Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Corrections to the Reflectance of Graphene by Light Emission

Ken-ichi Sasaki
* ORCID logo ,
Kenichi Hitachi
,
Masahiro Kamada
,
Takamoto Yokosawa
ORCID logo ,
Taisuke Ochi
ORCID logo ,
Tomohiro Matsui
ORCID logo
Version 1 : Received: 16 January 2024 / Approved: 16 January 2024 / Online: 17 January 2024 (14:26:16 CET)

A peer-reviewed article of this Preprint also exists.

Sasaki, K.-I.; Hitachi, K.; Kamada, M.; Yokosawa, T.; Ochi, T.; Matsui, T. Introducing Corrections to the Reflectance of Graphene by Light Emission. C 2024, 10, 18. Sasaki, K.-I.; Hitachi, K.; Kamada, M.; Yokosawa, T.; Ochi, T.; Matsui, T. Introducing Corrections to the Reflectance of Graphene by Light Emission. C 2024, 10, 18.

Abstract

Monolayer graphene absorbs 2.3 percent of the incident visible light. This “small” absorption has been used to emphasize the visual transparency of graphene, but it in fact means that multilayer graphene absorbs a sizable fraction of incident light, which causes non-negligible fluorescence. In this paper, we formulate the light emission properties of multilayer graphene composed of tens to hundreds of layers using a transfer matrix method and confirm the method’s validity experimentally. We could quantitatively explain the measured contrasts of multilayer graphene on SiO2/Si substrates and found sizable corrections, which cannot be classified as incoherent light emissions, to the reflectance of visible light. The new component originates from coherent emission caused by absorption at each graphene layer. Multilayer graphene thus functions as a partial coherent light source of various wavelengths, and it may have surface-emitting laser applications.

Keywords

graphene, reflectivity, light emission, coherence, substrate effects, transfer matrix method

Subject

Physical Sciences, Optics and Photonics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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