Generation of a Phase-Matched Optical Third Harmonic by Introduction of Anomalous Dispersion into a Liquid Medium

Bey, P.P.; Giuliani, J. F.; Rabin, Herbert

doi:10.1103/physrevlett.19.819

Cited by 57 publications

(23 citation statements)

References 2 publications

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“…Theoretical expressions for the hyperpolarizability derived from third-order perturbation theory explain the experimental findings. The enlarged dye hyperpolarizability compared to the solvent (lyoVys^lOOO) * s well understood by the broad absorption bands at or near to the involved frequencies co l9 2co l9 and co 3 = 3co 1 .…”

Section: Discussionmentioning

confidence: 99%

“…The conversion efficiency r\ could be increased about a factor of 50 (fuchsin [1][2][3][4]) to 4000 (hexamethylindocarbocyanine iodide [5]) compared to the neat solvent. Phasematching was achieved by utilizing the anomalous dispersion of the refractive index of the dye solutions.…”

Section: Pacs: 4265 4265 Bmentioning

confidence: 94%

“…[11] in) The hyperpolarizability of rhodamine 6G and fuchsin is mainly imaginary while the hyperpolarizability of methylene blue is mainly real. are included where £ is the anharmonic coupling constant, m the electron mass, / the oscillator strength, e the electron charge and y (1) (a> f ) the linear polarizability. y {1 \2co) is not involved.…”

Section: Discussionmentioning

confidence: 99%

“…Phasematched third-harmonic generation in dye solutions was studied in the past as potential process of efficient frequency tripling [1][2][3][4][5][6]. The conversion efficiency r\ could be increased about a factor of 50 (fuchsin [1][2][3][4]) to 4000 (hexamethylindocarbocyanine iodide [5]) compared to the neat solvent.…”

Section: Pacs: 4265 4265 Bmentioning

confidence: 99%

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Third-order nonlinear susceptibilities of dye solutions determined by third-harmonic generation

Leupacher

Penzkofer

1985

Appl. Phys. B

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Abstract. The third-order nonlinear susceptibilities x { xxxx ( -^ w i> w i> &>i) versus concentration are determined for rhodamine 6G, fuchsin, and methylene blue in methanol. Third-harmonic generation of a modelocked Nd-glass laser is applied. The real and imaginary part of the nonlinear susceptibility are measured. A resonance enhancement due to absorption bands is observed. Here we determine the dependence of third-order nonlinear susceptibilities xx 3 xxx ( -^3; co l9 co u co x ) on dye concentration for rhodamine 6G, fuchsin and methylene blue in methanol. The efficiency of conversion of picosecond light pulses of a mode-locked Ndglass laser to the third harmonic is measured. The nonlinear susceptibilities are deduced by comparison with calculations [7]. The absorption coefficients and refractive indices entering the calculations are separately measured [8,9]. The nonlinear susceptibilities comprise contributions from the solvent and the solute. The complex solute hyperpolarizabilities are determined and compared with the real solvent hyperpolarizability. The resonance enhancement is analyzed.

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Section: Discussionmentioning

confidence: 99%

Section: Pacs: 4265 4265 Bmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Pacs: 4265 4265 Bmentioning

confidence: 99%

See 2 more Smart Citations

Third-order nonlinear susceptibilities of dye solutions determined by third-harmonic generation

Leupacher

Penzkofer

1985

Appl. Phys. B

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“…1) has a very strong absorption band around 530 nm and shows very weak absorption at 350 nm. These features make the dye a potential candidate for efficient conversion of intense picosecond Nd-glass laser pulses at X L = 1.055 jutm to X 3 = 351.7 nm by phase-matched thirdharmonic generation [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Concentration-dependent absorption and emission behaviour of a pyrimidonecarbocyanine dye in hexafluoroisopropanol

et al. 1987

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Strong Nonlinear Optical Response in the Visible Spectral Range with Epsilon‐Near‐Zero Organic Thin Films

Lee

Garoni

Kita

et al. 2018

Advanced Optical Materials

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The optical properties of a medium are described by the dielectric permittivity ε and the refractive index N, where ε is a measure how much polarization is induced upon application of an optical electric field, while refractive index N determines how the optical phase develops as optical wave propagates in the optical medium by associating momentum k and energy ω. Optical epsilon-near-zero (ENZ) material possesses the permittivity |ε| → 0 and the phase velocity of optical wave becomes very large while the group velocity is slowing down significantly, owing to the relation between refractive index and permittivity, ε = N .[1] Related to nonlinear optical processes, this simple equation also implies that the optical Kerr nonlinearity is strongly enhanced in the ENZ spectral range. [2] Enhanced Kerr nonlinearities are observed in metamaterials such as conducting oxides and doped inorganic semiconductor thin films showing epsilon-nearzero (ENZ) response in the infrared region. However, to achieve ENZ in the visible, artificial metamaterials with more complex nanostructures have to be specifically designed. [2,4-bis[8-hydroxy-1,1,7,7-tetramethyljulolidin-9-yl] squaraine] organic thin films, ENZ responses between 450 and 620 nm are demonstrated. Both nonlinear refractive index and nonlinear absorption coefficient are enhanced by more than two orders of magnitude in the ENZ spectral region. These optical effects in the visible spectral range come from the strongly dispersive permittivity of molecular aggregates resulting from the coupling of excitonic transition dipoles. These findings open the path toward a next generation of high-performance solution-processable organic nonlinear optical materials with ENZ properties that can be tuned by molecular engineering. Here, using sodium [5,6-dichloro-2-[[5,6-dichloro-1-ethyl-3-(4-sulphobutyl)-benzimidazol-2-ylidene]-propenyl]-1-ethyl-3-(4-sulphobutyl)-benzimidazolium hydroxide] and

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Generation of a Phase-Matched Optical Third Harmonic by Introduction of Anomalous Dispersion into a Liquid Medium

Cited by 57 publications

References 2 publications

Third-order nonlinear susceptibilities of dye solutions determined by third-harmonic generation

Third-order nonlinear susceptibilities of dye solutions determined by third-harmonic generation

Concentration-dependent absorption and emission behaviour of a pyrimidonecarbocyanine dye in hexafluoroisopropanol

Strong Nonlinear Optical Response in the Visible Spectral Range with Epsilon‐Near‐Zero Organic Thin Films

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