VSe2 nanosheets for ultrafast fiber lasers. Issue 3 (17th December 2019)

• Record Type: Journal Article
• Authors: Li, Lu; Pang, Lihui; Zhao, Qiyi; Liu, Wenjun; Su, Yulong
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 3(2019)
• Page Start: 1104
• Page End: 1109
• Publication Date: 2019-12-17
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc06159b
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : In this work, we investigate VSe2 for generating femtosecond and large energy mode-locked laser pulses for the first time. Abstract : In this work, we investigate VSe2 for generating femtosecond and large energy mode-locked laser pulses for the first time. Two types of VSe2 based saturable absorbers (SAs), microfiber–VSe2 and VSe2 /polyvinyl alcohol (PVA), are prepared, which exhibit strong nonlinear optical characteristics with a modulation depth (Δ T ) of 22.5% and 1.849%, respectively. In contrast to other transition metal dichalcogenides (TMDCs), theoretical calculations show that VSe2 is a metallic TMDC SA. With the implementation of microfiber–VSe2, conventional soliton mode-locking Er-doped fiber (EDF) laser is demonstrated with an ultrashort pulse duration of 910 fs. Based on VSe2 /PVA, a large energy EDF laser is established. The maximum single pulse energy is 25.57 nJ. This study suggests that VSe2 possesses application potential in ultrafast photonics and provides a valuable strategy for the development of TMDC based devices with desirable optoelectronic properties.