Laser-induced white-light emission from graphene ceramics–opening a band gap in graphene

作     者：Wieslaw Strek Bartlomiej Cichy Lukasz Radosinski Pawel Gluchowski Lukasz Marciniak Mikolaj Lukaszewicz Dariusz Hreniak 

作者机构：Polish Academy of SciencesInstitute of Low Temperatures and Structural Research50-422 WroclawPoland Wroclaw University of TechnologyGroup of Chemical and Biochemical Processes50-370 WroclawPoland 

出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)

年 卷 期：2015年第4卷第1期

页      面：545-552页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：This work was supported by Wroclaw Research Centre EIT1 within the framework of the project‘The Application of Nanotechnology in Advanced Materials’-NanoMat(POIG.01.01.02-02-002/08)financed by the European Regional Development Fund(Operational Programme Innovative Economy 1.1.2) 

主　　题：ceramics graphene photoluminescence white light 

摘      要：Recent theoretical and experimental studies have indicated the existence of a new stable phase of carbon with mixed sp^(2) and sp^(3) hybridized bonds—*** a two-layered structure with sp^(2)/sp^(3) bonds may be observed after the photostimulation of highly oriented pyrolytic graphene with femtosecond laser *** hidden multistability of graphene may be used to create a semiconducting phase immersed in the semimetallic continuum,resulting in bandgap *** demonstrate that bandgap opening and light emission from graphene is possible using continuous-wave laser beams with wavelengths from the visible(405 nm)to the near-infrared range(975 nm).We demonstrate that without the application of cooling,the effective temperature of the emitting sample remains lower than 900 K,which is far below the value predicted by the theory of black-body ***,light emission from a graphene sample may be observed at temperatures as low as 10 K.