Growth dynamics and light scattering of gold nanoparticles in situ synthesized at high concentration in thin polymer films

• Corentin Guyot,
• Philippe Vandestrick,
• Ingrid Marenne,
• Olivier Deparis and
• Michel Voué

Beilstein J. Nanotechnol. 2019, 10, 1768–1777, doi:10.3762/bjnano.10.172

• backscattering of light from plasmonic nanocomposites doped with AuNPs, which is problematic for fiber optics integration, e.g. in Q-switched fiber lasers. This important issue has so far not been addressed. In particular, we investigate the modifications of the scattering properties of nanocomposites induced by

• refractive index. Our observation that the in situ synthesis of NPs produces some roughness at the film surface and hence backscattering, is of importance for the integration of such Au nanocomposite films in Q-switched fiber lasers. Experimental Chemicals HAuCl4 and poly(vinyl alcohol) (PVA, 87–89

Fe₃O₄ nanoparticles as a saturable absorber for giant chirped pulse generation

• Ji-Shu Liu,
• Xiao-Hui Li,
• Abdul Qyyum,
• Yi-Xuan Guo,
• Tong Chai,
• Hua Xu and
• Jie Jiang

Beilstein J. Nanotechnol. 2019, 10, 1065–1072, doi:10.3762/bjnano.10.107

• , and optical modulators. Keywords: erbium laser; Fe3O4 nanoparticles; fiber lasers; saturable absorber; Introduction Fe3O4 nanoparticles (FONPs) are excellent magnetic materials, which allows for many applications in various fields such as medical transmission, microwave devices, and optical devices

• , the shortest pulse duration based on FONPs as a saturable absorber is 0.613 µs for fiber lasers [41]. However, to date, only Q-switched fiber lasers based on FONPs with microsecond pulse duration have been reported and no known reports of a FONP-based fiber laser with nanosecond pulse duration are

• /cm2, 2.5%, and 45.26%, respectively. These results confirm the applicability of the prepared FONP SA for pulsed fiber lasers. The FONP energy-dispersive spectroscopy (EDS) measurement results are shown in Figure 3a. The measured Fe and O elements represent 74.69% and 21.86%, respectively, which are

Oriented zinc oxide nanorods: A novel saturable absorber for lasers in the near-infrared

• Pavel Loiko,
• Tanujjal Bora,
• Josep Maria Serres,
• Haohai Yu,
• Magdalena Aguiló,
• Francesc Díaz,
• Uwe Griebner,
• Valentin Petrov,
• Xavier Mateos and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2018, 9, 2730–2740, doi:10.3762/bjnano.9.255

• polymer film have been previously applied as a SA only in Er and Yb fiber lasers. In the former case, the best pulse characteristics (duration/energy) were 3 µs/40 nJ corresponding to an output power of ≈3 mW at 1.561 µm [26]. The Yb fiber laser PQS by ZnO nanocrystals generated 1.6 µs/3 nJ pulses at