直播|剑桥大学教授讲述层级材料的特性与应用

原文地址：http://news.sciencenet.cn/htmlnews/2023/6/502980.shtm

直播时间：2023年6月16日（周五）20:00-21:30

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北京时间2023年6月16日晚八点，iCANX Talks 第148期邀请到剑桥大学Andrea C. Ferrari 教授分享层级材料的特性与其在光电与量子领域的应用。更多精彩，敬请期待！

【嘉宾介绍】

Andrea C. Ferrari

University of Cambridge

Layered Materials: Characterization and Applications

【Abstract】

Graphene and layered materials (LMs) have great potential in photonics and optoelectronics, where the combination of their optical and electronic properties can be fully exploited, and the absence of a bandgap in graphene can be beneficial.

通过探索光电性质的结合，石墨烯材料与层状材料（LMs）被赋予了在光学与光电器件中巨大的应用潜力。其中，石墨烯材料的无带隙更是一项锦上添花的性质。

The linear dispersion of the Dirac electrons in graphene enables ultra-wide-band tunability as well as gate controllable third-harmonic enhancement over an ultra-broad bandwidth, paving the way for electrically tuneable broadband frequency converters for optical communications and signal processing. Saturable absorption is observed as a consequence of Pauli blocking and can be exploited for mode-locking of a variety of ultrafast and broadband lasers. Graphene integrated photonics is a platform for wafer scale manufacturing of modulators, detectors and switches for next generation datacom and telecom.

石墨烯中狄拉克电子的线性分布使得在超宽频率带中实现对光波的调控与三次谐波的门控增强成为可能，从而为制备可用于光学沟通与信号处理的电调谐宽带频率转换器铺设了道路。泡利阻塞导致的饱和吸收也可被应用于制备一系列超快超带宽激光的锁模。因此，通过实现对调制器，探测器与开关元件的大规模制备，基于石墨烯材料的集成光学器件可被用于构建新一代数据与电子通信技术平台。

Heterostructures based on LMs have properties different from those of their individual constituents and of their three dimensional counterparts. These can be exploited in novel light emitting devices, such as single photon emitters, and tuneable light emitting diodes. LMs have potential for quantum technologies, as scalable sources of single photon emitters (SPEs). Quantum emitters in LMs hold potential in terms of scalability, miniaturization, integration. Generation of quantum emission from the recombination of indirect excitons in heterostructures made of different LMs is a path with enormous potential. I will overview production, characterization and application of graphene and LMs, focusing optical and quantum applications.

层状材料所具有的异质结构使得其性质与对映的单组分材料或三维结构体都不相同。这种特性可被应用于开发新型光发射器件，如单光子发射器或可调制发光二极管。层状材料作为一种可增益单光子发射器，也具有被应用于量子技术的潜力，其包含的量子发射点具有可增益、可微型化、可集成等优越性质。其中，在层状材料组合而成的异质结构中结合间接激子而产生的量子激发效应具有巨大的应用潜力。在本次演讲中，我将对石墨烯材料与层状材料的制备、表征与应用进行概述，并着重介绍这两种材料在光电与量子领域的应用。

【BIOGRAPHY】

Andrea Ferrari is Professor of nanotechnology at the University of Cambridge and a Fellow of Pembroke College. He founded and directs the Cambridge Graphene Centre and the EPSRC Centre for Doctoral Training in Graphene Technology. He chairs the management panel and is the Science and Technology Officer of the European Graphene Flagship. He is a Fellow of the Royal Academy of Engineering, the American Physical Society, the Materials Research Society, the Institute of Physics, the Optical Society, the Royal Society of Chemistry, The European Academy of Sciences, the Academia Europaea, and he received numerous awards, such as the Royal Society Brian Mercer Award for Innovation, the Royal Society Wolfson Research Merit Award, the Marie Curie Excellence Award, the Philip Leverhulme Prize, The EU-40 Materials Prize.