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Third-order nonlinear optical properties of highly electron deficient, nonplanar push-pull porphyrins: β-nitro-hexa-substituted porphyrins bearing bromo, phenyl, and phenylethynyl groups.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 4/14/2024, Vol. 53 Issue 14, p6436-6444, 9p
- Publication Year :
- 2024
-
Abstract
- β-Heptasubstituted porphyrins [MTPP(NO<subscript>2</subscript>)X<subscript>6</subscript>; M = 2H, Ni<superscript>II</superscript>, Cu<superscript>II</superscript>, and Zn<superscript>II</superscript>; X = Br, Ph, and PE] were synthesized and their third-order nonlinear optical (NLO) properties explored using the single-beam Z-scan technique with femtosecond, MHz pulses in the visible range. The three-photon absorption (γ), thirdorder nonlinear optical susceptibility (χ³), three-photon absorption cross-section (σ<subscript>3</subscript>), and nonlinear refractive index (n2) have been determined from theoretical fits with experimental results. The sign and magnitude of the nonlinear refractive index (n<subscript>2</subscript>) have been obtained from the closed-aperture experiment while the three-photon absorption coefficient and three-photon absorption cross-section were determined from the open-aperture experiment. The magnitudes of the 3PA and σ<subscript>3</subscript> extended in the range of (2.7-3.4) × 10<superscript>-23</superscript> cm³ W<superscript>-2</superscript> and (5.5-7.0) × 10<superscript>-78</superscript> cm<superscript>6</superscript> s², respectively. The higher magnitude of the NLO coefficients ensures their utility in optical and photonic applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 53
- Issue :
- 14
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 176524756
- Full Text :
- https://doi.org/10.1039/d4dt00045e