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

Wieslaw Strek; Bartlomiej Cichy; Lukasz Radosinski; Pawel Gluchowski; Lukasz Marciniak; Mikolaj Lukaszewicz; Dariusz Hreniak

doi:10.1038/lsa.2015.10

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

Original Articles

- Laser-induced white-light emission from graphene ceramics–opening a band gap in graphene
- Laser-induced white-light emission from graphene ceramics–opening a band gap in graphene
- LSA 2015年4卷第1期
- Affiliations：
  
  1.Polish Academy of Sciences, Institute of Low Temperatures and Structural Research, 50-422 Wroclaw, Poland
  2.Wroclaw University of Technology, Group of Chemical and Biochemical Processes, 50-370 Wroclaw, Poland
- Author bio：
  
  B Cichy, Polish Academy of Sciences, Institute of Low Temperatures and Structural Research, Okolna 2, 50-422 Wroclaw, Poland E-mail: b.cichy@int.pan.wroc.pl
- Funds：
- DOI：10.1038/lsa.2015.10
  中图分类号：
- 纸质出版日期：2015-03，
  
  网络出版日期：2014-11-19，
  
  收稿日期：2014-07-16，
  
  修回日期：2014-10-31，
  
  录用日期：2014-11-04
- Accepted：
Scan QR Code
Laser-induced white-light emission from graphene ceramics–opening a band gap in graphene[J]. LSA, 2015,4(1).

Strek, W. et al. Laser-induced white-light emission from graphene ceramics–opening a band gap in graphene. Light: Science & Applications, 4, e237 (2015).
Laser-induced white-light emission from graphene ceramics–opening a band gap in graphene[J]. LSA, 2015,4(1). DOI： 10.1038/lsa.2015.10.

Strek, W. et al. Laser-induced white-light emission from graphene ceramics–opening a band gap in graphene. Light: Science & Applications, 4, e237 (2015). DOI： 10.1038/lsa.2015.10.

摘要

Abstract

Recent theoretical and experimental studies have indicated the existence of a new stable phase of carbon with mixed sp

and sp

hybridized bonds—diaphite. Such a two-layered structure with sp

/sp

bonds may be observed after the photostimulation of highly oriented pyrolytic graphene with femtosecond laser pulses. This hidden multistability of graphene may be used to create a semiconducting phase immersed in the semimetallic continuum

resulting in bandgap opening. We 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 radiation. Moreover

light emission from a graphene sample may be observed at temperatures as low as 10 K.

关键词

Keywords

ceramicsgraphenephotoluminescencewhite light

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