Laser induced protonation of free base porphyrin in chloroform results in the enhancement of positive nonlinear absorption due to conformational distortion

Free base porphyrin in chloroform solution irradiated with focused laser beam, in an open Z-scan set-up, changed color from purple to green, which was associated with protonation of the porphyrin with protonic species from photodegradation of the solvent. Protonation is demonstrated as a simple means to improve the optical limiting performance of free base porphyrin nonlinear optical (NLO) materials.

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Nonlinear optical properties of polyphthalocyanine porous organic frameworks

New Journal of Chemistry ◽

10.1039/d0nj03728a ◽

2020 ◽

Vol 44 (36) ◽

pp. 15345-15349

Author(s):

Tingfeng Wang ◽

Tao Sun ◽

Wei Tang ◽

Wenbo Huang ◽

Wenxiang Zhang ◽

...

Keyword(s):

Optical Properties ◽

Nonlinear Absorption ◽

Nonlinear Optical ◽

Optical Limiting ◽

Nonlinear Optical Properties

sp3-hybridized carbon bridge polyphthalocyanine porous organic frameworks can enhance nonlinear absorption and optical limiting properties.

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NONLINEAR-OPTICAL AND OPTICAL LIMITING PROPERTIES OF PHENOXY-PHTHALOCYANINES STUDIED USING THE Z-SCAN TECHNIQUE

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863509004907 ◽

2009 ◽

Vol 18 (04) ◽

pp. 583-589 ◽

Cited By ~ 13

Author(s):

YUNDONG ZHANG ◽

LEI MA ◽

CHAOBO YANG ◽

PING YUAN

Keyword(s):

Absorption Coefficient ◽

Low Power ◽

Pulse Laser ◽

Nonlinear Absorption ◽

Nonlinear Optical ◽

Optical Limiting ◽

Nonlinear Absorption Coefficient ◽

Potential Candidate ◽

Single Beam ◽

532 Nm

The nonlinear-optical and optical limiting properties of 2(3), 9(10), 16(17), 23(24) phenoxy-phthalocyanines have been investigated using a 10-ns-pulse laser at 532 nm. The nonlinear absorption coefficient (β) is measured by the single beam Z-scan technique. We have observed low power optical limiting, with low limiting thresholds, based on nonlinear absorption in the sample. These studies indicate that the phthalocyanine material is a potential candidate for low power optical limiting applications.

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THIRD-ORDER NONLINEAR OPTICAL PROPERTIES OF [(C2H5)4N][Co(dmit)2] USING Z-SCAN TECHNIQUE

Modern Physics Letters B ◽

10.1142/s0217984908014651 ◽

2008 ◽

Vol 22 (03) ◽

pp. 191-198 ◽

Cited By ~ 3

Author(s):

XI ZHANG ◽

QUAN REN ◽

WEN-FENG GUO ◽

XIANG-BING SUN ◽

XIN-QIANG WANG ◽

...

Keyword(s):

Optical Properties ◽

Absorption Coefficient ◽

Nonlinear Absorption ◽

Nonlinear Optical ◽

Nonlinear Refraction ◽

Optical Limiting ◽

Optical Nonlinearities ◽

Refraction Coefficient ◽

Third Order ◽

Potential Applications

A novel dmit 2- complex: [( C 2 H 5)4 N][Co(dmit) 2], abbreviated as EtCo , was synthesized and its third-order optical nonlinearities were characterized by Z-scan technique at the wavelength of 1064 nm with laser duration of 40 ps. Z-scan curves revealed a negative nonlinear refraction at 1064 nm and a positive absorption was observed. The nonlinear refraction coefficient n2, the nonlinear absorption coefficient β and the molecular second hyperpolarizability γ have been determined to be as large as 9.51×10-19 m 2/ W , 2.19×10-12 m/W and 5.41×10-31 esu respectively, suggesting that this material has potential applications in optical limiting.

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Nonlinear Fiber Core Liquid and Nematic Liquid Crystal Film for Wide Temporal Bandwidth Optical Limiting Application

MRS Proceedings ◽

10.1557/proc-597-281 ◽

1999 ◽

Vol 597 ◽

Cited By ~ 1

Author(s):

I. C. Khoo

Keyword(s):

Liquid Crystal ◽

Liquid Crystals ◽

Optical Fiber ◽

Nonlinear Absorption ◽

Nonlinear Optical ◽

Optical Limiting ◽

Optical Nonlinearity ◽

Fiber Core ◽

Crystal Film ◽

Nonlinear Fiber

AbstractNonlinear absorption processes in an extremely nonlinear optical fiber core liquid, and recently observed supra-optical-nonlinearity in dopant modified nematic liquid crystals, are discussed in the context of optical limiting and anti-laser dazzling application.

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INTENSITY DEPENDENT NONLINEAR MATERIAL REQUIREMENTS FOR PASSIVE OPTICAL LIMITING

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218199193000309 ◽

1993 ◽

Vol 02 (04) ◽

pp. 503-519 ◽

Cited By ~ 1

Author(s):

G.L. WOOD ◽

E.J. SHARP

Keyword(s):

Optical System ◽

Nonlinear Optical ◽

Optical Limiting ◽

Nonlinear Material ◽

Radiation Level ◽

Index Change ◽

Absorption Change ◽

Material Parameters ◽

Nlo Materials ◽

Laser Induced Damage

Passive optical limiting devices based on nonlinear optical (NLO) materials exhibit a throughput radiation level that is related to the magnitude of the nonlinear material parameters. We model both optically ‘thick’ and optically ‘thin’ limiters based on intensity dependent, χ(3) nonlinearities and predict the magnitude of the nonlinearities required to provide protection for the human eye from laser induced damage for a specific optical system. These calculated nonlinearities are given in terms of a required index change, n2, or absorption change, β.

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New supramolecular compounds based on porphyrin and polyoxometalate: synthesis, characterization and nonlinear optical and optical limiting properties

RSC Advances ◽

10.1039/c4ra09384d ◽

2014 ◽

Vol 4 (91) ◽

pp. 50277-50284 ◽

Cited By ~ 24

Author(s):

Zonghai Shi ◽

Yunshan Zhou ◽

Lijuan Zhang ◽

Cuncun Mu ◽

Haizhou Ren ◽

...

Keyword(s):

Nonlinear Absorption ◽

Nonlinear Optical ◽

Optical Limiting ◽

Supramolecular Compounds

Compounds composed of [SW12−nVnO40](2+n)− and [H2TPP]2+ show significant nonlinear absorption, self-defocusing behavior and excellent optical limiting performance.

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Laboratory Measurements of Light Scattering by Dust Particles

International Astronomical Union Colloquium ◽

10.1017/s0252921100501948 ◽

1996 ◽

Vol 150 ◽

pp. 409-413

Author(s):

Patrick P. Combet ◽

Philippe L. Lamy

Keyword(s):

Light Scattering ◽

Laser Beam ◽

Mie Theory ◽

Spherical Particles ◽

Dust Particles ◽

Laboratory Measurements ◽

Scattering Function ◽

Hene Laser ◽

Set Up ◽

Good Agreement

AbstractWe have set up an experimental device to optically study the scattering properties of dust particles. Measurements over the 8 — 174° interval of scattering angles are performed on a continuously flowing dust loaded jet illuminated by a polarized red HeNe laser beam. The scattering is averaged over the population of the dust particles in the jet, which can be determined independently, and give the “volume scattering function” for the two directions of polarization directly. While results for spherical particles are in good agreement with Mie theory, those for arbitrary particles show conspicuous deviations.

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