Tellurene‐based saturable absorber to demonstrate large‐energy dissipative soliton and noise‐like pulse generations
Nannan Xu, Pengfei Ma, Shenggui Fu, Xinxin Shang, Shouzhen Jiang, Shuyun Wang, Dengwang Li, Huanian Zhang
Abstract
Abstract Two‐dimensional layered monoelemental materials (Xenes) with excellent optoelectronic properties have various property‐related applications, such as energy, biomedicine, and optoelectronic devices. Xenes also show excellent performance in acting as saturable absorbers (SAs) for obtaining ultrafast laser operations. Few‐layer tellurene as a typical Xenens exhibits distinct optoelectronic properties and promising practical application potential, and its nonlinear optical absorption characteristics and related ultrafast modulation applications have been investigated preliminarily. However, tellurene‐based SAs to demonstrate large‐energy mode‐locked operations, which have special applications in industrial and scientific research areas, are seldom studied. In this work, we focus on the preparation of tellurene‐based SAs and explore its applications in demonstrating large‐energy mode‐locked operations [dissipative soliton (DS) and noise‐like pulses (NLP)]. For DS operation, the maximum average output power, pulse width, and largest pulse energy are 23.61 mW, 5.87 ps, and 1.94 nJ, respectively. NLP operation with a recorded average output power of 106.6 mW and a pulse energy of 8.76 nJ is also generated, which shows significant enhancement in comparison to previously reported Xenes‐based works. Our contribution reveals the great potential and capacity of tellurene‐based SAs in obtaining large‐energy pulse operations and further promotes the explorative investigation of Xenes‐based optoelectronic devices.