Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/78954
Title: | Technique and model for modifying the saturable absorption (SA) properties of 2D nanofilms by considering interband exciton recombination | Authors: | Liang, GW Zeng, LH Tsang, YH Tao, LL Tang, CY Cheng, PK Long, H Liu, X Li, J Qu, JL Wen, Q |
Issue Date: | 2018 | Source: | Journal of materials chemistry C, 28 July 2018, v. 6, no. 28, | Abstract: | In this study, we have successfully demonstrated a method of greatly modifying the nonlinear saturable absorption (SA) properties of WS2 nanofilms by controlling their thickness and morphology via magnetron sputtering deposition times. The nonlinear SA properties of these nanofilms were also investigated systematically under excitation by laser pulses with various durations in the fs, ps and ns ranges, and prominent ultrafast SA parameters were demonstrated for different pulse durations in the fs, ps and ns ranges. A pulse width-dependent theoretical model of SA that considers the effects of interband exciton recombination has now been proposed for the first time. Two analytical expressions for calculating the variation of key SA parameters (the onset fluence F-on and the modulation depth T) with the excitation laser pulse width have been derived and experimentally verified. The theoretical model and analytical expressions have great value for understanding and interpreting the variation of the SA behaviors of 2D nanofilms in the fs, ps and ns regions, and for the developments of ultrafast lasers and nanosecond lasers based on 2D materials. These studies open up exciting avenues for engineering the SA properties of 2D nanofilms for a wide range of laser photonic devices and applications. | Publisher: | Royal Society of Chemistry | Journal: | Journal of materials chemistry C | ISSN: | 2050-7526 | EISSN: | 2050-7534 | DOI: | 10.1039/c8tc00498f | Rights: | © The Royal Society of Chemistry 2018 Open Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (https://creativecommons.org/licenses/by/3.0/). The following publication Liang, G., Zeng, L., Tsang, Y. H., Tao, L., Tang, C. Y., Cheng, P. K., ... & Wen, Q. (2018). Technique and model for modifying the saturable absorption (SA) properties of 2D nanofilms by considering interband exciton recombination. Journal of Materials Chemistry C, 6(28), 7501-7511 is available at https://doi.org/10.1039/c8tc00498f |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Liang_Technique_Model_Modifying.pdf | 5.38 MB | Adobe PDF | View/Open |
Page views
110
Last Week
1
1
Last month
Citations as of Apr 28, 2024
Downloads
39
Citations as of Apr 28, 2024
SCOPUSTM
Citations
32
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
31
Last Week
0
0
Last month
Citations as of May 2, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.