Abstract
Abstract
Two-dimensional (2D) materials have drawn great interest for their applications in mode-locking due to their unique optical nonlinearities. However, most of these 2D materials are semi-conductors. In this study, a new kind of semi-metal indium bismuth (InBi) is reported which is a topological nodal-line semi-metal with exotic physical properties. The InBi nanomaterials were prepared through a liquid phase exfoliation method with an average thickness of 32.8 nm. The saturable absorption property was measured and passive mode-locking operation was successfully achieved in the Er-doped fiber laser. It exhibited a modulation depth of 3.21%, a saturable intensity of 100 MW cm−2 and a pulse width about 859.97 fs corresponding to the central wavelength of 1562.27 nm and 3 dB bandwidth of 2.98 nm. The experimental results open a new avenue for the use of semi-metals InBi nanomaterials in lasers and photonics applications.
Funder
Research and Development Plan in Key Areas of Guangdong Province
Guangdong Introducing Innovative and Enterpreneurial Teams of “The Pearl River Talent Recruitment Program”
National Key R&D Program of China under Grant
Basic and applied research fund of Guangdong Province
National Natural Science Foundation of China
One-Hundred Young Talents Program of Guangdong University of Technology
Subject
Surfaces, Coatings and Films,Acoustics and Ultrasonics,Condensed Matter Physics,Electronic, Optical and Magnetic Materials