Broadband saturable absorption in germanene for mode-locked Yb, Er, and Tm fiber lasers [PDF]
Nanophotonics, 2022 Passively mode-locked lasers have been widely investigated as one of the effective methods to obtain ultrashort pulses. As an important part of passively mode-locked fiber lasers, the exploration of 2D material-based saturable absorber has become one of ...
Wang Qingbo +7 more
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Substrate and Excitation Intensity Dependence of Saturable Absorption in Perovskite Quantum Dot Films [PDF]
Nanomaterials, 2023 Saturable absorption in perovskite quantum dot (PQD) films, leading to saturation in photoluminescence (PL), is reported. PL of drop-casting films was used to probe how excitation intensity and host–substrate influence the growth of PL intensity. The PQD
Mithun Bhowmick +4 more
doaj +2 more sources
Paradoxical combination of saturable absorption and reverse-saturable absorption in plasmon semiconductor nanocrystals. [PDF]
Nanoscale Adv, 2020 The competition between plasma ground-state bleaching and three-photon absorption is demonstrated to be responsible for the transition between saturable absorption and reverse saturable absorption in aluminum-doped ZnO nanocrystals.
Tian X, Wei R, Yang D, Qiu J.
europepmc +4 more sources
Controlling Stimulated Emission via Intramolecular Charge Transfer in Amino-Coumarin Dyes: Switching from Reverse Saturable to Saturable Absorption [PDF]
MoleculesGiven the pivotal role of coumarins as tunable nonlinear optical (NLO) materials for advanced photonics, this study aims to decipher the regulatory mechanisms governing their excited-state dynamics and nonlinear absorption.
Jidong Jia +6 more
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Terahertz Saturable Absorption in Superconducting Metamaterials
Journal of the Optical Society of America B, 2016 We present a superconducting metamaterial saturable absorber at terahertz frequencies. The absorber consists of an array of split ring resonators (SRRs) etched from a 100nm YBaCu3O7 (YBCO) film.
Averitt, Richard D. +4 more
core +3 more sources
Intrinsic optical bistability via switching between saturable and reverse saturable absorption [PDF]
Scientific ReportsWe present a novel approach to achieving intrinsic optical bistability and multistability through the interplay between saturable and reverse saturable absorption. Our findings reveal that the stable points on the optical bistability curve align with the
Seyed Morteza Mousavi, Mohammad Mahmoudi
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2D Chalcogenide Thin Films for Super-Resolved Laser Structuring [PDF]
EPJ Web of Conferences, 2023 The saturable absorption behaviour associated with chalcogenide thin films has been investigated and optimized using Z-Scan Technique. Huge saturable absorption responses (of the order of 10^-7 m/W) were observed for the Bismuth Selenide thin films ...
Karimbana-Kandy Arjun +3 more
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Miniaturized saturated absorption spectrometer [PDF]
Review of Scientific Instruments, 2020 We describe a saturated absorption spectrometer that is robust and compact and requires minimum alignment, which is made possible by using a diffuse probe beam generated by a retro-reflecting film. This concept was studied and implemented in a miniaturized home-built setup that provides the same performance as an optimized table-top setup.
K. Sosa, J. Oreggioni, H. Failache
openaire +3 more sources
Femtosecond Optical Nonlinearity of Nanodiamond Suspensions
Applied Sciences, 2021 High pressure-high temperature (HP-HT) nanodiamonds and detonation nanodiamonds have unique optical properties and are promising materials for various applications in photonics.
Gennady M. Mikheev +6 more
doaj +1 more source
Graphene Saturable Absorber Mirrors for Silicon Photonic Platforms
IEEE Photonics Journal, 2022 We employ graphene saturable absorption for the theoretical demonstration of saturable absorption mirrors based on planar silicon photonic Bragg gratings.
Dimitrios Chatzidimitriou +2 more
doaj +1 more source