Enhanced Ultrafast Broadband Reverse Saturable Absorption in Twistacenes with Enlarged π-Conjugated Central Bridge [PDF]
Molecules, 2022 Optical nonlinearities of two all-carbon twistacenes, DPyA and DPyN, with the different π-conjugated central bridges were investigated. The nonlinear absorption properties of these compounds were measured using the femtosecond Z-scan with wavelengths ...
Xindi Liu +7 more
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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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Enhancement of Broadband Reverse Saturable Absorption of Red/Black Phosphorus Heterojunction [PDF]
MoleculesAlthough laser technology brings convenience to production and daily life, it also causes high-energy damage. Therefore, there is an urgent need to develop optical limiting materials for laser protection. In this study, a novel nonlinear optical material,
Jingjing Wang +6 more
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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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Incoherent pumping-induced optical limiting [PDF]
Scientific ReportsThe nonlinear optical absorption of a probe field is investigated in a three-level V-type quantum system under a pump-probe configuration. It is demonstrated that the system exhibits saturable absorption (SA) behavior.
Noushin Parkan +3 more
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Cu-engineered TiO2 thin films: defect-driven nonlinear optical responses for ultrafast frequency conversion and optical limiting [PDF]
RSC AdvancesCu-doped TiO2 thin films with varying Cu concentrations were fabricated by spray pyrolysis to investigate the influence of Cu incorporation on their nonlinear optical (NLO) properties.
Navyashree B +10 more
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Free space few-photon nonlinearity in critically coupled polaritonic metasurfaces [PDF]
Nature CommunicationsFew-photon optical nonlinearity in planar solid-state systems is challenging yet crucial for quantum and classical optical information processing. Polaritonic nonlinear metasurfaces have emerged as a promising candidate to push the photon number down ...
Jie Fang +17 more
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Strengthened Optical Nonlinearity of V2C Hybrids Inlaid with Silver Nanoparticles
Nanomaterials, 2022 The investigation of nonlinear optical characteristics resulting from the light–matter interactions of two-dimensional (2D) nano materials has contributed to the extensive use of photonics.
Yabin Shao +5 more
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Molecules, 2023 Broadband reverse saturable absorption is systematically investigated via Z-scan, transient absorption spectrum (TAS). The excited state absorption and negative refraction of Orange IV are observed in the Z-scan experiment at 532 nm.
Quanhua Wu +9 more
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Low- and High-Order Optical Nonlinearities of Quantum Dots
Photonics, 2022 Various potential applications of quantum dots (QDs) require knowledge of their optical nonlinearities. In this review, the third-order nonlinearities responsible for the saturable absorption, two-photon absorption, reverse saturable absorption, and ...
Rashid A. Ganeev
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