Photophysical and nonlinear optical study of benzothiazole substituted phthalocyanines in solution and thin films

2017 ◽  
Vol 21 (04-06) ◽  
pp. 263-272 ◽  
Author(s):  
Njemuwa Nwaji ◽  
Owolabi M. Bankole ◽  
Jonathan Britton ◽  
Tebello Nyokong
Keyword(s):  
Thin Films ◽  
Nonlinear Optical ◽  
Laser Excitation ◽  
Optical Limiting ◽  
Optical Study ◽  
Optical Performance ◽  
Third Order ◽  
Limiting Behavior ◽  
532 Nm ◽  
Order Susceptibility

In this study, the photophysical, nonlinear absorption and nonlinear optical limiting properties of zinc and gallium phthalocyanine complexes: tetrakis[(benzo[d]thiazol-2-yl phenoxy)phthalocyaninato]zinc(II) (3), tetrakis[(benzo[d]thiazol-2-yl phenoxy)phthalocyaninato] gallium(III) chloride (4), tetrakis[(benzo[d]thiazol-2-ylthio)phthalocyaninato] zinc(II) (5), tetrakis[(benzo[d]thiazol-2-ylthio)phthalocyaninato] gallium(III) chloride (6), were investigated both in solution and when embedded in polystyrene thin films using 532 nm laser excitation at 10 ns pulses. It was also observed that complexes that have higher triplet state absorption also possessed enhanced nonlinear and optical limiting behavior. Superior optical performance was observed when the complexes were embedded in thin films compared to when they are in solution. Complex 6 in thin films gave the highest imaginary third-order susceptibility (I[Formula: see text][X[Formula: see text]]) and hyperpolarizability ([Formula: see text] at 4.61 × 10[Formula: see text] esu and 3.44 × 10[Formula: see text] esu, respectively, with a low I[Formula: see text] value of 0.06 J.cm[Formula: see text]

Optical limiting properties of BODIPY dyes substituted with styryl or vinylene groups on the nanosecond timescale

2019 ◽  
Vol 23 (07n08) ◽  
pp. 701-717 ◽  
Author(s):  
Nobuhle Ndebele ◽  
Zweli Hlatshwayo ◽  
Bokolombe P. Ngoy ◽  
Gugu Kubheka ◽  
John Mack ◽  
...  
Keyword(s):  
Thin Films ◽  
Absorption Coefficient ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Nanosecond Laser ◽  
Third Order ◽  
The Third ◽  
Nanosecond Laser Pulses ◽  
532 Nm ◽  
Order Susceptibility

The results of recent studies on the optical limiting properties of BODIPY dyes at 532 and 1064 nm are described and compared. The optical limiting properties of novel 1,7-dimethyl-3,5-di-4-dihydroxyborylstyryl- and 3,5,7-tristyryl-1-methyl-BODIPY dyes were studied in CH2Cl2 and C6H6 and polystyrene thin films using the open aperture Z-scan technique at 532 nm with nanosecond laser pulses to provide an example of how the effective nonlinear absorption coefficient, the third order susceptibility, hyperpolarizability and limiting thresholds can be calculated.

Optical limiting behavior of ring substituted zinc, indium and gallium phthalocyanines in the presence of quantum dots

2011 ◽  
Vol 15 (11n12) ◽  
pp. 1239-1249 ◽  
Author(s):  
Jonathan Britton ◽  
Christian Litwinski ◽  
Mahmut Durmuş ◽  
Vongani Chauke ◽  
Tebello Nyokong
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Optical Limiting ◽  
Amino Groups ◽  
Third Order ◽  
Limiting Behavior ◽  
General Improvement ◽  
Limiting Parameters ◽  
Future Work ◽  
Order Susceptibility

This paper presents the study of the effects of CdTe-TGA quantum dots (QDs) on optical limiting ability of different phthalocyanine (Pc) complexes (1–10) containing Zn , Ga , In central metals and substituted with benzyloxyphenoxy, phenoxy, tert-butylphenoxy and amino groups. The optical limiting parameters of Pcs were higher for tert-butylphenoxy when compared to benzyloxyphenoxy and phenoxy substituents, in DMSO. Non-peripheral substitution decreased the optical limiting parameters. Third-order susceptibility (Im[χ(3)]/α) values of Pcs in the absence and presence of CdTe QDs were in the 10-12 to 10-10 esu.cm range. Hyperpolarizabilities (γ) ranged from 10-31 to 10-29 esu L for Pc alone or in mixture with QDs. There is a general improvement in optical limiting ability of Pc complexes in the presence of CdTe TGA QDs. Due to these promising results, future work can be implemented for the creation of Pc:QD thin films, which would then be examined to ensure that their optical limiting ability is still acceptable.

