2014
DOI: 10.1016/j.optlastec.2013.11.022
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The nonlinear absorption and optical limiting in phenoxy-phthalocyanines liquid in nano- and femto-second regime: Experimental studies

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Cited by 45 publications
(17 citation statements)
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“…A standard Z ‐scan analysis is done by moving the sample back‐and‐forth from the focal point of the pulsed laser beam along its optical axis (defined as the z ‐axis) via a continuously tunable optical attenuator plate. Under the assumption that the laser beam intensity follows an ideal Gaussian profile, the normalized open‐aperture Z ‐scan transmittance can be given byTTPA=[]1+n1αnLnormaleffInormal0/(1+znormal/z02)n11/n1, Leff=1eαLαin which α n denotes the effective multiphoton absorption coefficient, L eff is the effective length of the sample, α is the linear absorption coefficient, L is the actual length of the sample, I 0 is the laser intensity, and z 0 is the diffraction length of the laser beam (also known as the Rayleigh length). Using Equation to fit the Z ‐scan experimental data shown in Figure , we numerically calculated the effective TPA coefficient (α 2 ) as 8.5 cm GW −1 for the single crystal MAPbBr 3 at 1044 nm excitation by numerous experimental attempts, which is significantly higher than other well‐known semiconductors that feature TPA at similar wavelengths, such as CdTe (0.02 cm GW −1 at 1300 nm) and GaSe (≈6.3 cm GW −1 at 1060 nm) .…”
Section: Resultsmentioning
confidence: 99%
“…A standard Z ‐scan analysis is done by moving the sample back‐and‐forth from the focal point of the pulsed laser beam along its optical axis (defined as the z ‐axis) via a continuously tunable optical attenuator plate. Under the assumption that the laser beam intensity follows an ideal Gaussian profile, the normalized open‐aperture Z ‐scan transmittance can be given byTTPA=[]1+n1αnLnormaleffInormal0/(1+znormal/z02)n11/n1, Leff=1eαLαin which α n denotes the effective multiphoton absorption coefficient, L eff is the effective length of the sample, α is the linear absorption coefficient, L is the actual length of the sample, I 0 is the laser intensity, and z 0 is the diffraction length of the laser beam (also known as the Rayleigh length). Using Equation to fit the Z ‐scan experimental data shown in Figure , we numerically calculated the effective TPA coefficient (α 2 ) as 8.5 cm GW −1 for the single crystal MAPbBr 3 at 1044 nm excitation by numerous experimental attempts, which is significantly higher than other well‐known semiconductors that feature TPA at similar wavelengths, such as CdTe (0.02 cm GW −1 at 1300 nm) and GaSe (≈6.3 cm GW −1 at 1060 nm) .…”
Section: Resultsmentioning
confidence: 99%
“…Recently, organometallic complexes have attracted attention as promising third-order NLO materials [10][11][12][13]. These materials, which contain transition metal-ions, exhibit new properties due to the richness of the various excited states presented in the system and the ability to tailor the metal-organic ligand interactions.…”
Section: -Introductionmentioning
confidence: 99%
“…At this point the intense light would result in triplet-triplet absorption (T 1 ® T n ) making Pcs excellent optical limiters. 9,10 It is recognized that the asymmetrical electronic structure of Pcs induced by the introduction and variation of peripheral substituents enhances NLO properties. When peripheral substituents are considered, a condensation reaction with a single phthalonitrile precursor can result in four constitutional isomers with C s , C 2v , C 4h and D 2h symmetries.…”
Section: Introductionmentioning
confidence: 99%