The Optical Nonlinear Properties of Different Particles Size of Ferrofluid

2018 ◽  
Vol 54 ◽  
pp. 15-21
Author(s):  
Rabi Noori Hammudi ◽  
Sudad Salman Al-Bassam ◽  
Aseel Ibrahim Mahmood ◽  
Rawa Khalil Ibrahim ◽  
Peter Kopčanský
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Nonlinear Refractive Index ◽  
Nonlinear Coefficient ◽  
Nano Particle ◽  
Nonlinear Properties ◽  
Water Based ◽  
Linear Optical Properties ◽  
The Difference ◽  
Different Diameters

In this work, the non-linear optical properties (nonlinear refractive index , nonlinear absorption coefficient ) for different samples of water based Ferrofluids have been presented and studied by aid of z-scan technique. These liquids have different diameters of nano-particle suspensions. The difference in diameter leads to higher absorption ; bigger radius leads to higher nonlinear coefficient and nonlinear refractive index.

scholarly journals Spectral and Nonlinear Properties of Coconut Oil

2021 ◽  
Vol 2114 (1) ◽  
pp. 012035
Author(s):  
K. Rajaa Nader
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Spectral Properties ◽  
Coconut Oil ◽  
Closed Aperture ◽  
Living Tissue ◽  
Nonlinear Properties ◽  
Non Linear ◽  
Linear Optical Properties

Abstract In this research, the spectral properties of Absorption and Fluorescence of synthetic coconut oil (Local made) have been studied. It was found that the efficiency of coconut oil equal to (3.276%). In addition, non-linear optical properties represented by the refractive index (n2) and absorption coefficient(β) have been calculatal using three –dimensioual scanning technigue (z-scan and Helium Neom laser. Refractive inex (n2=4.231×10-7 cm2/mW) and absorption coefficient (β= 0.72373 cm/mW) have been measured from Closed-aperture part and Open-aperture part, respectively. Coconut oil has non-linear properties, where it can be utilize in nonlinear spectral applications, especially in the study the living tissue through its application and its treatment with laser.

Nonlinear Refractive Index of Silicon Nanoparticles: A Short Review

2014 ◽  
Vol 1 (2) ◽  
pp. 87-97
Author(s):  
Sudakshina Prusty
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Phase Modulation ◽  
Silicon Nanoparticles ◽  
Nonlinear Coefficient ◽  
Short Review ◽  
Self Phase Modulation ◽  
Physical Mechanisms ◽  
Self Focusing ◽  
Physical Phenomena

This article discusses the nonlinear refractive index of silicon nanoparticles starting from the basic formalism to some of the consequent physical phenomena like self focusing and self phase modulation. Several experimental techniques mainly based on Z-scan are discussed to measure the nonlinear refractive index. Another less explored technique for silicon nanoparticles, which studies the far-field optical fringe pattern formed by spatial self-phase modulation, is also discussed. Computation of the nonlinear refractive index is shown in detail by employing these two techniques. While Z-scan can estimate the nonlinear coefficient of a medium in a chosen time scale, the optical fringe method can predict the overall nonlinear refractive index due to all possible physical mechanisms. Some of the recent results for silicon nanoparticles using these two techniques are also discussed.

scholarly journals Fused ring effect on optical nonlinearity and structure property relationship of anthracenyl chalcone based push-pull chromophores

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257808
Author(s):  
Dian Alwani Zainuri ◽  
Mundzir Abdullah ◽  
Muhamad Fikri Zaini ◽  
Hazri Bakhtiar ◽  
Suhana Arshad ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Electrostatic Potential ◽  
Nonlinear Refractive Index ◽  
Optical Switching ◽  
Nonlinear Optical ◽  
Continuous Wave ◽  
Excited State Absorption ◽  
Nonlinear Optical Properties ◽  
Closed Aperture

The Ultraviolet-visible (UV-Vis) spectra indicate that anthracenyl chalcones (ACs) have high maximum wavelengths and good transparency windows for optical applications and are suitable for optoelectronic applications owing to their HOMO–LUMO energy gaps (2.93 and 2.76 eV). Different donor substituents on the AC affect their dipole moments and nonlinear optical (NLO) responses. The positive, negative, and neutral electrostatic potential regions of the molecules were identified using molecular electrostatic potential (MEP). The stability of the molecule on account of hyperconjugative interactions and accompanying charge delocalization was analyzed using natural bond orbital (NBO) analysis. Open and closed aperture Z-scans were performed using a continuous-wave frequency-doubled diode-pumped solid-state (DPSS) laser to measure the nonlinear absorption and nonlinear refractive index coefficients, respectively. The valley-to-peak profile of AC indicated a negative nonlinear refractive index coefficient. The obtained single crystals possess reverse saturation absorption due to excited-state absorption. The structural and nonlinear optical properties of the molecules have been discussed, along with the role of anthracene substitution for enhancing the nonlinear optical properties. The calculated third-order susceptibility value was 1.10 x10-4 esu at an intensity of 4.1 kW/cm2, higher than the reported values for related chalcone derivatives. The NLO response for both ACs offers excellent potential in optical switching and limiting applications.

