The information presented here is very complete, and therefore long.

Resume

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Ralf Schwedler gained a PhD in Sciences from the RWTH Aachen, Germany, in 1995. He currently works as a postdoctoral researcher at the Groupe d'Etudes des Semiconducteurs (GES- CNRS), Université Montpellier II, France. His primary research topics include optical investigations of the carrier dynamics in III-V semiconductors and SiC, and the Wannier-Stark Effect in shallow semiconductor superlattices.

Contents of this page

Degrees

Professional Experience

Diploma Students Supervised

Student Research Projects Advised

Further Information

Degrees

02/05/95 Doctorate in Sciences, thesis: Grundlagen und Charakterisierung von Wannier-Stark Modulatoren ( Basic Properties and Characterization of Wannier-Stark Modulators ) (in German), at the Institute for Semiconductor Electronics (Prof. H. Kurz), Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany.

10/11/91 Diploma in Physics, thesis: Elektrolumineszenz- und Elektroabsorptionsspektroskopie an InP/InGaAs(P) Multi-Quantum-Well Strukturen ( Electro-luminescence and Electro-Absorption Spectroscopy on InP/InGaAs(P) Multi-Quantum Well Structures ) (in German), at the Institute for Semiconductor Electronics (Prof. H. Kurz), Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany.

Professional Experience

since
03/01/1995 Postdoctoral researcher, Groupe d'Etudes des Semiconducteurs, Université Montpellier II, France.
Optical spectroscopy, including picosecond time-resolved luminescence, of III/V semiconductors (GaInP/GaAs, InGaAs/InGaAs, GaN) and SiC. Carrier relaxation in disordered semiconductor material. Image processing, numerical simulations of optical properties and carrier relaxation, and all the related C, C++ and UNIX stuff. And, of course, I'm maintaining this WWW server and, much too often, the HP station on which it runs.

10/12/1991 - 1/31/1995 Research assistant, Institute for Semiconductor Electronics, Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany.

1989 - 1991 Student research assistant, Institute for Semiconductor Electronics, Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany.
Continous wave optical spectroscopy (photoluminescence, photocurrent, transmission, reflection, optical gain) on III/V semiconductor bulk material and heterostructures (InGaAs/InP, AlGaAs/GaAs, GaInP/GaAs, GaP, SiGe).
Numerical simulations of band structure, confined electronic states, Wannier-Stark Effect, and ultrafast carrier dynamics in semiconductor heterostructures, under UNIX System V and Linux, using FORTRAN, C and C++. Analysis of experimental results from X-ray diffractometry, mass spectrometry and electron microscopy, and development of methods to correlate these results with optical properties.
Managed CW-optical laboratory, including CW laser systems, optical cryostats and related vacuum technology, monochromators, detectors and spectrophotometer. Wrote software for data acquisition (GPIB, parallel busses) and visualization (GEM), using C and assembler.
Installed and maintained UNIX System V (Atari Developers Release) machines including Motif, Networking (Mail, FTP, NFS, WWW), and ported lots of standard software (gcc, ghostscript, scientific visualization software) for that platform. Installed and maintained several LINUX boxes.

1987 - 1988 Student research assistant, Fraunhofer Institute for Laser Technology, Aachen, Germany.
Welding and soldering using pulsed and quasi-CW Nd:YAG lasers. Wrote software for laser marking (Turbo Pascal, CPM) and image analysis and processing (ASYST, IBM Pascal, IBM/PC). Helped in installation and maintenance of Nd:YAG laser laboratory.

1987 Student research assistant, Workgroup Technology and Society, Nuclear Research Center, Jülich, Germany.
Evaluated literature for a mainly sociological study on the future role of non-thermal laser applications.

1985 - 1987 Programmer, Data Beutner KG, Kellinghusen, Germany.
Wrote educational programs on Schneider (aka Amstrad) and MSX microcomputers, in BASIC (I admit) and Z80 assembler.

