直播|劍橋大學教授講述層級材料的特性與應用

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

直播時間：2023年6月16日（周五）20:00-21:30

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北京時間2023年6月16日晚八點，iCANX Talks 第148期邀請到劍橋大學Andrea C. Ferrari 教授分享層級材料的特性與其在光電與量子領域的應用。更多精彩，敬請期待！

【嘉賓介紹】

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.

通過探索光電性質的結合，石墨烯材料與層狀材料（LMs）被賦予了在光學與光電器件中巨大的應用潛力。其中，石墨烯材料的無帶隙更是一項錦上添花的性質。

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.

石墨烯中狄拉克電子的線性分布使得在超寬頻率帶中實現對光波的調控與三次諧波的門控增強成為可能，從而為制備可用于光學溝通與信號處理的電調諧寬帶頻率轉換器鋪設了道路。泡利阻塞導致的飽和吸收也可被應用于制備一系列超快超帶寬激光的鎖模。因此，通過實現對調制器，探測器與開關元件的大規模制備，基于石墨烯材料的集成光學器件可被用于構建新一代數據與電子通信技術平臺。

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.

層狀材料所具有的異質結構使得其性質與對映的單組分材料或三維結構體都不相同。這種特性可被應用于開發新型光發射器件，如單光子發射器或可調制發光二極管。層狀材料作為一種可增益單光子發射器，也具有被應用于量子技術的潛力，其包含的量子發射點具有可增益、可微型化、可集成等優越性質。其中，在層狀材料組合而成的異質結構中結合間接激子而產生的量子激發效應具有巨大的應用潛力。在本次演講中，我將對石墨烯材料與層狀材料的制備、表征與應用進行概述，并著重介紹這兩種材料在光電與量子領域的應用。

【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.