624-4828 Fax: 612-624-4578 crowell(a)physics.umn.edu http://www.physics.umn.edu/groups/fastspin/

19 Jahre, 8 Monate

[Fwd: Spin LED's]

von Bernd Beschoten

Nachricht von Paul Crowell (s.u.) . Wir werden Proben für die gepulste Injektion bekommen. Bernd -------- Ursprüngliche Nachricht -------- Betreff: Spin LED's Datum: Tue, 10 Aug 2004 23:55:43 -0500 Von: Paul Crowell <crowell(a)physics.umn.edu> An: bernd.beschoten(a)physik.rwth-aachen.de CC: palms001(a)umn.edu Hi Bernd, I talked to Chris, and so we are both on board. We will provide you with some spin-LED's for your initial measurements. As I indicated on the phone, I do not think that these are particularly suitable for ultrafast measurements, but you should be able to test everything out. If things look promising, we can talk about designing an optimal structure. As far as I am concerned, you should feel free to attempt any electrical pump - optical probe or optical pump- electrical probe measurement with these devices. As you are probably aware, I am avoiding virtually all optical pump/ optical probe measurements out of a tacit agreement with David. (The exception is one measurement that Scott Crooker is doing). We have plenty of unbonded devices, and these are what I will send. They are 300 micron diameter mesas, with a 150 micron gold pad deposited through a shadow mask. The position and shape of the gold pad can be somewhat irregular, but they have worked quite well. They will be annealed here at 250 C. You can raise the temperature to 150 - 170 C to In bond them to a sample holder. The top contact will have to be wire-bonded. We will prepare a packet with some characteristic J-V curves. Generally speaking, if the J-V looks normal and it emits light, then it will work. They are rather robust provided that the leads are not reversed. You can use 100 mA with the Schottky reverse-biased and the p-n forward biased. A quick check in perp. field is advisable. Also, be aware that the optimal conditions at low temperature are strongly bias-dependent. We will try to organize things on Thursday to send to you. Since we have lots of unbonded devices. We will send you a few devices each from both QW and bulk detectors. -Paul Paul Crowell Associate Professor of Physics University of Minnesota School of Physics and Astronomy 116 Church St. SE Minneapolis, MN 55455 Phone: 612-624-4828 Fax: 612-624-4578 crowell(a)physics.umn.edu http://www.physics.umn.edu/groups/fastspin/

19 Jahre, 8 Monate

paper

von Bernd Beschoten

hier die Paper. -b.

19 Jahre, 8 Monate

Gruppenbesprechnung AG-Puls heute voraussichtlich 11:00Uhr

von Marcus Heidkamp

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 s.o. M. ============================================================== | Dipl. Phys. Marcus Heidkamp | Office: 28 A 305 | | II. Physikalisches Institut A | Phone: +49 (241) 80-27058 | | RWTH Aachen | FAX: +49 (241) 80-22306 | +-------------------------------+----------------------------+ | Sommerfeldstrasse 28 | | | 52074 Aachen, GERMANY | www.physik.rwth-aachen.de | ============================================================== -----BEGIN PGP SIGNATURE----- Version: PGPfreeware 6.0.2i iQA/AwUBQQ3gUrkxPzPBkABjEQLZhgCcDsfXn+SF29HyBO22ryEEAZC09BYAn2PJ qtJHMyZgpSA8CckPIIFUjQSD =GznB -----END PGP SIGNATURE-----

19 Jahre, 8 Monate

Aufschlußreicher Link...

von Klaus Schmalbuch

zum Thema Aufbau und Zusammensetzung bekannter und weniger geläufiger chemischer bzw. kristallographischer Strukturen, z.B. Granat. http://132.230.13.25/Vorlesung/Strukturtypen/alle.html YIG hat übrigens doch nichts mit Silizium zu tun, obwohl Granat im allgemeinen so etwas wie (A^2+_3) (B^3+_2) (Si_3) (O_12) ist.

