报告题目: Nanophotonics for Future Datacom and Ethernet Networks

　　报告人: Prof.Dr. Dieter Bimberg，Institute for Solid State Physics and Center of NanoPhotonics，Technische University Berlin

　　时间: 2013年11月12日 (星期二) 下午: 14:30

　　地点: 中国科学院半导体研究所学术会议中心

　　Abstract: Novel semiconductor edge and vertical surface emitting lasers and amplifiers based on nanostructures present the physical layer of future communication systems which demand larger and larger bandwidths up to multi Tb/sec and dramatically increased energy efficiency. InGaAs/GaAs-based VCSELs are enabling devices for short distance interconnects at wavelengths between 850 and 1300 nm. InGaAs quantum wells and/or stacked “submonolayer growth quantum dots” (SML-QDs) are used as active medium in these VCSELs. SML-QD based VCSELs exhibit an excellent temperature stability, which is one requirement to avoid gain saturation under strong electrical pumping for high photon densities and high bandwidth operation. The devices emitting at 980 nm show open eyes for 38 Gbit/s up to 85 °C and 49 Gbit/s operation at -14°C . At 850 nm we demonstrated open eyes with good S/N ratio up to ~40 Gbit/s . Such lasers show now a record low power dissipation of 59 fJ/bit at 25 Gbit/s at 25 Gbit/s . This number is equivalent to 59 mW/Tbit and thus below the magical limit of 100 mW/Tbit required by the ITRS roadmap for 2015.Electro-optical resonance modulation of VCSELs with a monolithically integrated electro-optical modulator allow intrinsic modulation bandwidth beyond 50 GHz and might allow datacom beyond 100 Gbit/s with one single device with still increased energy efficiency .

　　报告人简介：Dieter H. Bimberg received the Diploma in physics and the Ph.D. degree from Goethe University, Frankfurt, in 1968 and 1971, respectively. From 1972 to 1979 he held a Principal Scientist position at the Max Planck-Institute for Solid State Research in Grenoble/France and Stuttgart. In 1979 he was appointed as Professor of Electrical Engineering, Technical University of Aachen. Since 1981 he holds the Chair of Applied Solid State Physics at Technical University of Berlin. He was elected in 1990 Excecutive Director of the Solid State Physics Institute at TU Berlin, a position he hold until 2011. Since 2004 he is director of the Center of Nanophotonics at TU Berlin. From 2006 -2011 he was the chairman of the board of the German Federal Government Centers of Excellence in Nanotechnologies. His honors include the Russian State Prize in Science and Technology 2001, his election to the German Academy of Sciences Leopoldina in 2004 and to the Russian Academy of Sciences in 2011, as Fellow of the American Physical Society and IEEE in 2004 and 2010, respectively, the Max-Born-Award and Medal 2006, awarded jointly by IoP and DPG, the William Streifer Award of the Photonics Society of IEEE in 2010 and the UNESCO Nanoscience Medal 2012 . He has authored more than 1000 papers, 22 patents, and 6 books resulting in more than 33,000 citations worldwide and a Hirsch factor of 86. His research interests include the growth and physics of nanostructures and nanophotonic devices, ultrahigh speed and energy efficient photonic devices for future datacom systems, single/entangled photon emitters for quantum cryptography and ultimate nanomemories based on quantum dots.