The Mechanical and Optical Properties of Injection-moulded PMMA, Filled with Glass Particles of a Matching Refractive Index

2017 ◽  
Vol 25 (6) ◽  
pp. 453-462 ◽  
Author(s):  
Wolfgang Wildner ◽  
Dietmar Drummer
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Injection Moulding ◽  
Surface Defects ◽  
Elongation At Break ◽  
Filling Degree ◽  
Moulding Process ◽  
Injection Moulding Process ◽  
The Difference ◽  
Optical And Mechanical Properties

In this paper, the optical and mechanical properties of injection-moulded plates (thickness: 1 mm) made of poly(methyl methacrylate) (PMMA) and glass particles as filler with a matching refractive index are investigated. Tests show that the orientation resulting from the injection moulding process greatly affects the tensile strength and elongation at break, whereas the elastic modulus merely depends on the filling degree, which is investigated up to 13 vol.%. In terms of the optical properties, the specimens’ haze depends on the difference in the refractive index between a glass and polymer. However, the absolute value of haze increases with increasing filling degree and decreasing particle size. Surface defects resulting from the injection moulding process were found to be the primary reason for this haze, even with identical RI between PMMA and glass.

scholarly journals Linear and nonlinear optical properties of hybrid metallic–dielectric plasmonic nanoantennas

2016 ◽  
Vol 7 ◽  
pp. 111-120 ◽  
Author(s):  
Mario Hentschel ◽  
Bernd Metzger ◽  
Bastian Knabe ◽  
Karsten Buse ◽  
Harald Giessen
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Response ◽  
High Efficiency ◽  
Dielectric Materials ◽  
Nonlinear Optical Properties ◽  
Linear Optical Properties ◽  
Linear And Nonlinear ◽  
Linear Optical

We study the linear and nonlinear optical properties of hybrid metallic–dielectric plasmonic gap nanoantennas. Using a two-step-aligned electron beam lithography process, we demonstrate the ability to selectively and reproducibly fill the gap region of nanoantennas with dielectric nanoparticles made of lithium niobate (LiNbO3) with high efficiency. The linear optical properties of the antennas are modified due to the large refractive index of the material. This leads to a change in the coupling strength as well as an increase of the effective refractive index of the surrounding. The combination of these two effects causes a red- or blue-shift of the plasmonic modes, respectively. We find that the nonlinear optical properties of the combined system are only modified in the range of one order of magnitude. The observed changes in our experiments in the nonlinear emission can be traced to the changed dielectric environment and thus the modified linear optical properties. The intrinsic nonlinearity of the dielectric used is in fact small when compared to the nonlinearity of the metallic part of the hybrid antennas. Thus, the nonlinear signals generated by the antenna itself are dominant in our experiments. We demonstrate that the well-known nonlinear response of bulk dielectric materials cannot always straightforwardly be used to boost the nonlinear response of nanoscale antenna systems. Our results significantly deepen the understanding of these interesting hybrid systems and offer important guidelines for the design of nanoscale, nonlinear light sources.

scholarly journals Studying the Nonlinear Optical Properties of Fluoride Laser Host Materials in the Ultraviolet Wavelength Region

2021 ◽  
Vol 12 (1) ◽  
pp. 372
Author(s):  
Duong Van Pham ◽  
Diep Van Nguyen ◽  
Tu Xuan Nguyen ◽  
Kieu Anh Thi Doan ◽  
Quan Minh Le ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Ultrashort Pulse ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Wavelength Region ◽  
Aluminum Fluoride ◽  
Self Focusing ◽  
Host Materials ◽  
Ultraviolet Wavelength

Fluoride host materials doped with trivalent cerium ions have previously been demonstrated as successful laser materials in the ultraviolet wavelength region. However, the nonlinear optical properties of the fluoride hosts in this wavelength region have not been investigated yet, although nonlinearity could result in undesirable effects such as self-focusing and pulse distortion when these fluoride materials are used as gain media in high-power, ultrashort pulse laser oscillator and amplifier systems. In this work, the nonlinear refractive index of lithium calcium aluminum fluoride (LiCaAlF6), lithium strontium aluminum fluoride (LiSrAlF6), lanthanum fluoride (LaF3), and yttrium lithium fluoride (YLiF4) fluoride host materials are determined using the Kramers–Krönig relation model in the ultraviolet wavelength region. Self-focusing conditions, particularly at the peak laser emission wavelength of these materials, are further analyzed. Results show that LiCaAlF6 has the smallest nonlinear refractive index and self-focusing, making it an ideal host material under the conditions of ultrashort pulse and ultrahigh-power laser generation.

