Optical Limiting in Fullerene Materials

1997 ◽  
Vol 479 ◽  
Author(s):  
B. Z. Tang ◽  
H. Peng ◽  
S. M. Leung ◽  
N.-T. Yu ◽  
H. Hiraoka ◽  
...  
Keyword(s):  
Sol Gel ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Structure Property ◽  
Limiting Behavior ◽  
Fullerene Derivatives ◽  
Structure Property Relationships ◽  
Gel Glasses ◽  
Physical Blending ◽  
Fullerene Polymers

AbstractFullerene chemistry is booming, but how the chemical reactions affect fullerene's materials properties has seldom been studied. We have investigated optical limiting behavior of a series of fullerene derivatives, polymers, and glasses and have observed the following structure-property relationships for optical limiting in the fullerene materials: (i) The fullerene polymers with aromatic and chlorine moieties, i.e., C60-containing polycarbonate (C60-PC), polystyrene (C60- PS), and poly(vinyl chloride) (C60-PVC), limit the 8-ns pulses of 532-nm laser light more effectively than does the parent C60; (ii) the fullerene polymers with carbonyl groups, i.e., C60- containing CR-39 (C60-CR-39) and poly(methyl methacrylate), (C60-PMMA), do not enhance C60's limiting power; and (iii) the aminated fullerene derivatives, i.e., HxC60 (NHR)x [R = -(CH2CH2O)2H (1), x = 11; -(CH2)6OH (2), x = 7; -cyclo-C6H11 (3), x = 11; -(CH2)3Si(OC2H5)3 (4), x = 4], and their sol-gel glasses, i.e., 1–3/SiO2 (physical blending) and 4-SiO2 (chemical bonding), show complex limiting responses, with 4(-SiO2) performing consistently better than 1-3(/SiO2). The fullerene glasses are optically stable and their optical limiting properties remainunchanged after being subjected to continuous attack by the strong laser pulses for ca. 1 h.

Optical limiting and non linear optical properties of fullerene derivatives embedded in hybrid sol–gel glasses

Carbon ◽  
2000 ◽  
Vol 38 (11-12) ◽  
pp. 1653-1662 ◽  
Author(s):  
Raffaella Signorini ◽  
Moreno Meneghetti ◽  
Renato Bozio ◽  
Michele Maggini ◽  
Gianfranco Scorrano ◽  
...  
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Optical Limiting ◽  
Fullerene Derivatives ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical ◽  
Gel Glasses

scholarly journals Lithium-silicate sol–gel bioactive glass and the effect of lithium precursor on structure–property relationships

2016 ◽  
Vol 81 (1) ◽  
pp. 84-94 ◽  
Author(s):  
Anthony L. B. Maçon ◽  
Manon Jacquemin ◽  
Samuel J. Page ◽  
Siwei Li ◽  
Sergio Bertazzo ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Sol Gel ◽  
Lithium Silicate ◽  
Structure Property ◽  
Structure Property Relationships

scholarly journals Structure—Property Relationships in Sol—Gel-Derived Thin Films

1994 ◽  
pp. 104-121 ◽  
Author(s):  
C. J. Brinker ◽  
N. K. Raman ◽  
M. N. Logan ◽  
R. Sehgal ◽  
R. A. Assink ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Structure Property ◽  
Structure Property Relationships

Structure-Property Relationships for Polyimides Reinforced with the Sol-gel Derived Organosilicon Nanoparticles

2003 ◽  
Vol 11 (3) ◽  
pp. 213-218 ◽  
Author(s):  
V.P. Privalko ◽  
T.A. Shantalii ◽  
I.L. Karpova ◽  
K.S. Dragan ◽  
E.G. Privalko
Keyword(s):  
Sol Gel ◽  
Structure Property ◽  
Structure Property Relationships

scholarly journals Graphene Oxide-Based Silico-Phosphate Composite Films for Optical Limiting of Ultrashort Near-Infrared Laser Pulses

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1638 ◽  
Author(s):  
Adrian Petris ◽  
Ileana Cristina Vasiliu ◽  
Petronela Gheorghe ◽  
Ana Maria Iordache ◽  
Laura Ionel ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Femtosecond Laser ◽  
Near Infrared ◽  
Substrate Surface ◽  
Sol Gel ◽  
Composite Films ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Femtosecond Laser Pulses ◽  
Glassy Matrix

The development of graphene-based materials for optical limiting functionality is an active field of research. Optical limiting for femtosecond laser pulses in the infrared-B (IR-B) (1.4–3 μm) spectral domain has been investigated to a lesser extent than that for nanosecond, picosecond and femtosecond laser pulses at wavelengths up to 1.1 μm. Novel nonlinear optical materials, glassy graphene oxide (GO)-based silico-phosphate composites, were prepared, for the first time to our knowledge, by a convenient and low cost sol-gel method, as described in the paper, using tetraethyl orthosilicate (TEOS), H3PO4 and GO/reduced GO (rGO) as precursors. The characterisation of the GO/rGO silico-phosphate composite films was performed by spectroscopy (Fourier-transform infrared (FTIR), Ultraviolet–Visible-Near Infrared (UV-VIS-NIR) and Raman) and microscopy (atomic force microscopy (AFM) and scanning electron microscopy (SEM)) techniques. H3PO4 was found to reduce the rGO dispersed in the precursor’s solution with the formation of vertically agglomerated rGO sheets, uniformly distributed on the substrate surface. The capability of these novel graphene oxide-based materials for the optical limiting of femtosecond laser pulses at 1550 nm wavelength was demonstrated by intensity-scan experiments. The GO or rGO presence in the film, their concentrations, the composite films glassy matrix, and the film substrate influence the optical limiting performance of these novel materials and are discussed accordingly.

