Search Results - "Ossau, W."

Injection and detection of a spin-polarized current in a light-emitting diode by Molenkamp, L. W, Fiederling, R, Keim, M, Reuscher, G, Ossau, W, Schmidt, G, Waag, A

“…The field of magnetoelectronics has been growing in practical importance in recent years. For example, devices that harness electronic spin-such as…”
Get full text

Spatially Resolved Thermodynamics of the Partially Ionized Exciton Gas in GaAs by Bieker, S, Henn, T, Kiessling, T, Ossau, W, Molenkamp, L W

“…We report on the observation of macroscopic free exciton photoluminescence (PL) rings that appear in spatially resolved PL images obtained on a high purity…”
Get full text

Correct determination of low-temperature free-exciton diffusion profiles in GaAs by Bieker, S., Kiessling, T., Ossau, W., Molenkamp, L. W.

Get full text

Optical power-driven electron spin relaxation regime crossover in Mn-doped bulk GaAs by Münzhuber, F., Kiessling, T., Ossau, W., Molenkamp, L. W., Astakhov, G. V.

Get full text

Dimensional crossover of free exciton diffusion in etched GaAs wire structures by Bieker, S., Stühler, R., Kiessling, T., Ossau, W., Molenkamp, L. W.

“…We report on low-temperature spatially resolved photoluminescence spectroscopy to study the diffusion of free excitons in etched wire structures of high-purity…”
Get full text

Picosecond real-space imaging of electron spin diffusion in GaAs by Henn, T., Kiessling, T., Ossau, W., Molenkamp, L. W., Reuter, D., Wieck, A. D.

“…We use time-resolved two-color Kerr microscopy to study low-temperature electron spin diffusion in bulk GaAs with high spatial and temporal resolution. This…”
Get full text

Hot carrier effects on the magneto-optical detection of electron spins in GaAs by Henn, T., Heckel, A., Beck, M., Kiessling, T., Ossau, W., Molenkamp, L. W., Reuter, D., Wieck, A. D.

“…We report on spatially resolved pump-probe MOKE spectroscopy measurements of electron spins in bulk n-type GaAs. For low lattice temperatures these…”
Get full text

Hot carrier effects on lateral electron spin diffusion in n -type GaAs by Quast, J.-H., Henn, T., Kiessling, T., Ossau, W., Molenkamp, L. W., Reuter, D., Wieck, A. D.

“…We report on spatially resolved two-color pump-probe Hanle-magneto-optical Kerr effect studies of low-temperature electron spin diffusion in bulk n-type GaAs…”
Get full text

Photoinduced Barkhausen effect in the ferromagnetic semiconductor (Ga,Mn)As by Astakhov, G V, Schwittek, J, Schott, G M, Gould, C, Ossau, W, Brunner, K, Molenkamp, L W

“…Magnetization of ferromagnetic materials commonly occurs via random jumps of domain walls between pinning sites, a phenomenon known as the Barkhausen effect…”
Get full text

Circular-to-linear and linear-to-circular conversion of optical polarization by semiconductor quantum dots by Astakhov, G V, Kiessling, T, Platonov, A V, Slobodskyy, T, Mahapatra, S, Ossau, W, Schmidt, G, Brunner, K, Molenkamp, L W

“…We report circular-to-linear and linear-to-circular conversion of optical polarization by semiconductor quantum dots. The polarization conversion occurs under…”
Get full text

Suppression of electron spin relaxation in Mn-doped GaAs by Astakhov, G V, Dzhioev, R I, Kavokin, K V, Korenev, V L, Lazarev, M V, Tkachuk, M N, Kusrayev, Yu G, Kiessling, T, Ossau, W, Molenkamp, L W

“…We report a surprisingly long spin relaxation time of electrons in Mn-doped p-GaAs. The spin relaxation time scales with the optical pumping and increases from…”
Get full text

Nonthermal photocoercivity effect in a low-doped (Ga,Mn)As ferromagnetic semiconductor by Astakhov, G V, Hoffmann, H, Korenev, V L, Kiessling, T, Schwittek, J, Schott, G M, Gould, C, Ossau, W, Brunner, K, Molenkamp, L W

“…We report a photoinduced change of the coercive field, i.e., a photocoercivity effect (PCE), under very low intensity illumination of a low-doped (Ga,Mn)As…”
Get full text

Picosecond dynamics of the photoinduced spin polarization in epitaxial (Ga,Mn)as films by Kimel, A V, Astakhov, G V, Schott, G M, Kirilyuk, A, Yakovlev, D R, Karczewski, G, Ossau, W, Schmidt, G, Molenkamp, L W, Rasing, Th

“…Static and time-resolved magneto-optical spectra of the ferromagnetic semiconductor (Ga,Mn)As show that a pulsed photoexcitation with a fluence of 10…”
Get full text

Electron spin manipulation using semimagnetic resonant tunneling diodes by Gruber, Th, Keim, M., Fiederling, R., Reuscher, G., Ossau, W., Schmidt, G., Molenkamp, L. W., Waag, A.

“…One major challenge for the development of spintronic devices is the control of the spin polarization of an electron current. We propose and demonstrate the…”
Get full text

Detection of electrical spin injection by light-emitting diodes in top- and side-emission configurations by Fiederling, R., Grabs, P., Ossau, W., Schmidt, G., Molenkamp, L. W.

“…Detection of the degree of circular polarization of the electroluminescence of a light-emitting diode (LED) fitted with a spin injecting contact (a spin-LED)…”
Get full text

Observation of giant magnetic linear dichroism in (Ga, Mn) As by Kimel, A V, Astakhov, G V, Kirilyuk, A, Schott, G M, Karczewski, G, Ossau, W, Schmidt, G, Molenkamp, L W, Rasing, Th

“…Giant magnetic linear dichroism (MLD) is observed in the ferromagnetic semiconductor Ga(0.98)Mn(0.02)As. The contribution to this effect induced by the…”
Get full text

Definitive observation of the dark triplet ground state of charged excitons in high magnetic fields by Astakhov, G. V., Yakovlev, D. R., Rudenkov, V. V., Christianen, P. C. M., Barrick, T., Crooker, S. A., Dzyubenko, A. B., Ossau, W., Maan, J. C., Karczewski, G., Wojtowicz, T.

Get full text

Spin-lattice relaxation of Mn ions in ZnMnSe ∕ ZnBeSe quantum wells measured under pulsed photoexcitation by Kneip, M. K., Yakovlev, D. R., Bayer, M., Maksimov, A. A., Tartakovskii, I. I., Keller, D., Ossau, W., Molenkamp, L. W., Waag, A.

Get full text

Hot electron spin diffusion in n-type GaAs by Henn, T., Quast, J.-H., Beck, M., Kiessling, T., Ossau, W., Molenkamp, L. W.

“…We use two-color magneto-optical Kerr (MOKE) microscopy to study low-temperature electron spin diffusion in bulk n -type GaAs ( n = 1.4 × 10 16 cm −3 ). We…”
Get full text

Optical spectroscopy on individual CdSe/ZnMnSe quantum dots by Bacher, G., Schömig, H., Welsch, M. K., Zaitsev, S., Kulakovskii, V. D., Forchel, A., Lee, S., Dobrowolska, M., Furdyna, J. K., König, B., Ossau, W.

“…Optical single dot studies in wide-band gap diluted magnetic CdSe/ZnMnSe quantum dots have been performed. Due to the sample design, the photoluminescence…”
Get full text