xviii
Acknowledgments
and quantum structures, for the valuable discussions and for enabling the joint
grant application for a Sino–German symposium, as well as cooperation group.
I am also grateful to his team members for their help and commitment, such as
R. Li, W. Kong, B. Zhang, P. Lu, and many more, some of whom even joined my
team as visiting Ph.D. students. Without them, joint research work on graphene,
perovskites, nanoparticles, or 2D GaTe would be impossible.
• Similarly, special thanks are devoted to Prof. W. Fang and Prof. L. Tong from the
State Key Laboratory of Modern Optical Instrumentation and College of Optical
Science and Engineering of the ZJU in Hangzhou, China, for hosting me in their
group multiple times, for inviting me to set up a joint course, for the fruitful collaboration on nanophotonics, and for the valuable discussions. I am also grateful to
their team members for their help and commitment, such as Dr. W. D. Shen, X.
Lin, P. Qing, J. Gong, N. Yao.
• I would like to thank Prof. W. Stolz and his co-workers from the Materials Sciences
Center in Marburg and NAsP III/V GmbH, among others Dr. P. Hens, S. Reinhard,
P. Ludewig, A. Ruiz Perez, and many more, for the supply with high-performance
quantum-well semiconductor disk laser chips or other MOCVD-grown samples.
These enabled outstanding results and the investigation of the novel self-modelocking effect in VECSELs. In this context, semiconductor disk laser modelling
support, which is behind a long-term optimisation of laser chip structures, by
Prof. S. W. Koch and his co-workers, also in collaboration with his international
partners from Tucson, AZ, USA, is acknowledged. Also, helpful semiconductor
crystal characterisation by Prof. K. Volz, Dr. K. Gries, and co-workers from the
Materials Sciences Center is acknowledged.
• Special thanks are devoted to Dr. M. Jetter, Prof. P. Michler, R. Bek, H. Kahle,
M. Grossmann, and co-workers from the Center for Integrated Quantum Science
and Technology (IQST) and SCoPE, Institut für Halbleiteroptik und Funktionelle
Grenzflächen, for the fruitful cooperation on semiconductor disk lasers and also
for the supply with VECSEL chips. This enabled the study of self-mode-locking in
the visible spectral range and the investigation of nonlinear lensing in VECSELs.
• I would also like to thank Prof. E. U. Rafailov, Dr. K. A. Fedorova, and co-workers
from the Aston University, Birmingham, UK, for the fruitful collaboration on
quantum-dot semiconductor disk lasers and also for the supply with VECSEL
chips and SESAMs. This made possible the demonstration of record-high output
powers from quantum-dot VECSELs and even self-mode-locking with a quantumdot VECSEL delivering sub-picosecond light pulses by my team members, mainly
D. Al Nakdali and M. A. Gaafar, respectively.
• The fruitful collaboration on organic semiconductors for optoelectronics with
Prof. U. Lemmer from the Karlsruhe Institute of Technology, and his team
members, such as Dr. I. A. Howard, A. P. Arndt, and co-workers, is acknowledged. On the Marburg side, I am thankful to team members M. Gerhard, M.-U.
Halbich, and M. Bilal, who were successfully involved and who carried out the
experiments.
• Also, the fruitful collaboration on novel materials with Prof. S. Dehnen and Dr.
J. Heine from the Department of Chemistry, and their team members, such as G.
Acknowledgments
and quantum structures, for the valuable discussions and for enabling the joint
grant application for a Sino–German symposium, as well as cooperation group.
I am also grateful to his team members for their help and commitment, such as
R. Li, W. Kong, B. Zhang, P. Lu, and many more, some of whom even joined my
team as visiting Ph.D. students. Without them, joint research work on graphene,
perovskites, nanoparticles, or 2D GaTe would be impossible.
• Similarly, special thanks are devoted to Prof. W. Fang and Prof. L. Tong from the
State Key Laboratory of Modern Optical Instrumentation and College of Optical
Science and Engineering of the ZJU in Hangzhou, China, for hosting me in their
group multiple times, for inviting me to set up a joint course, for the fruitful collaboration on nanophotonics, and for the valuable discussions. I am also grateful to
their team members for their help and commitment, such as Dr. W. D. Shen, X.
Lin, P. Qing, J. Gong, N. Yao.
• I would like to thank Prof. W. Stolz and his co-workers from the Materials Sciences
Center in Marburg and NAsP III/V GmbH, among others Dr. P. Hens, S. Reinhard,
P. Ludewig, A. Ruiz Perez, and many more, for the supply with high-performance
quantum-well semiconductor disk laser chips or other MOCVD-grown samples.
These enabled outstanding results and the investigation of the novel self-modelocking effect in VECSELs. In this context, semiconductor disk laser modelling
support, which is behind a long-term optimisation of laser chip structures, by
Prof. S. W. Koch and his co-workers, also in collaboration with his international
partners from Tucson, AZ, USA, is acknowledged. Also, helpful semiconductor
crystal characterisation by Prof. K. Volz, Dr. K. Gries, and co-workers from the
Materials Sciences Center is acknowledged.
• Special thanks are devoted to Dr. M. Jetter, Prof. P. Michler, R. Bek, H. Kahle,
M. Grossmann, and co-workers from the Center for Integrated Quantum Science
and Technology (IQST) and SCoPE, Institut für Halbleiteroptik und Funktionelle
Grenzflächen, for the fruitful cooperation on semiconductor disk lasers and also
for the supply with VECSEL chips. This enabled the study of self-mode-locking in
the visible spectral range and the investigation of nonlinear lensing in VECSELs.
• I would also like to thank Prof. E. U. Rafailov, Dr. K. A. Fedorova, and co-workers
from the Aston University, Birmingham, UK, for the fruitful collaboration on
quantum-dot semiconductor disk lasers and also for the supply with VECSEL
chips and SESAMs. This made possible the demonstration of record-high output
powers from quantum-dot VECSELs and even self-mode-locking with a quantumdot VECSEL delivering sub-picosecond light pulses by my team members, mainly
D. Al Nakdali and M. A. Gaafar, respectively.
• The fruitful collaboration on organic semiconductors for optoelectronics with
Prof. U. Lemmer from the Karlsruhe Institute of Technology, and his team
members, such as Dr. I. A. Howard, A. P. Arndt, and co-workers, is acknowledged. On the Marburg side, I am thankful to team members M. Gerhard, M.-U.
Halbich, and M. Bilal, who were successfully involved and who carried out the
experiments.
• Also, the fruitful collaboration on novel materials with Prof. S. Dehnen and Dr.
J. Heine from the Department of Chemistry, and their team members, such as G.