Donor-Acceptor Type Reduced Graphene-Oxide and a Tin-Selenide Nanohybrid With Broad and Ultrafast Optical Limiting Properties

Xiaoqin Li,Xiang Qi,Si Xiao,Yingwei Wang,Jun He,Yiduo Wang,Hui Wang

doi:10.3389/fphy.2020.00298

Xiaoqin Li, Xiang Qi + Show 5 more

Open Access

https://doi.org/10.3389/fphy.2020.00298

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Abstract

The nonlinear absorption properties of RGO have been studied extensively but the optical limiting (OL) performance of RGO was always confined to visible light. In this study, by anchoring SnSe nanosheets onto the surface of RGO, the SnSe/RGO nanohybrid shows a broader reverse saturable absorption (RSA), ranging from 400 nm to 800 nm, and enhanced nonlinear optical (NLO) response. The improvement of the NLO absorption response is attributed to a multiphoton-absorption process and electron-transfer effect in this artificially constructed donor-acceptor system. Pump-probe experiments suggest a response time of approximately 1.7-8 picoseconds for SnSe/RGO nanohybrid.

Highlights

Owing to its infinitesimally small thickness and strong light-matter interaction in a broadband, graphene and its derivatives has attracted tremendous attention for photonic application
The optical limiting (OL) properties of emerging 2D materials were studied in detail for MoS2 quantum dots [26], black phosphorus [27], and TiO2/reduced graphene-oxide (RGO) [28]
The predecessors used the liquid-phase exfoliation method to produce 2D ultrathin structural materials, and proved that the crystal characteristics did not change during the stripping process [38, 39]

Summary

Introduction

Owing to its infinitesimally small thickness and strong light-matter interaction in a broadband, graphene and its derivatives (such as graphene oxide, GO and reduced graphene oxide, RGO) has attracted tremendous attention for photonic application. 2D SnSe nanosheets are an ideal candidate for the construction of RGO-based hybrids that can extend their OL properties into the near infrared region. We constructed a SnSe/RGO nanohybrid using a hydrothermal method, and we confirmed a broadband OL property of an as-prepared nanohybrid, ranging from 400 to 800 nm.

Results

Conclusion