Nonlinear absorption
Calculation of the Nonlinear Absorption Coefficient of a Strong Electromagnetic Wave by Confined Electrons in Doping Superlatices
... The nonlinear absorption of a strong electromagnetic wave by free electrons in normal bulk semiconductors has been studied by using the quantum kinetic equation method [8] while the linear absorption ...
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The Nonlinear Absorption of a Strong Electromagnetic Waves Caused by Confined Electrons in a Cylindrical Quantum Wire
... and nonlinear optical properties [13, 14], differ from those in bulk semiconductors, as well as two-dimensional systems, and the nonlinear absorption of strong EMW is not an ...The nonlinear ...
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Properties of solutions for a reaction–diffusion equation with nonlinear absorption and nonlinear nonlocal Neumann boundary condition
... The authors discussed the effect of the behavior for the weighted function on the prop- erties of the solution and obtained that p + q ≤ 1, l ≤ 1, then the solutions exist globally for any nonnegative initial data. They ...
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Nonlinear absorption properties of some 1,4,8,11,15,18,22,25 octaalkylphthalocyanines and their metallated derivatives
... large nonlinear absorption coefficients relative to the other ...ground-state absorption coefficients has a far closer link to the linear absorption coefficient than to the type of ...
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Solvent effect on the nonlinear absorption of 5,10 A2B2 meso substituted porphyrins
... state absorption is followed by a two-photon process arising from the higher excited ...positive nonlinear absorption was stronger in toluene than in DMF and ...
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Power Dependent of Nonlinear Absorption Coefficient of CdSe Au Hybrid Nanocomposites
... the nonlinear absorption coefficient of CdSe:Au as a func- tion of particle size as well as concentration elsewhere ...the nonlinear absorption of CdSe:Au hybrid composite of different ...
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Modeling of nonlinear absorption of 5,10 a(2)b(2) porphyrins in the nanosecond regime
... Nonlinear absorption (NLA) can be expressed phenomenally as an increase or decrease in transmission with ...sequential absorption of photons, i.e. reverse saturable absorption (RSA), provided ...
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Laser induced protonation of free base porphyrin in chloroform results in the enhancement of positive nonlinear absorption due to conformational distortion
... the nonlinear absorption (NLA) was carried out with open aperture Z-scan technique [10] with a 6 ns pulsed laser at 532 nm in HPLC grade chloroform and spectroscopic grade ...state absorption studies ...
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Enhanced Nonlinear Absorption Performance of Reduced Graphene Oxide Nanohybrid Covalently Functionalized by Porphyrin via 1,3 Dipolar Cycloaddition
... strong nonlinear absorption over a broad range of the visible spectrum, long lived excited state lifetimes, and its outstanding thermal and photostability and singular physical properties ...
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Intensity Dependent Nonlinear Absorption in Direct and Indirect Band Gap Crystals under Nano and Picosecond Z Scan
... photon absorption coefficients in case of indirect band gap crystals as com- pared to direct band gap crystals have been attributed to phonon assisted ...photon absorption while indirect band gap crystal ...
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The Influences of Confined Phonons on the Nonlinear Absorption Coefficient of a Strong Electromagnetic Wave by Confined Electrons in Doping Superlattices
... the nonlinear absorption coefficient (NAC) by a strong electromagnetic wave for the case of electron-optical phonon scattering in doped superlattices (DSLs) are theoretically studied by using the quantum ...
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Nonlinear optical propagation in a tandem structure comprising nonlinear absorption and scattering materials
... in nonlinear optical (NLO) media is very helpful for the development of photonic devices, such as photonic crystals, optical switches, optical limiters, saturable absorbers, ...strong nonlinear extinction ...
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Broadband ultrafast nonlinear absorption and nonlinear refraction of layered molybdenum dichalcogenide semiconductors
... right aer the sample dispersions to conne the transmitted beam incident on the detector. With the help of the Z-scan, the dispersions were characterized using the laser sources with different wavelength and ...
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Ultralow-threshold up-converted lasing in oligofluorenes with tailored strong nonlinear absorption
... strong nonlinear optical response and high performance optical ...enhanced nonlinear optical response with favorable optical gain ...photon absorption cross-section as high as 2200 GM, which is ...
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Nonlinear absorption properties of 5,10 A2B2 porphyrins correlation of molecular structure with the nonlinear responses
... the absorption arising from the excited states is higher than that arising from the ground ...saturable absorption (SA), takes ...state absorption cross-section to that of the ground ...linear ...
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Growth, NLO, Z scan and impedance studies of glycine potassium sulphate crystals grown by aqueous solution technique
... order nonlinear optical crystals ...order nonlinear optical property of GPS crystal was analyzed by Z-scan experiment and the values of nonlinear absorption coefficient, nonlinear ...
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OPTICAL STUDY ON NANOSIZED EUROPIUM DOPED Sr0.5Ba0.5Nb2O6 CERAMICS
... The open aperture z-scan [18] experiment was used to characterize the nonlinear transmission of the prepared samples. The samples were suspended in ethylene glycol by sonication and were taken in 1 mm cuvettes for ...
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Investigation of non-linear optical properties in 1,2-Diamino-9,10-Anthraquinone (1, 2-DAAQ) by employing Z-scan technique for two concentrations at low input power laser.
... the nonlinear absorption coefficients β, for two concentrations were obtained from the best fit ...of nonlinear absorption coefficient is concentration dependent for 1,2-DAAQ, showing its ...
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Two Photon Absorption in Nanostructure Wide Band Gap Semiconductor CdS Using Femtosecond Laser
... Strong nonlinear absorption in CdS nanoparticles of dimensions in the range 4 - 50 nm when irradiated with a femtosecond pulsed laser at 800 nm is ...the nonlinear absorption coeffi- cients ...
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Self diffraction and nonlinear optical properties for 2, 3- Diaminopyridine under cw illumination
... both nonlinear refraction and nonlinear absorption components, it is necessary to separate the nonlinear absorption components from the nonlinear refraction so as to extract pure ...
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