Third-harmonic generation and its applications in optical image processing

Fuentes-Hernández, Canek; Ramos‐Ortíz, Gabriel; Tseng, Shuo Yen; Gaj, Michael P.; Kippelen, Bernard

doi:10.1039/b905561d

Cited by 36 publications

(22 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6][7][8] We have previously reported a range of hydroxy-functionalised chromophores, including I ( Fig. 1), in which dicyanovinyl or tricyanovinyl acceptors are attached to the 5-position of thiophenes linked by a vinylene bridge in the 2 position to triarylamine donors.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of a dipolar chromophore with third-harmonic generation applications in the near-IR

et al. 2012

View full text Add to dashboard Cite

E-2-Tricyanovinyl-3-n-hexyl-5-[4-{bis(4-n-butylphenyl)amino}-2-methoxystyryl]-thiophene, 1, has previously been used to demonstrate applications relying on frequency tripling of 1.55 mm light. Here we report the synthesis and chemical characterisation of 1, along with quantum-chemical calculations and additional experimental investigations of its third-order nonlinear properties that give more insight into its frequency tripling properties. Although 1 can be processed into amorphous films, crystals can also be grown by slow evaporation of solutions; the crystal structure determined by X-ray diffraction shows evidence of significant contributions from zwitterionic resonance forms to the ground-state structure, and reveals centrosymmetric packing exhibiting p-p and C-H/N^C interactions. Both solutions and films of 1 exhibit near-infrared two-photon absorption into the low-lying one-photon-allowed state with a peak two-photon cross-section of ca. 290 GM (measured using the white-light continuum method with a pump wavelength of 1800 nm) at a transition energy equivalent to degenerate two-photon absorption at ca. 1360 nm; two related chromophores are also found to show comparable near-IR two-photon crosssections. Closed-aperture Z-scan measurements and quantum-chemical calculations indicate that the nonlinear refractive index and third-harmonic generation properties of 1 are strongly dependent on frequency in the telecommunications range, due the aforementioned two-photon resonance.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterisation of a dipolar chromophore with third-harmonic generation applications in the near-IR

et al. 2012

View full text Add to dashboard Cite

show abstract

“…In the present study we focus on the latter process that enables frequency tripling. Third‐harmonic generation (THG) is a phenomenon in which incident laser beam at the frequency ω interacts with a nonlinear optical medium, which results in the generation of a new spectral component at the frequency 3ω . THG can be realized either via indirect, cascaded second order processes, or through the direct third‐order (χ (3) ) process ,,.…”

Section: Introductionmentioning

confidence: 99%

“…The third‐order THG is an inherently ultra‐fast electronic process offering high temporal resolution of optical signals. For this reason, it has been employed in various areas such as time‐gated imaging, image recognition, scanning microscopy, all‐optical processor logic units, or UV lasers …”

Section: Introductionmentioning

confidence: 99%

“…Third-harmonic generation (THG) is a phenomenon in which incident laser beam at the frequency ω interacts with a nonlinear optical medium, which results in the generation of a new spectral component at the frequency 3ω. [1][2][3] THG can be realized either via indirect, cascaded second order processes [1,4] or through the direct third-order (χ (3) ) process. [1,5,6] The thirdorder THG is an inherently ultra-fast electronic process offering high temporal resolution of optical signals.…”

Section: Introductionmentioning

confidence: 99%

“…[1,5,6] The thirdorder THG is an inherently ultra-fast electronic process offering high temporal resolution of optical signals. For this reason, it has been employed in various areas such as time-gated imaging, image recognition, [3] scanning microscopy, [7] all-optical processor logic units, [8] or UV lasers. [9][10][11] Among many χ (3) materials utilized as nonlinear optical media, transparent silica-based composites doped with nanoparticles (NP), exhibiting strong plasmonic resonant response, have gained attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Seedless Method for Gold Nanoparticle Growth inside a Silica Matrix: Fabrication of Materials Capable of Third‐Harmonic Generation in the Near‐Infrared

et al. 2019

View full text Add to dashboard Cite

A composite in which gold nanoparticles (AuNPs) approximately 10 nm in size are embedded in amorphous transparent silica matrix has been produced. The synthetic protocol uses HAuCl4 as the Au ion source, tetraethoxysilane (TEOS) as the SiO2 precursor, and l‐ascorbic acid (AA) as the reducing agent. AA is employed before the sol‐gel process in an amount sufficient only for reduction of Au3+ ions to Au+. By using a cationic surfactant, benzylcetyldimethylammonium chloride hydrate (BDAC) and/or cetyltrimethylammonium bromide (CTAB), the Au+ ions are encapsulated within metalomicelles, which prevents them from being reduced to Au0 and enables their homogeneous distribution in the gel. Reduction of Au+ to Au0 and the growth of the AuNPs occurs at room temperature during the gelation, and arises from the release of EtOH during the hydrolysis of TEOS. The composites contain 0.027 wt % of Au. They exhibit nonlinear optical behavior characterized by the third‐order nonlinear refraction index, n2, in the range 3.6–5.7×10−16 cm2 W−1 at λ=1.030 μm. The composites are capable of effective third‐harmonic generation of ultrashort near‐IR (210 fs, 1.030 μm) laser pulse through a direct third‐order mechanism.

show abstract

Study of the Crystalline Perfection, Homogeneity, Chemical Etching on the Surface, and Third‐Order Nonlinear Optical Properties of (1 1 0) Oriented Hydroxyethylammonium D‐Tartrate Monohydrate Single Crystal and Hirshfeld Surface Analysis

Hakkim¹,

Rajesh²,

Sidden³

et al. 2022

Cryst. Res. Technol.

View full text Add to dashboard Cite

The single crystal of hydroxyethylammonium D-tartrate monohydrate (HEDT) is grown along the (1 1 0) plane using the Sankaranarayanan-Ramasamy method. The powder X-ray diffraction and the high-resolution X-ray diffraction analyses are used to corroborate the growth plane and perfection of the crystallinity, respectively. The birefringence experiment has proven crystalline homogeneity and estimated birefringence value (𝚫n) is 0.109. The surface morphology of the grown crystal is examined by chemical etching analysis and irregular hillock patterns are found. The transmittance for the (1 1 0) plane of the HEDT is inspected by a UV-Vis analysis. The second harmonic generation efficiency of the HEDT crystal is 1.7 times that of potassium dihydrogen phosphate (KDP). The third-order nonlinear optical (TONLO) properties of the grown HEDT crystal are scrutinized by the Z-scan experiment. The estimated TONLO susceptibility of HEDT crystal is 6.827 × 10 −8 esu. The laser damage threshold value of HEDT is discovered to be 5.24 GW cm −2 . The 3D Hirshfeld surface visualizes the interaction between HEDT molecules and analyzes the distance from the surface of the molecule to the farthest and the nearest atom. The important contributions of crystal packing are explored by 2D-fingerprint plots.

show abstract

Third-harmonic generation and its applications in optical image processing

Cited by 36 publications

References 30 publications

Characterisation of a dipolar chromophore with third-harmonic generation applications in the near-IR

Characterisation of a dipolar chromophore with third-harmonic generation applications in the near-IR

A Seedless Method for Gold Nanoparticle Growth inside a Silica Matrix: Fabrication of Materials Capable of Third‐Harmonic Generation in the Near‐Infrared

Study of the Crystalline Perfection, Homogeneity, Chemical Etching on the Surface, and Third‐Order Nonlinear Optical Properties of (1 1 0) Oriented Hydroxyethylammonium D‐Tartrate Monohydrate Single Crystal and Hirshfeld Surface Analysis

Contact Info

Product

Resources

About