Third-order optical nonlinearity of DSR13/THF solutions under CW He–Ne laser irradiation using Z-scan method

2021 ◽  
pp. 1-7
Author(s):  
Bassam Abbas ◽  
Mohammad Alshikh Khalil
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Third Order ◽  
The Third ◽  
Order Susceptibility

The Z-scan technique was employed to explore the third-order nonlinear optical properties of disperse red 13 organic chromophore solutions in tetrahydrofuran. A continuous-wave He–Ne laser (632.8 nm) was used as a source of irradiation. The nonlinear absorption and nonlinear refractive index coefficients of this dye were investigated. The results showed that this dye has a good nonlinear response with its real and imaginary quantities of third-order susceptibility. The solutions showed negative nonlinear refraction. The best obtained value of the third-order susceptibility was 6.37 × 10–3 esu at a dye concentration of 3.15 × 10–4 mol/L. Moreover, the nonlinear optical properties were enhanced with higher dye concentrations, and an elevated trend in nonlinear absorption and nonlinear refractive index coefficients was observed. Also, it was found that the reverse saturable absorption was the main mechanism responsible for the two-photon absorption effect in DSR13/THF samples.

scholarly journals Second-order hyperpolarizability, Figure of merit and nonlinear optical properties of novel organic compound doped conducting polymer film

2021 ◽  
Author(s):  
Hussain Ali Badran ◽  
Hanan A. Al-Hazam ◽  
Raeed K. Alfahed ◽  
Khalid I. Ajeel
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Organic Compound ◽  
Polymer Film ◽  
Conducting Polymer ◽  
Nonlinear Refractive Index ◽  
Figure Of Merit ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Dispersion Energy

Abstract The structural characterization of a new organic compound (3, 5-bis (4-chlorophenyl)-4,5-dihydro-1H-Pyrazole) was analyzed experimentally by 1HNMR and FT-IR spectroscopic technique. The analysis of HOMO-LUMO and natural bond orbital are investigated to study the charge transfer interactions which is leading to the properties of nonlinear behavior. linear optical properties of anew organic compound / Poly (O- Methoxyaniline) (POMA) film was studied using Wemble and Didomenico (WD) technique to estimate the refractive index n and other optical constant such as the oscillation energy E0, the dispersion energy Ed, and the lattice dielectric constant. Measurements of the thermally induced optical nonlinearity of novel organic compound (3, 5-bis (4-chlorophenyl)-4, 5-dihydro-1H- Pyrazole) in an organic solvent (N-methyl-2-pyrrolidone) NMP)) was studied through an excitation source (continuous wave diode laser at the wavelength of 473 nm) in the case of the solution and a conducting polymer film. The Z-scan technique was used to measure the nonlinear refractive index )) to obtain the optical response of prepared material. The prepared sample illustrated negative and large values in the order of 10− 7 cm2/W and reverse saturable absorption )RSA) with large values of the nonlinear absorption coefficient in the order of 10− 3 cm/W. The nonlinear refractive index was determined and varied as a response to different concentrations. The determination of the figure of merit (W) and nonlinear coefficients indicate that the compound is a promising candidate for applications in the nonlinear optics field.

scholarly journals The effects of laser intensities on nonlinear properties for Ag nanoparticles colloid

2019 ◽  
Vol 15 (34) ◽  
pp. 36-40
Author(s):  
Mazin M. Elias
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Ccd Camera ◽  
Optical Response ◽  
Blue Laser ◽  
Nonlinear Optical Response ◽  
Third Order ◽  
Nonlinear Properties ◽  
Nano Fluid

A huge potential from researchers was presented for enhancing the nonlinear optical response for materials that interacts by light. In this work, we study the nonlinear optical response for chemically prepared nano- fluid of silver nanoparticles in de-ionized water with TSC (Tri-sodium citrate) protecting agent. By the means of self-defocusing technique and under CW 473 nm blue laser, the reflected diffraction pattern were observed and recorded by CCD camera. The results demonstrate that, the Ag nano-fluid shows a good third order nonlinear response and the magnitude of the nonlinear refractive index was in the order of 10−7 cm2/W. We determine the maximum change of the nonlinear refractive index and the related phase shift for the material at six input laser intensities.

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