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2D Graphene Oxide: A Versatile Thermo‐Optic Material.

Authors :
Hu, Junkai
Wu, Jiayang
Liu, Wenbo
Jin, Di
Dirani, Houssein El
Kerdiles, Sébastien
Sciancalepore, Corrado
Demongodin, Pierre
Grillet, Christian
Monat, Christelle
Huang, Duan
Jia, Baohua
Moss, David J.
Source :
Advanced Functional Materials. Jun2024, p1. 16p. 9 Illustrations.
Publication Year :
2024

Abstract

Efficient heat management and control in optical devices, facilitated by advanced thermo‐optic materials, are critical for many applications such as photovoltaics, thermal emitters, mode‐locked lasers, and optical switches. Here, a range of thermo‐optic properties of 2D graphene oxide (GO) films are investigated by precisely integrating them onto microring resonators (MRRs) with control over the film thicknesses and lengths. The refractive index, extinction coefficient, thermo‐optic coefficient, and thermal conductivity for the GO films with different layer numbers and degrees of reduction, as well as reversible reduction and enhanced optical bistability induced by the photo‐thermal effects, are comprehensively characterized. Experimental results show that the thermo‐optic properties of 2D GO films vary widely with the degree of reduction. In addition, significant anisotropy is observed for the thermo‐optic response, enabling efficient polarization‐sensitive devices. The versatile thermo‐optic response of 2D GO substantially expands the scope of functionalities and devices that can be engineered, making it promising for a diverse range of thermo‐optic applications. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1616301X
Database :
Academic Search Index
Journal :
Advanced Functional Materials
Publication Type :
Academic Journal
Accession number :
178108979
Full Text :
https://doi.org/10.1002/adfm.202406799