Hafnium Sulfide Nanosheets for Ultrafast Photonic Device

Group IVB transition metal dichalcogenides (TMDs) have attracted significant interests in photoelectronics due to their predictable superior physical properties compared to group VIB (Mo and W) TMDs. However, the nonlinear optical properties and ultrafast photonic devices based on group IVB TMDs rem...

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Bibliographic Details
Published in:Advanced optical materials 2019-03, Vol.7 (5), p.n/a
Main Authors: Yin, Jinde, Zhu, Fangxiang, Lai, Jintao, Chen, Hao, Zhang, Mengyu, Zhang, Jiaqiang, Wang, Jintao, He, Tingchao, Zhang, Bo, Yuan, Jianping, Yan, Peiguang, Ruan, Shuangchen
Format: Article
Language:English
Subjects:
Absorption
Crystal fibers
Fiber lasers
Hafnium compounds
hafnium sulfide
Materials science
Microfibers
Nanosheets
nonlinear optics
Optical properties
Optics
Photonic crystals
Physical properties
Pulse duration
Transition metal compounds
ultrafast photonics
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Summary:Group IVB transition metal dichalcogenides (TMDs) have attracted significant interests in photoelectronics due to their predictable superior physical properties compared to group VIB (Mo and W) TMDs. However, the nonlinear optical properties and ultrafast photonic devices based on group IVB TMDs remained unexplored so far. Herein, the nonlinear optical absorption of HfS2 nanosheets (NSs) prepared by liquid exfoliation is demonstrated. The usage of HfS2 as a new ultrafast photonic device for high‐energy and ultrashort pulse generation in a fiber laser is reported for the first time. A photonic crystal fiber (PCF) assisted deposition method is presented for the fabrication of an HfS2‐microfiber integrated saturable absorber (SA) device with precisely controllable light–matter interaction, which can benefit the output of the device. The HfS2‐microfiber SA device shows modulation depth of 15.7% and exhibits outstanding ultrashort pulse generation performance with pulse duration of 221.7 fs in the communication band. The experimental results suggest that HfS2 presents highly nonlinear optical absorption and can be developed into an excellent candidate of SA devices for the development of HfS2‐based ultrafast photonics. The nonlinear optical absorption of HfS2 nanosheets is demonstrated. Based on this nonlinear optical property, an HfS2‐based ultrafast photonic device is fabricated by integrating HfS2 with a microfiber. The usage of HfS2 for a new function of nonlinear optical materials in the generation of high‐energy and ultrashort pulses by fiber laser is reported.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.201801303