报告介绍

报告介绍 We have measured the electron spin relaxation time in (111)-oriented GaAs quantum wells (QW) by time-resolved photoluminescence spectroscopy. By embedding the QWs in a PIN or NIP structure we demonstrate the tuning of the conduction band spin splitting and hence the spin relaxation time with an applied external electric field applied along the growth z direction. The application of an external elect...

报告介绍 超导能隙是超导中电子形成库伯对的直接后果，因而是理解超导微观机理的关键。比如常规的BCS超导中的电子是s波配对，具有各向同性的能隙；铜氧化物高温超导则是d波配对，能隙是各向异性，具有节点。一类新的高温超导体，铁基超导，于2008年发现之后，人们发现它的性质非常丰富。比如它既有节点，也有非节点的成员；既有电子和空穴两种费米面同时存在的成员，也有只有电子型费米面的成员。我们通过角分辨光电子能谱，测量了大量铁基超...

报告介绍 报告摘要：DNA moleculesstore genetic information and play a critical role in all living organisms. Our research focuses on engineering DNA (and also RNA) as both genetic (bio) and generic (nano) materials. More specifically, by treating DNA as a true polymer and employing a variety of enzymatic and physical tools, we can precisely control and manipulate DNA into nanoscale materials building blocks. ...

报告介绍 We present a theoretical evidence that a monopole emerges in dynamic magnetic systems in the presence of the spin-orbit interaction. The monopole field is expressed in terms of the spin damping associated with the magnetization dynamics. We demonstrate that the observation of this spin damping monopole is accomplished electrically by use of the Ampere's law for the monopole current. Our discovery su...

报告介绍 庄林教授简历：1989~1993年，武汉大学化学系，大学本科，获理学学士1993~1998年，武汉大学化学学院，研究生，获理学博士1998~2001年，武汉大学化学与分子科学学院，讲师2001~2003年，武汉大学化学与分子科学学院，副教授2003年至今，武汉大学化学与分子科学学院，教授，博士生导师2004~2005年，美国康奈尔大学材料研究中心，访问学者2011年至今，武汉大学珞珈特聘教授获奖与荣誉：2011 年获国家杰出青年科学基金2011 年获教育部自然...

报告介绍 报告摘要Come and learn:What is quantum gravity & why is it interesting?What is a gauge theory? How can a geometrical theory like classical general relativity be viewed as a gauge theory?What is loop quantum gravity? What is space-time foam?Are time machines possible?What about causality?What about topology?Conclusions: So what?报告人简介:Paul was born in New York. He received his B.A. in 1979 fr...

报告介绍 Majorana fermions are long-sought exotic particles that are their own antiparticles. In this talk, we show how to utilize superconducting circuits to construct two superconducting-qubit arrays where Majorana modes can occur. Moreover, we propose to use four superconducting qubits as the smallest system to demonstrate the braiding of Majorana modes and show how the states before and after braiding Ma...

报告介绍 报告摘要:非共价作用(如氢键、静电和疏水作用)普遍存在于天然金属酶中，对酶活化或底物催化过程有重要的协同作用，基于超分子化学理论的金属酶模拟在酶的活性中心亚稳态和次层结构的生物功能模拟具有极大的潜力。毛宗万教授课题组开展基于环糊精的金属酶模型的构建，并获得了重要成果。同时，毛宗万教授课题组设计了以环糊精修饰的纳米载体，用于化疗药物和siRNA的输送研究。所制备的量子点（CdSe、CdSe/CdS和CdSe/ZnSe等）经过L-精...

报告介绍 Abstract:Turing instability in activator-inhibitor systems provides a paradigm of non-equilibrium self-organization; it has been extensively investigated for biological and chemical processes. However, Turing instability is also possible in networks. They have studied Turing patterns in large random networks. The initial linear instability leads to spontaneous differentiation of the network nodes in...

报告介绍 In(Ga)As quantum dots on GaAs are very attractive candidates to confine single excitons and single spins serving as solid state qubits in a mature semiconductor platform. Quantum dots can be implemented to efficiently generate single photons or entangled photon pairs on demand. Light-matter interaction in coupled quantum dot-cavity systems can be largely controlled by embedding the quantum dots into...

报告介绍 报告摘要可再生新能源技术（包括光伏和动力电池等）是人类解决能源危机，气候变化等全球问题的必然方向。基于纳米材料和复合纳米结构的能源纳米器件是这一领域中的热点。在纳米尺度上对器件中的表、界面结构和电信号的分析将加深我们对器件机理的认识，指导新器件设计和性能提升。这里我们将首先介绍新型有机／无机复合光伏电池和薄膜有机光伏电池研究，特别是器件中的界面对性能的决定性影响；其次，在储能技术方面，锂离子电池已广...

报告介绍 Electrical energy storage holds the key to wider adoption of renewable energy. Electrical double layer capacitors (or supercapacitors) and Li-ion batteries are two complementary technologies for storing electricity, both involving a working solid/electrolyte interface. Despite their commercialization, some fundamental questions remain unanswered. Supercapacitors store energy as the charge on the sur...

报告介绍 This talk presents the combination of “bottom-up” layer-by-layer (LbL) nano self-assembly and “top-down” micromanufacturing techniques to fabricate MEMS and flexible electronics for biomedical applications. With nano self-assembly and surface micromachining, highly flexible nanoparticle-based cantilever platform for micro sensing and actuation was investigated successfully. W...

报告介绍 Optical antennas or plasmonic antennas are nanoscale metallic structures which act as effective receivers, transmitters and receivers of visible light. Different canonical nanostructures such as metallic nanorings [1], nanorods [2], nanowires [3], dimers [4] or nanoshells [5] are commonly used as optical nanoantennas. These nanoatennas show the ability to focus electromagnetic radiation into tiny sp...

报告介绍 We report the first observation of polarization- and detection angle- dependent spontaneous emission in artificial atoms-semiconductor quantum dots. Using angle resolved white-light transmission spectroscopy we identified local in- and out-of-disc-plane surface plasmon (SP) resonances in the gold array. After depositing CdSe/ZnS (core/shell) nanocrystals on the array, we measured photoluminescence (...