报告题目：Semiconductor Research and THz Technologies –APath to Outstanding Novelties
Dr.ArashRahimi-Iman
Faculty of physics & Material sciences center
Philipps University Marburg, Germany
时间：11月11日，下午4:00-5:00，教12-201室 联系人：吴惠桢 教授
Abstract：Semiconductor research has advanced drastically in the last decades and enabled realization of new devices and the investigation of extraordinary phenomena. With the continuous optimization of epitaxial growth, novel nano- and micro-structures were provided. Thereby, distinguished effects in solids could be studied such as cavity quantum electro-dynamics, light-matter interaction and even the formation of Bose-Einstein condensation of exciton-polaritons and excitons which are both quasiparticles in semiconductor systems. One recent break-through on the way to a practical use of many-particle effects in solids was given by the first and unambiguous demonstration of an electrically driven polariton laser. In this talk, such a unique device is presented which operates in the strong-light-matter-coupling regime based on bosonic final-state stimulation.
THz radiation is nowadays broadly covered by a variety of sources. Owing to a better understanding of THz generation schemes and manipulation techniques, a practical use of THz radiation has evolved into many fields. However, THz sources are still expensive and not as efficient as many applications demand. Moreover, very unique and novel techniques are required to direct, manipulate and detect THz signal efficiently to give rise to a broad use of THz. Thus, further research on THz will improve its accessibility drastically. Nevertheless, THz is a promising candidate for use in the fields of security,bio-sensing, material research, medicine and industrial process control. This talk will give an overview on THz devices and systems developed in our group as well as our experimental methods.
Academic Background
Academic Background
2013 Assistant professor in experimental semiconductor physics at the Faculty of Physics,
University of Marburg, Germany, in the group of Professor Martin Koch:
Current research focus: Semiconductor lasers, ultra-fast optical spectroscopy, light-matter interaction in semiconductor systems
2009-2013 PhD studies at the Department of Applied Physics, University of Würzburg, Bavaria,
Germany, in the group of Professor Alfred Forchel:
Research topics: Realization and demonstration of an electrically driven polariton laser
within an international collaboration [1], exciton polariton Bose-Einstein condensation [2,3]
Light-matter interaction in microcavities in external magnetic fields [4]
2008/4-6 Visiting scholar at the Ginzton Laboratory, Stanford University, CA, USA, in the group
of Professor Yoshihisa Yamamoto:
Research topics: Light-matter interaction in microcavities and exciton polariton Bose-
Einstein condensation
2007-2009 Graduate studies in nanotechnology at the University of Würzburg:
Research specialization: Optically and electrically driven quantum-dot microcavities for
efficient single-photon generation, semiconductor spectroscopy
2006/8-9 Visiting student at the Max-Planck Institute of Solid State Physics in Stuttgart, Germany
2004-2007 Undergraduate studies in nanotechnology at the University of Würzburg:
Education in physics, nanotechnology, math and engineering phycics
欢迎有兴趣的老师和同学参加！
硅材料国家重点实验室
2013-11-7
