The development of stable coherent light sources at the nanoscale is of key significance for novel applications in nanophotonics and nanotechnology. Here we demonstrate the generation of stable self-Q-switched laser pulse trains in the ns and µs temporal domains while featuring subwavelength nanolasing spatial confinement [1]. The approach combines a Nd3+ doped Lithium Niobate crystal which provides laser gain in the NIR spectral region, plasmonic chains of Ag nanoparticles that enable subwavelength spatial confinement of laser radiation, and a 2D-monolayer (MoS2) acting as saturable absorber to achieve the temporal confinement of laser radiation.
The results pave the way for the integration of ultra-fast lasers at the nanoscale, in which the synergetic hybridization of the materials involved could benefit applications such as high-speed communications, advanced manufacturing, ultra-sensitive sensing or quantum computing, providing a wealth of opportunities for light manipulation and control at subwavelength scales.
References
[1] M. O Ramírez, P. Molina, D. Hernández-Pinilla, et al., Laser Photonics Rev. (in press), 2023. DOI:10.1002/lpor.202300817.
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