2019/12/22 by Chiara Trovatello, Andrea Marini, Trovatello, Chiara +26
Computer Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mechanical and Optical Resonators #Neural Networks and Reservoir Computing #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.1912.10466
openalex publication_date 2019/12/22 · openalex created_date 2023/03/08 · openalex updated_date 2026/07/28
Optical parametric amplification is a second-order nonlinear process whereby\nan optical signal is amplified by a pump via the generation of an idler field.\nIt is the key ingredient of tunable sources of radiation that play an important\nrole in several photonic applications. This mechanism is inherently related to\nspontaneous parametric down-conversion that currently constitutes the building\nblock for entangled photon pair generation, which has been exploited in modern\nquantum technologies ranging from computing to communications and cryptography.\nHere we demonstrate single-pass optical parametric amplification at the\nultimate thickness limit; using semiconducting transition-metal\ndichalcogenides, we show that amplification can be attained over a propagation\nthrough a single atomic layer. Such a second-order nonlinear interaction at the\n2D limit bypasses phase-matching requirements and achieves ultrabroad\namplification bandwidths. The amplification process is independent on the\nin-plane polarization of the impinging signal and pump fields. First-principle\ncalculations confirm the observed polarization invariance and linear\nrelationship between idler and pump powers. Our results pave the way for the\ndevelopment of atom-sized tunable sources of radiation with applications in\nnanophotonics and quantum information technology.\n