scholarly journals Design, Synthesis, and Structure-Property Relationships of Er3+-Doped TiO2 Luminescent Particles Synthesized by Sol-Gel

Nanomaterials ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 20 ◽  
Author(s):  
Pablo Lopez-Iscoa ◽  
Diego Pugliese ◽  
Nadia Boetti ◽  
Davide Janner ◽  
Giovanni Baldi ◽  
...  
Keyword(s):  
Sol Gel ◽  
Structure Property ◽  
Design Synthesis ◽  
Doped Tio2 ◽  
Structure Property Relationships

Multiphasic Nanostructured Composites for Photonics

1995 ◽  
Vol 413 ◽  
Author(s):  
P. N. Prasad ◽  
R. Gvishi ◽  
G. S. He ◽  
J. D. Bhawalkar ◽  
N. D. Kumar ◽  
...  
Keyword(s):  
Sol Gel ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Functional Requirements ◽  
Limiting Behavior ◽  
Nanostructured Composites ◽  
Two Photon ◽  
Nanostructured Composite ◽  
Multi Wavelength ◽  
Composite Glass

ABSTRACTThe realization of photonics technology rests on the development of multifunctional materials, which simultaneously satisfy many functional requirements. Towards this goal, we present here, the preparation of novel multifunctional nanostructured composites using the sol-gel process. Two specific applications: optical limiting, and two-photon pumped lasing in these composite materials will be discussed.We have been able to dope two optical limiting materials in a single bulk and retain the optical limiting effects at each of their characteristic wavelengths. The materials selected for this purpose were C60 which shows optical limiting behavior at a wavelength of 532 nm and bisbenzothiazole 3,4-didecyloxy thiophene (BBTDOT) which exhibits a strong two-photon absorption induced optical limiting at 800 nm. The resulting glass acts as a multi-wavelength optical limiter.In addition, we present results of two-photon pumped upconverted lasing at 600 nm in a nanostructured composite glass doped with a new dye, trans-4-[P-(N-ethyl-Nhydroxylethylamino) styryl]-N-methylpyridinium tetraphenylborate (ASPT). The pump source was a Q-switched Nd:YAG laser producing 1064 nm pulses of ˜ 10 ns duration.

Probabilistic-topological theory of systems with discrete interactions: I. System representation by a hypergraph

1988 ◽  
Vol 66 (12) ◽  
pp. 1051-1060 ◽  
Author(s):  
Wlodzimierz Klonowski
Keyword(s):  
Structural Characteristics ◽  
Sol Gel ◽  
Membrane Receptors ◽  
Wormlike Micelles ◽  
Translational Symmetry ◽  
Structural Elements ◽  
A Posteriori ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Cellular Aggregates

The theory presented is applicable to any system with discrete interactions, i.e., one that lacks long-range crystal-like translational symmetry but is such that any of its structural elements interacts directly with only a finite (in most cases small) number of other elements, i.e., for materials such as cross-linked polymers, superpolymers (ferrofluids, wormlike micelles, colloidal necklaces), ceramics and glasses obtained by sol-gel processes, as well as for biophysical systems such as membrane receptors, cellular aggregates, neuronal branching patterns.The theory systematizes the information one needs to represent the system by a hypergraph, which then makes possible application of the so-called difference a posteriori (DAPOST) algorithm to calculate structural characteristics of the system and structure–property relationships. It is based on probabilistic and topological considerations; thus, it is applicable to systems far from thermodynamic equilibrium and to the analysis of spatiotemporal patterns.

Optical Limiting Processes in Derivatized Fullerenes and Porphyrins/Phthalocyanines

1997 ◽  
Vol 488 ◽  
Author(s):  
R. Kohlman ◽  
V. Klimov ◽  
X. Shi ◽  
M. Grigorova ◽  
B. R. Mattes ◽  
...  
Keyword(s):  
Spectral Response ◽  
Sol Gel ◽  
Excited State Absorption ◽  
Damage Threshold ◽  
Optical Limiting ◽  
Spectral Studies ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Dynamical Response ◽  
Gel Glasses

AbstractWe review our results from spectral studies of the ultrafast excited-state absorption in fullerenes and derivatized fullerenes. These results allow determination of both the spectral response of reverse saturable absorption (RSA) nonlinearities such as optical limiting (OL) in fullerenes, and the dynamical response for different morphologies. We have investigated the effects of thin film and various sol-gel glass environments on the nanosecond OL and femtosecond dynamics of derivatized fullerenes. These data provide evidence of decay pathways which compete with the intersystem crossing to a triplet from the initial singlet states. With appropriate processing, however, the OL response of derivatized-fullerene sol-gel glasses can be enhanced to approach that of the same molecule in solution, while significantly enhancing the optical damage threshold. The optical limiting of these derivatized fullerenes is compared with that of various porphyrin and phthalocyanine molecules.

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