19 Jahre, 9 Monate

Gruppenbesprechung AG-Puls

von Georg Richter

Heute um 10:00 Georg -- Georg Richter 2. Physikalisches Institut RWTH Aachen Templergraben 55 52056 Aachen Germany Tel.: +49-241-802-7115 Fax.: +49-241-8022-306

19 Jahre, 10 Monate

[Fwd: Workshop on "Solid State Based Quantum Information Processing"]

von Bernd Beschoten

Zur Info Bernd -------- Ursprüngliche Nachricht -------- Betreff: Workshop on "Solid State Based Quantum Information Processing" Datum: Mon, 24 May 2004 15:10:52 +0200 Von: "Gross, Rudolf " <Rudolf.Gross(a)wmi.badw-muenchen.de> An: "Aarts, Jan" <aarts(a)phys.leidenuniv.nl>, "Adrian, Hermann" <hermann.adrian(a)uni-mainz.de>, "Ahn, Charles" <charles.ahn(a)yale.edu>, "Aprili, Marco " <aprili(a)csnsm.in2p3.fr>, "Batlogg, Bertram" <batlogg(a)solid.phys.ethz.ch>, "Bayreuther, Günther" <Guenther.Bayreuther(a)physik.uni-regensburg.de>, "Berndt, Richard" <berndt(a)physik.uni-kiel.de>, "Beschoten, Bernd " <Bernd.Beschoten(a)physik.rwth-aachen.de>, "Blamire, Mark " <mb52(a)cam.ac.uk>, "Blank, D.H.A." <d.h.a.blank(a)utwente.nl>, "Blatter, G." <blatterj(a)itp.phys.ethz.ch>, "Boyen, Hans-Gerd" <hans-gerd.boyen(a)physik.uni-ulm.de>, "Briegel, Hans " <briegel(a)theorie.physik.uni-muenchen.de>, "Bruder, Christoph" <christoph.bruder(a)unibas.ch>, "Büchner, Bernd" <b.buechner(a)ifw-dresden.de>, "Char, Kookrin" <kchar(a)phya.snu.ac.kr>, "Chesca, Boris" <boris.chesca(a)uni-tuebingen.de>, "Claeson, Tord" <F4ATC(a)fy.chalmers.se>, "Clarke, John" <jclarke(a)physics.berkeley.edu>, "Devoret, M." <devoret(a)drecam.saclay.cea.fr>, "Dressel, Martin" <dressel(a)pi1.physik.uni-stuttgart.de>, "Eckern, Ulrich" <ulrich.eckern(a)physik.uni-augsburg.de>, "Ensslin, Klaus" <ensslin(a)solid.phys.ethz.ch>, "Fassbender, Jürgen " <J.Fassbender(a)fz-rossendorf.de>, "Fert, Albert" <albert.fert(a)thalesgroup.com>, "Fischer, Oystein " <Oystein.Fischer(a)physics.unige.ch>, "Fontcuberta, Josep" <fontcuberta(a)icmab.es>, "Freimuth, Axel " <freimuth(a)ph2.Uni-Koeln.DE>, "Grundler, Dirk " <grundler(a)physnet.uni-hamburg.de>, "Güntherodt, Gernot" <Gernot.Guentherodt(a)physik.rwth-aachen.de>, "Harmans, Kees" <harmans(a)qt2.tn.tudelft.nl>, "Hillebrands, Burkhard" <hilleb(a)physik.uni-kl.de>, "Hoenig, H.E." <hoenig(a)ipht-jena.de> Dear colleague, the Cooperative Research Center (SFB) 631 of the German Science Foundation, which is a joint research effort on solid state based quantum information processing of several research institutions in the greater Munich area (see http://www.wmi.badw-muenchen.de/SFB631/) is organizing an international workshop on Solid State Based Quantum Information Processing at Herrsching close to Munich from September 13 to 17, 2004. The aim of the workshop is to promote an international discussion of the progress in solid state based quantum information processing including hardware concepts, theoretical foundations of solid state based qubits as well as quantum information theory. The format will be a two-day summer school (Tues. to Wed.) with 8 to 10 two-hour tutorials given by internationally leading scientists and a two-day workshop (Thurs. to Fri.) with invited and contributed talks as well as poster sessions. The afternoon schedule of the workshop will be relaxed to provide time for informal discussions. For more information about the workshop, tentative list of invited speakers, deadlines etc., please check the attached flyer/poster and the workshop webpage http://www.wmi.badw-muenchen.de/SFB631/QIP2004/ Please feel free to forward this message and the attached flyer/poster to interested colleagues. With best regards, The members of SFB 631 ------------------------------------------------------------------------------- Prof. Dr. Rudolf Gross Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften und Lehrstuhl E23, Technische Universitaet Muenchen Walther-Meissner Str. 8, D-85748 Garching, Germany Tel.: +49 -- (0)89 289 14201 Fax.: +49 -- (0)89 289 14206 E-mail: Rudolf.Gross(a)wmi.badw.de http://www.wmi.badw.de -------------------------------------------------------------------------------

19 Jahre, 11 Monate

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