journal article·2015-07-28Open access

Direct Observation of Degenerate Two-Photon Absorption and Its Saturation in WS2 and MoS2 Monolayer and Few-Layer Films

Saifeng Zhang, Ningning Dong, Niall McEvoy, Maria O’Brien, Sinéad Winters, Nina C. Berner, Chanyoung Yim, Yuanxin Li, Xiaoyan Zhang, Zhanghai Chen, Long Zhang, Georg S. Duesberg, Jun Wang

ACS Nano· Volume 9· Issue 7

Abstract

The optical nonlinearity of WS2 and MoS2 monolayer and few-layer films was investigated using the Z-scan technique with femtosecond pulses from the visible to the near-infrared range. The nonlinear absorption of few- and multilayer WS2 and MoS2 films and their dependences on excitation wavelength were studied. WS2 films with 1-3 layers exhibited a giant two-photon absorption (TPA) coefficient as high as (1.0 ± 0.8) × 10(4) cm/GW. TPA saturation was observed for the WS2 film with 1-3 layers and for the MoS2 film with 25-27 layers. The giant nonlinearity of WS2 and MoS2 films is attributed to a two-dimensional confinement, a giant exciton effect, and the band edge resonance of TPA.
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Research context

OpenAlex topics: 2D Materials and Applications · Nonlinear Optical Materials Studies · Advanced Fiber Laser Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College Dublin, Dublin 2, Ireland

School of Chemistry, Trinity College Dublin, Dublin 2, Ireland

State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China

State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Funding

Bureau of Internationa Co-operation, Chinese Academy of Sciences · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Science Foundation Ireland

References (54)

Show source-provided references
1. 10.1021/nn305301b10.1021/nn305301b ↗
2. 10.1021/nn403886t10.1021/nn403886t ↗
3. 10.1039/C4NR02634A10.1039/C4NR02634A ↗
4. 10.1364/OME.5.00037310.1364/OME.5.000373 ↗
5. 10.1002/adma.20130632210.1002/adma.201306322 ↗
6. 10.1364/OE.22.00724910.1364/OE.22.007249 ↗
7. 10.1364/OL.39.00645010.1364/OL.39.006450 ↗
8. 10.1038/srep0796510.1038/srep07965 ↗
9. 10.1021/jp055959t10.1021/jp055959t ↗
10. 10.1126/science.125056410.1126/science.1250564 ↗
11. 10.1103/PhysRevB.87.16140310.1103/PhysRevB.87.161403 ↗
12. 10.1038/srep0553010.1038/srep05530 ↗
13. 10.1103/PhysRevB.87.20140110.1103/PhysRevB.87.201401 ↗
14. 10.1021/nl401561r10.1021/nl401561r ↗
15. 10.1103/PhysRevLett.105.09740110.1103/PhysRevLett.105.097401 ↗
16. 10.1364/PRJ.3.000A5110.1364/PRJ.3.000A51 ↗
17. 10.1002/smll.20110265410.1002/smll.201102654 ↗
18. 10.1016/j.apsusc.2014.01.10310.1016/j.apsusc.2014.01.103 ↗
19. 10.1038/srep0175510.1038/srep01755 ↗
20. 10.1002/adma.20110479810.1002/adma.201104798 ↗
21. 10.1021/nn403454e10.1021/nn403454e ↗
22. 10.1021/nl302635710.1021/nl3026357 ↗
23. 10.1063/1.486810810.1063/1.4868108 ↗
24. 10.1002/adfm.20110211110.1002/adfm.201102111 ↗
25. 10.1021/nn100393710.1021/nn1003937 ↗
26. 10.1039/c3nr03052k10.1039/c3nr03052k ↗
27. 10.1364/OE.23.00055910.1364/OE.23.000559 ↗
28. 10.1063/1.326496410.1063/1.3264964 ↗
29. 10.1021/nl302389d10.1021/nl302389d ↗
30. 10.1103/PhysRevB.85.03330510.1103/PhysRevB.85.033305 ↗
31. 10.1021/nn305275h10.1021/nn305275h ↗
32. 10.1109/3.5339410.1109/3.53394 ↗
33. 10.1038/srep0553010.1038/srep05530 ↗
34. 10.1038/srep0160810.1038/srep01608 ↗
35. 10.1103/PhysRevLett.114.09740310.1103/PhysRevLett.114.097403 ↗
36. 10.1103/PhysRevLett.113.02680310.1103/PhysRevLett.113.026803 ↗
37. 10.1103/PhysRevB.89.23541010.1103/PhysRevB.89.235410 ↗
38. 10.1103/PhysRevB.89.08110210.1103/PhysRevB.89.081102 ↗
39. 10.1109/JQE.1986.107296410.1109/JQE.1986.1072964 ↗
40. 10.1117/12.797353810.1117/12.7973538 ↗
41. 10.1103/PhysRevB.13.351510.1103/PhysRevB.13.3515 ↗
42. 10.1021/nl200587h10.1021/nl200587h ↗
43. 10.1103/PhysRevB.86.11540910.1103/PhysRevB.86.115409 ↗
44. 10.1103/PhysRevLett.111.21680510.1103/PhysRevLett.111.216805 ↗
45. 10.1103/PhysRevLett.105.13680510.1103/PhysRevLett.105.136805 ↗
46. 10.1021/nl903868w10.1021/nl903868w ↗
47. 10.1103/PhysRevLett.77.163210.1103/PhysRevLett.77.1632 ↗
48. 10.1063/1.279599710.1063/1.2795997 ↗
49. 10.1002/lpor.20150005210.1002/lpor.201500052 ↗
50. 10.1364/OE.22.03111310.1364/OE.22.031113 ↗
51. 10.1021/nn302517310.1021/nn3025173 ↗
52. 10.1063/1.490183610.1063/1.4901836 ↗
53. Fujiwara, H.Spectroscopic Ellipsometry: Principles and Applications;John Wiley & Sons Ltd.:New York, 2007; pp81–87.10.1002/9780470060193 ↗
54. 10.1063/1.11806410.1063/1.118064 ↗