TY - JOUR A1 - Döhring, Thorsten A1 - Schönhense, Gerd A1 - Heinzmann, Ulrich T1 - A circular polariser for the region of windowless VUV radiation JF - Measurement Science and Technology KW - Vakuumultraviolett KW - Strahlung Y1 - 1992 VL - 3 IS - 1 SP - 91 EP - 97 ER - TY - JOUR A1 - Oschinowo, John A1 - Forchel, Alfred A1 - Grützmacher, Detlev A1 - Stollenwerk, Manfred A1 - Heuken, Michael A1 - Heime, Klaus T1 - Photoluminescence study of interdiffusion in In0,53Ga0,47/As/InP surface quantum wells JF - Applied Physics Letters N2 - We have investigated the thermal stability and interdiffusion of In0.53Ga0.47As/InP surface quantum wells. In these structures the optically active InGaAs layer is bounded on one side by vacuum and on the other side by InP. We obtain well‐defined photoluminescence emission spectra with high intensity. After rapid thermal annealing at temperatures between 500 and 900 °C (annealing time 1 min) we observe strong emission energy shifts of up to 316 meV. By using a simple model of ion intermixing we estimate large interdiffusion coefficients (e.g., 1.7×10−14 cm2 s−1 for T=900 °C) and an activation energy of 1.3 eV for the surface quantum wells. KW - Photolumineszenz Y1 - 1992 VL - 60 IS - 21 SP - 2660 EP - 2662 ER - TY - JOUR A1 - Shi, Chang-Xin A1 - Grützmacher, Detlev A1 - Stollenwerk, Manfred A1 - Wang, Qing-Kang A1 - Heime, Klaus T1 - High-performance undoped InP/n-InP/GaAs MSM photodetectors grown by LP-MOVPE JF - IEEE Transactions on Electron Devices KW - Indiumarsenid KW - Galliumarsenid Y1 - 1992 VL - 39 IS - 5 SP - 1028 EP - 1031 PB - IEEE ER - TY - JOUR A1 - Meyer, R. A1 - Hardtdegen, Hilde A1 - Grützmacher, Detlev A1 - Carius, R. A1 - Stollenwerk, Manfred A1 - Balk, Peter T1 - Optical and structural properties of MOVPE grown GaxIn1-xAs/InP strained multiple quantum well structures JF - Journal of Electronic Materials N2 - This paper presents a study of the structural and optical properties of strained GaInAs/ InP multiple quantum well (MQW) structures fabricated by LP-MOVPE. The composition of the Ga x In1−x As films ranged fromx = 0.17 tox = 1.0 and was determined by sputtered neutral mass spectrometry (SNMS) on thick layers. The structures of the MQW samples with well widths from 1.5 to 5 nm were investigated by high resolution x-ray diffraction (HR-XRD). Simulations of the diffraction patterns showed that transition layers of approximately 2 monolayer (ML) thickness with high lattice mismatch exist at the interfaces. Photoluminescence (PL) measurements indicate well widths of a multiple of a monolayer with local variations of one monolayer. The PL peak energies vary smoothly with the Ga concentration. These results were confirmed by optical absorption measurements. KW - Galliumarsenid KW - Indiumarsenid KW - Indiumphosphid Y1 - 1992 VL - 21 IS - 3 SP - 293 EP - 298 ER - TY - JOUR A1 - Oschinowo, John A1 - Forchel, Alfred A1 - Dreybrodt, Jörg A1 - Emmerling, Monika A1 - Gyuro, Imre A1 - Speier, Peter A1 - Grützmacher, Detlev A1 - Stollenwerk, Manfred T1 - Lateral thermal stability modulation for the definition of InGaAs/InP wires JF - Microelectronic Engineering N2 - We have investigated a novel technique for the definition of semiconductor wires. By the selective local removal of the InP top barrier layer wire patterns in which the top material varies between InP and InGaAs are formed from an InGaAs/InP quantum well. In a subsequent annealing step the top InGaAs layer shows substantially stronger interdiffusion than the InP covered regions (wires). By using luminescence spectroscopy we show that this defectfree enhanced interdiffusion can be used to obtain a lateral energy barrier. KW - Indiumarsenid KW - Galliumarsenid Y1 - 1992 VL - 17 IS - 1–4 SP - 505 EP - 508 ER - TY - JOUR A1 - Michaeli, Walter A1 - Telgenbüscher, Klaus A1 - Leiber, Jörn A1 - Stollenwerk, Manfred T1 - Plasmapolymerisation zur Veredelung von Kunststoffoberflächen JF - Dünne Schichten KW - Plasmapolymerisation KW - Kunststoffprodukt KW - Oberflächenbehandlung Y1 - 1992 VL - 1992 IS - 3 SP - 34 EP - 38 ER - TY - JOUR A1 - Michaeli, Walter A1 - Leiber, Jörn A1 - Telgenbüscher, Klaus A1 - Stollenwerk, Manfred T1 - Plasmapolymerisation: Kunststoffe beschichten JF - Industrieanzeiger KW - Plasmapolymerisation Y1 - 1992 VL - 1992 IS - 43 SP - 58 EP - 60 ER - TY - CHAP A1 - Stollenwerk, Manfred A1 - Michaeli, Walter A1 - Telgenbüscher, Klaus A1 - Leiber, Jörn A1 - Londschein, Martin T1 - Verbesserung von Verbundwerkstoffen durch Plasmabehandlung der Verstärkungsfasern KW - Faserverstärkter Kunststoff Y1 - 1992 N1 - 31. Internationale Chemiefasertagung Dornbirn, Österreich, September 1992 ER - TY - BOOK A1 - Dluhosch, Barbara A1 - Freytag, Andreas A1 - Krüger, Malte T1 - Leistungsbilanzsalden und internationale Wettbewerbsfähigkeit KW - Internationale Wettbewerbsfähigkeit KW - Leistungsbilanz KW - Leistungsbilanzdefizit Y1 - 1992 PB - Institut für Wirtschaftspolitik an der Universität Köln CY - Köln ER - TY - JOUR A1 - Krüger, Malte T1 - Was dem EWS geschehen ist JF - Wirtschaftsdienst KW - Europäisches Währungssystem Y1 - 1992 VL - 72 IS - 10 SP - 516 EP - 519 ER -