Reverse saturable absorption effect in the 2-cyclo-octylamino 5-nitropyridine-fullerene-doped system

2000 ◽  
Author(s):  
Natalia V. Kamanina ◽  
Lev N. Kaporskii ◽  
Alfonso Barrientos ◽  
Alexander Leyderman
Keyword(s):  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Absorption Effect

Dynamic Response Characteristics of Super-Gaussian Pulse to Reverse Saturable Absorption Effect

2012 ◽  
Vol 39 (2) ◽  
pp. 0202002
Author(s):  
程坤 Cheng Kun ◽  
赵军普 Zhao Junpu ◽  
胡东霞 Hu Dongxia ◽  
代万俊 Dai Wanjun ◽  
袁强 Yuan Qiang ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Gaussian Pulse ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Absorption Effect ◽  
Response Characteristics ◽  
Dynamic Response Characteristics

Illustrious influence of amino acid L-threonine (LT) on structural and optical insights of Zinc Thiourea Sulphate (ZTS) crystal

2019 ◽  
Vol 33 (04) ◽  
pp. 1950010 ◽  
Author(s):  
R. B. Kulkarni ◽  
M. Anis ◽  
S. S. Hussaini ◽  
M. D. Shirsat
Keyword(s):  
Negative Refraction ◽  
Second Harmonic ◽  
Visible Region ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Slight Variation ◽  
Absorption Effect ◽  
Orthorhombic Crystal Structure ◽  
Violet Emission ◽  
Cell Parameters

Mentioned communication explores the modification in properties of Zinc Thiourea Sulphate (ZTS) crystal due to L-Threonine (LT) addition. Superior quality LT-doped ZTS crystal with 0.5 M% concentration of LT was grown by the slow evaporation solution growth technique. Powder X-ray diffraction technique was applied to study the cell parameters which confirmed orthorhombic crystal structure of both pure and LT-ZTS crystal with slight variation in cell parameters. Shimatzu make spectrophotometer confirmed the UV-Visible spectral analysis in the range of 200–900 nm which affirmed the 94% transmittance, enhanced bandgap value (4.72 eV), lower cut-off value (246 nm) and lower optical constants viz. extinction coefficient, polarizability, refractive index, and reflectance of LT-ZTS crystal. The higher second harmonic generation (SHG) efficiency of LT-doped ZTS was pointed by Kurtz Perry powder method (3.06 times of pure ZTS crystal and 3.62 times of KDP crystal) using Nd: YAG laser. The colour centered emission and electronic purity of parent and doped ZTS crystals were examined which resulted in the violet emission in visible region for both pure and LT-ZTS crystals. Z-scan technique is used to identify the Kerr lensing nonlinearity in pure and LT-doped ZTS crystal. Close aperture Z-scan curve demonstrated negative refraction nonlinearity (self-defocusing nature) for pure and positive refraction nonlinearity (self-focusing nature) for LT-ZTS crystal. Calculated value of refraction nonlinearity n2 is −2.2 × 10[Formula: see text] cm2/W for pure ZTS and [Formula: see text]4.99 × 10[Formula: see text] cm2/W for LT-ZTS crystal. Open aperture Z-scan showed reverse saturable absorption effect (RSA) in pure ZTS and saturable absorption effect (SA) in LT-ZTS crystal. The [Formula: see text] value is 2.85 × 10[Formula: see text] cm/W for pure ZTS and 3.92 × 10[Formula: see text] cm/W for LT-ZTS crystal. The [Formula: see text]3 of ZTS crystal is 6.133 × 10[Formula: see text] cm/W and 1.655 × 10[Formula: see text] cm2/W for LT-ZTS crystal. The transition in TONLO parameters is observed due to doping of LT in ZTS. The obtained parameters indicated the superiority of LT-ZTS for application in distinct laser stabilization systems, UV shelter and NLO applications.

scholarly journals Generation of mode-locked square-shaped and chair-like pulse based on reverse saturable absorption effect of nonlinear multimode interference

2019 ◽  
Vol 27 (20) ◽  
pp. 27610 ◽  
Author(s):  
Zhipeng Dong ◽  
Jiaqiang Lin ◽  
Hongxun Li ◽  
Shujie Li ◽  
Runxia Tao ◽  
...  
Keyword(s):  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Multimode Interference ◽  
Absorption Effect

Strong reverse saturable absorption effect of a nonaggregated phthalocyanine-grafted MA–VA polymer

2018 ◽  
Vol 6 (36) ◽  
pp. 9767-9777 ◽  
Author(s):  
Jun Chen ◽  
Yong Xu ◽  
Mihong Cao ◽  
Yafei Wang ◽  
Tongxiang Liang ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Vinyl Acetate ◽  
Nonlinear Absorption ◽  
Optical Limiting ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Absorption Effect ◽  
Grafted Polymer ◽  
Optical Limiting Effect