Nonlinear optical properties of colloidal carbon nanoparticles: nanodiamonds and carbon dots

RSC Advances ◽  
2014 ◽  
Vol 4 (76) ◽  
pp. 40152-40160 ◽  
Author(s):  
Irene Papagiannouli ◽  
Athanasios B. Bourlinos ◽  
Aristides Bakandritsos ◽  
Stelios Couris
Keyword(s):  
Optical Properties ◽  
Carbon Dots ◽  
Carbon Nanoparticles ◽  
Nonlinear Optical ◽  
Laser Excitation ◽  
Optical Limiting ◽  
Nonlinear Optical Properties ◽  
Nlo Response ◽  
Colloidal Carbon ◽  
532 Nm

Nanodiamonds (NDs) and carbon-dots (CDs) suspensions exhibit significant NLO response under both ps and ns laser excitation. NDs exhibit important optical limiting action under nanosecond visible (532 nm) and infrared (1064 nm) laser excitation.

THIRD-ORDER NONLINEARITIES AND OPTICAL LIMITING OF C60 POLYURETHANE–UREA FILMS

2004 ◽  
Vol 13 (01) ◽  
pp. 45-54 ◽  
Author(s):  
SHENG-LI GUO ◽  
BING GU ◽  
TAO ZHANG
Keyword(s):  
Excited State Absorption ◽  
Optical Limiting ◽  
Homogeneous Material ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Third Order ◽  
Limiting Behavior ◽  
Nonlinear Optical Absorption ◽  
The Difference ◽  
532 Nm

We report on the measurement of the nonlinear optical absorption and refraction coefficients of C60-containing polyurethane–urea films on a nanosecond scale at a 532-nm wavelength, using the Z-scan technique. The optical limiting properties were also observed. The results show that the C60 polyurethane–urea is a kind of homogeneous material with a range of C60 content. With the difference in C60 content in polymers, the optical limiting properties are many and the required transmittance and transmitted energy can be altered depending on the C60 content in polymers. We suggest that the third-order nonlinearities and optical limiting behavior are consistent with excited-state absorption (reverse saturable absorption) as a mechanism.

Facile fabrication of wafer-scale MoS2 neat films with enhanced third-order nonlinear optical performance

Nanoscale ◽  
2015 ◽  
Vol 7 (7) ◽  
pp. 2978-2986 ◽  
Author(s):  
Xiaoyan Zhang ◽  
Saifeng Zhang ◽  
Chunxia Chang ◽  
Yanyan Feng ◽  
Yuanxin Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Nonlinear Optical ◽  
Saturable Absorption ◽  
Optical Performance ◽  
Third Order ◽  
Wafer Scale ◽  
Facile Fabrication ◽  
Absorption Performance ◽  
Neat Films

Wafer-scale neat MoS2 optical thin films were fabricated successfully, and they show a superior broadband ultrafast saturable absorption performance.

Nonlinear optical and optical limiting response of PLD nc-Si thin films

2017 ◽  
Vol 5 (46) ◽  
pp. 12211-12220 ◽  
Author(s):  
Partha P. Dey ◽  
Alika Khare
Keyword(s):  
Thin Films ◽  
Deposition Temperature ◽  
Nonlinear Optical ◽  
Optical Limiting ◽  
Temperature Dependent ◽  
Limiting Behavior ◽  
Si Films

PLD nc-Si films exhibited deposition temperature-dependent large RSA and positive NLR (χ(3) ∼ 10−1 esu) and optical limiting behavior.

Third-Order Nonlinear Optical Properties of InN Thin Films Under 532 nm Nanosecond Laser Pulses

2017 ◽  
Vol 17 (2) ◽  
pp. 1460-1463
Author(s):  
Jin-Ying Wang ◽  
Zhe-Ming Jin ◽  
Ke-Xin Sun ◽  
Jin-Ding Sun ◽  
Cheng-Bao Yao ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Laser Pulses ◽  
Nonlinear Optical Properties ◽  
Nanosecond Laser ◽  
Third Order ◽  
Nanosecond Laser Pulses ◽  
532 Nm

Nonlinear Optical Studies on a New Poly{2-(biphenyl-4-yl)-5-[3,4-didecyloxy-5-(1,3,4-oxadiazol-2-yl)thiophen-2-yl]-1,3,4-oxadiazole}

2010 ◽  
Vol 657 ◽  
pp. 56-61 ◽  
Author(s):  
Pramod Kumar Hegde ◽  
Airody Vasudeva Adhikari ◽  
M.G. Manjunatha ◽  
C.S. Suchand Sandeep ◽  
Philip Reji
Keyword(s):  
Nonlinear Optical ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Excitation Wavelength ◽  
Optical Studies ◽  
Limiting Behavior ◽  
Single Beam ◽  
Transmission Measurements ◽  
Best Fit ◽  
532 Nm

Measurements of nonlinear optical properties of a newly synthesized thiophene based polymer are reported. The nonlinear transmission measurements were performed on the polymer dissolved in N,N-dimethylformamide by employing the single beam Z-scan technique using a Q-switched laser output at 532-nm. The polymer shows strong optical limiting behavior, where the transmittance decreases when the pump fluence is increased. It was found that an effective three-photon absorption (3PA) model at the excitation wavelength gives the best fit to the obtained experimental data. The value of the 3PA coefficient has been numerically calculated. This study clearly reveals the potential of new polymeric material has, for optical limiting applications.

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