AUTHOR=Yu Qiang , Chen Cheng , Guo Kun , Deng Haiqin , Yi Tianan , Zhang Yan , Su Wei , Wu Jian , Zhang Kai 

TITLE=Deterministic Transfer of Large-Scale β-Phase Arsenic on Fiber End Cap for Near-Infrared Ultrafast Pulse Generation

JOURNAL=Frontiers in Materials

VOLUME=8

YEAR=2021

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2021.721587

DOI=10.3389/fmats.2021.721587

ISSN=2296-8016

ABSTRACT=<p>Gray arsenic (<italic>β</italic>-phase) has aroused great attention in photonics and electronics applications, as a novel family member of two-dimensional (2D) elemental crystals of group-VA. Here, <italic>β</italic>-phase arsenic (<italic>β</italic>-As) bulk crystals were synthesized via the chemical vapor transport (CVT) method. Meanwhile, large-scale <italic>β</italic>-As nanoflake was transformed using the polydimethylsiloxane (PDMS)-assisted dry transfer method and was placed on the end cap of optical fiber with high coverage over the core area. Moreover, the <italic>β</italic>-As was used as a saturable absorber in ytterbium-doped fiber ring cavity resonance, and we demonstrated near-infrared ultrafast pulse fiber laser with the central wavelength, repetition rate, and signal-to-noise ratio (SNR) of 1,037.3 nm, 0.6 MHz, and 67.7 dB, respectively. This research demonstrates a 2D material small area deterministic transfer method and promotes the potential application of group-VA crystals in near-infrared ultrafast laser generation.</p>