1983 - 1984 Ambulance man, German Red Cross, Itzehoe, Germany, Germany.

Personal Information

Date of birth: 05/02/1963

Nationality: German

Marital status: single

Languages: german (of course)

english (quite well)

french (some basics)

Rewards

1991	W. Heraeus Förderpreis

Memberships

German Physical Society (DPG)

Reviews Performed

Microelectronics and Reliability

Teaching Activities

Teached part of the following courses at the Institute for Semiconductor Electronics II, RWTH Aachen:

1991-1994 Festkörpertechnologie I & II (Solid State Technology I & II)
Optoelektronik I & II (Optoelectronics I & II)
Halbleiterpraktikum (Laboratory Course on Semiconductor Characterization)

Research Funding

1995-1996 Alfred-Kastler Stipendiateship: "Cinétique de capture et de recombinaison des paires électron-trou dans les microstructures III-V GaAs/GaInP" (Cinetics of capture and recombination of electron-hole pairs in GaAs/GaInP III/V semiconductor heterostructures)

1991-1995 DFG (Deutsche Forschungsgemeinschaft) research project Ku-540/11: "Nichtlineare optische Untersuchungen in InGaAs(P)/InP- Quantentrogstrukturen" (Non-linear optical investigations on InGaAs(P) quantum well structures)

Diploma Students Supervised

1994-1995 A. Ziebell Thesis: Spektroskopische Untersuchung an Übergittern in III-V Halbleitersystemen (Spectroscopic Investigations on III-V Semiconductor Systems) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.

1992-1994 F. Brüggemann Thesis: Spektroskopische Untersuchungen an Übergittern in III-V-Halbleitersystemen (Spectroscopic Investigations on Superlattices in III-V Semiconductor Systems) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.

1990-1991 B. Gallmann Thesis: Optische Charakterisierung von verspannten InGaAs/InP Quantum Wells (Optical Characterization of Strained InGaAs/InP Quantum Wells) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.

1991 W. Rossbruch Aufbau eines rechnergesteuerten Gain-Spektroskopie Meßplatzes (Realisation of a Computer Controlled Gain-Spectroscopy Setup) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.

Student Research Projects Supervised

1994 U. Fähse Realisierung und Softwareunterstützung eines Meßplatzes für die temperaturaufgelöste Transmissionsspektroskopie (Realisation of and Software Support for a Experimental Setup for Temperature Resolved Transmission Spectroscopy) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.

Further Informations

List of publications
Presentations
Address
References are available upon request.

Homepage

Ralf Schwedler

02/05/95	Doctorate in Sciences, thesis: Grundlagen und Charakterisierung von Wannier-Stark Modulatoren ( Basic Properties and Characterization of Wannier-Stark Modulators ) (in German), at the Institute for Semiconductor Electronics (Prof. H. Kurz), Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany.
10/11/91	Diploma in Physics, thesis: Elektrolumineszenz- und Elektroabsorptionsspektroskopie an InP/InGaAs(P) Multi-Quantum-Well Strukturen ( Electro-luminescence and Electro-Absorption Spectroscopy on InP/InGaAs(P) Multi-Quantum Well Structures ) (in German), at the Institute for Semiconductor Electronics (Prof. H. Kurz), Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany.