The amino-substituted phthalocyanines (TA-PcInCl) with high optical limiting effect are grafted onto the copolymer matrix of maleic anhydride (MA) and vinyl acetate (VA), to obtain a novel phthalocyanine grafted polymer (MA–VA-PcInCl) with superior nonlinear absorption effect.

scholarly journals Tunable nonlinear optical responses of few-layer graphene through lithium intercalation

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chenxi Zhang ◽  
Ganying Zeng ◽  
Renyan Zhang ◽  
Yuxiang Tang ◽  
Qirui Liu ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Photon Absorption ◽  
Lithium Intercalation ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Absorption Effect ◽  
Layer Graphene ◽  
Ideal System ◽  
Few Layer Graphene

Abstract Intercalation has been demonstrated to be a powerful tool for tuning the physical and chemical properties of two-dimensional (2D) materials, providing the highest possible doping level and an ideal system to study various electronic states. In this work, we demonstrate that the nonlinear absorption effect of few-layer graphene (about 6–8 layers) is changed from saturable absorption (SA) to reverse saturable absorption (RSA) after lithium intercalation. This is attributed to the increase of Fermi energy owing to the charge transfer from Li to graphene layers in intercalated compounds (LiC6). And the change of nonlinear absorption effect is revisable after deintercalation. In addition, the modulation depth of RSA in lithiated graphene is found to rise with the decrease of incident laser wavelength, different from that of pristine graphene. Besides, the dispersion relationships of degenerate and nondegenerate two-photon absorption are analyzed from the results of nonlinear absorption and transient dynamics of lithiated graphene, indicating the 1.91–2.21 eV upshift of the Fermi surface. Our findings of the intercalation-tunable nonlinear optical absorption effect pave the way for the construction of nonlinear optical devices based on 2D intercalation compounds.

Influence of reverse saturable absorption effect on conventional and dissipative solitons fiber lasers

2021 ◽  
Vol 137 ◽  
pp. 106805
Author(s):  
Gang Wang ◽  
Yuxuan Ma ◽  
Ce Shang ◽  
Haojing Huang ◽  
Zherui Lu ◽  
...  
Keyword(s):  
Fiber Lasers ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Absorption Effect ◽  
Dissipative Solitons

scholarly journals Large Optical Nonlinearity of the Activated Carbon Nanoparticles Prepared by Laser Ablation

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 737
Author(s):  
Yasin Orooji ◽  
Hamed Ghanbari Gol ◽  
Babak Jaleh ◽  
Mohammad Reza Rashidian Vaziri ◽  
Mahtab Eslamipanah
Keyword(s):  
Electron Microscopy ◽  
Activated Carbon ◽  
Laser Ablation ◽  
Carbon Nanoparticles ◽  
Morphological Properties ◽  
Excitation Wavelength ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
High Porosity ◽  
Nlo Properties

Carbon nanoparticles (CNPs) with high porosity and great optical features can be used as a luminescent material. One year later, the same group investigated the NLO properties CNPs and boron-doped CNPs by 532 nm and 1064 nm laser excitations to uncover the underlying physical mechanisms in their NLO response. Hence, a facile approach, laser ablation technique, was employed for carbon nanoparticles (CNPs) synthesis from suspended activated carbon (AC). Morphological properties of the prepared CNPs were studied by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). UV-Vis and fluorescence (FL) spectra were used to optical properties investigation of CNPs. The size distribution of nanoparticles was evaluated using dynamic light scattering (DLS). The nonlinear optical (NLO) coefficients of the synthesized CNPs were determined by the Z-scan method. As a result, strong reverse saturable absorption and self-defocusing effects were observed at the excitation wavelength of 442 nm laser irradiation. These effects were ascribed to the presence of delocalized π-electrons in AC CNPs. To the best of our knowledge, this is the first study investigating the NLO properties of the AC CNPs.

Increasing the triplet lifetime and extending the ground-state absorption of biscyclometalated Ir(iii) complexes for reverse saturable absorption and photodynamic therapy applications

2016 ◽  
Vol 45 (41) ◽  
pp. 16366-16378 ◽  
Author(s):  
Chengzhe Wang ◽  
Levi Lystrom ◽  
Huimin Yin ◽  
Marc Hetu ◽  
Svetlana Kilina ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Ground State ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Ground State Absorption ◽  
Saturable Absorbers ◽  
Triplet Lifetime

Tuning the photophysics of cationic Ir(iii) complexes via π-expansive ligands dramatically impacts their applications as broadband reverse saturable absorbers and in photodynamic therapy and theranostics.

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