Photo-physical and nonlinear-optical properties of a new polymer: hydroxylated pyridyl para-phenylene
J. Phys. Chem. B, 107 (40), 11043 -11047, 2003 Photo-physical and nonlinear-optical properties of a new amphiphilic conjugated polymer: hydroxylated pyridyl para-phenylene (Py-PhPPP) both in CH2Cl2 solution and in thin films have been investigated. By using Z-scan technique with nanosecond laser pul...
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09.08.2003
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Abstract | J. Phys. Chem. B, 107 (40), 11043 -11047, 2003 Photo-physical and nonlinear-optical properties of a new amphiphilic
conjugated polymer: hydroxylated pyridyl para-phenylene (Py-PhPPP) both in
CH2Cl2 solution and in thin films have been investigated. By using Z-scan
technique with nanosecond laser pulses of wavelengths ranging from 430 to 600
nm, the large nonlinear absorption and refraction have been determined in terms
of the effective third-order, nonlinear-optical susceptibilities. These Z-scans
reveal that the nonlinear absorption alters from reverse saturable absorption
to saturable absorption at wavelength of ~ 540 nm. Similarly, alteration from
self-defocusing to self-focusing manifests itself at the same wavelength. The
optical limiting performance of Py-PhPPP in solution is superior to toluene
solution of [60]fullerene (C60) at 532 nm. Both UV-visible absorption spectra
and photoluminescence (PL) spectra show concentration dependence. The PL
spectra also depend on excitation wavelengths. These evidences suggest that the
aggregate formation should play an important role in the nonlinear-optical
properties of the new polymer. We attribute the reverse saturable absorption in
the region of blue and green wavelengths mainly to intra-chain, triplet-triplet
absorption while the absorption bleaching at longer wavelengths is due to
saturation in the absorption band induced by the aggregates. |
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AbstractList | J. Phys. Chem. B, 107 (40), 11043 -11047, 2003 Photo-physical and nonlinear-optical properties of a new amphiphilic
conjugated polymer: hydroxylated pyridyl para-phenylene (Py-PhPPP) both in
CH2Cl2 solution and in thin films have been investigated. By using Z-scan
technique with nanosecond laser pulses of wavelengths ranging from 430 to 600
nm, the large nonlinear absorption and refraction have been determined in terms
of the effective third-order, nonlinear-optical susceptibilities. These Z-scans
reveal that the nonlinear absorption alters from reverse saturable absorption
to saturable absorption at wavelength of ~ 540 nm. Similarly, alteration from
self-defocusing to self-focusing manifests itself at the same wavelength. The
optical limiting performance of Py-PhPPP in solution is superior to toluene
solution of [60]fullerene (C60) at 532 nm. Both UV-visible absorption spectra
and photoluminescence (PL) spectra show concentration dependence. The PL
spectra also depend on excitation wavelengths. These evidences suggest that the
aggregate formation should play an important role in the nonlinear-optical
properties of the new polymer. We attribute the reverse saturable absorption in
the region of blue and green wavelengths mainly to intra-chain, triplet-triplet
absorption while the absorption bleaching at longer wavelengths is due to
saturation in the absorption band induced by the aggregates. |
Author | Baskar, C Knoll, W Valiyaveettil, S Ji, W He, Jun Elim, Hendry Izaac Fitrilawati, F |
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BackLink | https://doi.org/10.48550/arXiv.cond-mat/0308183$$DView paper in arXiv |
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Snippet | J. Phys. Chem. B, 107 (40), 11043 -11047, 2003 Photo-physical and nonlinear-optical properties of a new amphiphilic
conjugated polymer: hydroxylated pyridyl... |
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SubjectTerms | Physics - Atomic and Molecular Clusters Physics - Chemical Physics Physics - Materials Science Physics - Optics |
Title | Photo-physical and nonlinear-optical properties of a new polymer: hydroxylated pyridyl para-phenylene |
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