since 03/01/1995	Postdoctoral researcher, Groupe d'Etudes des Semiconducteurs, Université Montpellier II, France. Optical spectroscopy, including picosecond time-resolved luminescence, of III/V semiconductors (GaInP/GaAs, InGaAs/InGaAs, GaN) and SiC. Carrier relaxation in disordered semiconductor material. Image processing, numerical simulations of optical properties and carrier relaxation, and all the related C, C++ and UNIX stuff. And, of course, I'm maintaining this WWW server and, much too often, the HP station on which it runs.
10/12/1991 - 1/31/1995	Research assistant, Institute for Semiconductor Electronics, Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany.
1989 - 1991	Student research assistant, Institute for Semiconductor Electronics, Rheinisch-Westfälische Technische Hochschule (RWTH), Aachen, Germany. Continous wave optical spectroscopy (photoluminescence, photocurrent, transmission, reflection, optical gain) on III/V semiconductor bulk material and heterostructures (InGaAs/InP, AlGaAs/GaAs, GaInP/GaAs, GaP, SiGe). Numerical simulations of band structure, confined electronic states, Wannier-Stark Effect, and ultrafast carrier dynamics in semiconductor heterostructures, under UNIX System V and Linux, using FORTRAN, C and C++. Analysis of experimental results from X-ray diffractometry, mass spectrometry and electron microscopy, and development of methods to correlate these results with optical properties. Managed CW-optical laboratory, including CW laser systems, optical cryostats and related vacuum technology, monochromators, detectors and spectrophotometer. Wrote software for data acquisition (GPIB, parallel busses) and visualization (GEM), using C and assembler. Installed and maintained UNIX System V (Atari Developers Release) machines including Motif, Networking (Mail, FTP, NFS, WWW), and ported lots of standard software (gcc, ghostscript, scientific visualization software) for that platform. Installed and maintained several LINUX boxes.
1987 - 1988	Student research assistant, Fraunhofer Institute for Laser Technology, Aachen, Germany. Welding and soldering using pulsed and quasi-CW Nd:YAG lasers. Wrote software for laser marking (Turbo Pascal, CPM) and image analysis and processing (ASYST, IBM Pascal, IBM/PC). Helped in installation and maintenance of Nd:YAG laser laboratory.
1987	Student research assistant, Workgroup Technology and Society, Nuclear Research Center, Jülich, Germany. Evaluated literature for a mainly sociological study on the future role of non-thermal laser applications.
1985 - 1987	Programmer, Data Beutner KG, Kellinghusen, Germany. Wrote educational programs on Schneider (aka Amstrad) and MSX microcomputers, in BASIC (I admit) and Z80 assembler.
1983 - 1984	Ambulance man, German Red Cross, Itzehoe, Germany, Germany.

Date of birth:	05/02/1963
Nationality:	German
Marital status:	single
Languages:	german	(of course)
	english	(quite well)
	french	(some basics)

1991-1994	Festkörpertechnologie I & II (Solid State Technology I & II)
	Optoelektronik I & II (Optoelectronics I & II)
	Halbleiterpraktikum (Laboratory Course on Semiconductor Characterization)

1995-1996	Alfred-Kastler Stipendiateship: "Cinétique de capture et de recombinaison des paires électron-trou dans les microstructures III-V GaAs/GaInP" (Cinetics of capture and recombination of electron-hole pairs in GaAs/GaInP III/V semiconductor heterostructures)
1991-1995	DFG (Deutsche Forschungsgemeinschaft) research project Ku-540/11: "Nichtlineare optische Untersuchungen in InGaAs(P)/InP- Quantentrogstrukturen" (Non-linear optical investigations on InGaAs(P) quantum well structures)

1994-1995	A. Ziebell	Thesis: Spektroskopische Untersuchung an Übergittern in III-V Halbleitersystemen (Spectroscopic Investigations on III-V Semiconductor Systems) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.
1992-1994	F. Brüggemann	Thesis: Spektroskopische Untersuchungen an Übergittern in III-V-Halbleitersystemen (Spectroscopic Investigations on Superlattices in III-V Semiconductor Systems) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.
1990-1991	B. Gallmann	Thesis: Optische Charakterisierung von verspannten InGaAs/InP Quantum Wells (Optical Characterization of Strained InGaAs/InP Quantum Wells) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.
1991	W. Rossbruch	Aufbau eines rechnergesteuerten Gain-Spektroskopie Meßplatzes (Realisation of a Computer Controlled Gain-Spectroscopy Setup) Institute for Semiconductor Electronics II, RWTH Aachen, Germany.