Optical, nonlinear optical, and electrooptical properties of 4'-nitrobenzylidene-3-acetamino-4-methoxyaniline (MNBA) crystals

Knöpfle, G.; Bosshard, Christian; Schlesser, R.; Günter, Peter

doi:10.1109/3.303688

Cited by 37 publications

(9 citation statements)

References 23 publications

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“…Here, using a well-known expression for the amplification increment g ssR P thr l SRS % 30 (where P thr is the pump peak power above which lasing was reliably arising at the first Stokes component of MNBA and PbWO 4 crystals and l SRS % 1 mm is the SRS-active length of measured samples), we estimated the required coefficient to be higher than that 7 cm/GW, by virtue of the fact that P thr (PbWO 4 ) % 2.5P thr (MNBA). Unfortunately, we could not measure the value of g ssR for the first Stokes generation of MNBA at l St1 = 0.5811 mm due to high absorption coefficient !7.5 cm -1 [9] at l f2 = 0.53207 mm. c (2) and c (3) laser emission l f * ) (mm) line attribution 0.53207 0.53207 l f2 w f2 0.5811…”

Section: Resultsmentioning

confidence: 99%

“…7 cm/GW) make this material attractive for a number of new applications in modern quantum electronics and nonlinear optics. Before, MNBA crystals were known also as electro-optic, photorefractive, and nonlinear waveguide materials [7][8][9]. [10].…”

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confidence: 99%

“…The spectral composition and other parameters of the arising second laser emissions in the c (2) -and c (3) -active MNBA crystal were measured with a Spectrometric Multichannel Analyzer equipped with a Hamamatsu Model S3923-1024Q Si-CCD array sensor (maximum sensitivity at %0.65 mm wavelength) and a grating monochromator (with Czerny-Turner arrangement). The nonlinear coefficient for SHG and refractive indices of MNBA at pumping l f1 = 1.06415 mm wavelength are d 11 % 175 pm/V and n 1 = 1.912, n 2 = 1.614, n 3 = 1.562, respectively [9]. The large nonlinearities of some organic crystals, in particular of MNBA with aromatic rings, donor -OCH 3 and acceptor group -NHCOCH 3 (Fig.…”

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New Nonlinear Effects in ?(2)- and ?(3)-Active Organic Crystals of 4?-Nitrobenzylidene-3-Acetamino-4- Methoxyaniline (MNBA): High-Order Stimulated Raman Scattering, Self-Frequency Doubling, and Self-Sum Frequency Mixing

Kaminskii

Hulliger

Eichler

2001

phys. stat. sol. (a)

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Subject classification: 78.30.Hv; 78.45.+h; S12Introduction Nowadays, nonlinear c (2) -and c (3) -active organic crystals represent a rapidly growing direction of solid-state physics and chemistry to obtain efficient second and third optical harmonic generation [1,2]. Other efficient nonlinear c (3) processes as stimulated Raman scattering (SRS) were outside the interest of experts working in these fields. This is rather astonishing, because the SRS phenomenon was discovered in a liquid organic material (nitrobenzene) almost 40 years ago [3]. The present note expands our search for new SRS laser converters (see, e.g., [4][5][6]). Here, for the first time we report experimental observation of c (2) and c (3) effects, namely the Stokes and anti-Stokes generation as well as self-frequency doubling (FD) and self-sum-frequency mixing (SFM), in the acentric molecular crystal 4 0 -nitrobenzylidene-3-acetamino-4-methoxyaniline (MNBA). We believe that its measured large Raman shift (w SRS % 1587 cm -1 ) and the estimated relatively high staedy-state Raman gain coefficient (g ssR ! 7 cm/GW) make this material attractive for a number of new applications in modern quantum electronics and nonlinear optics. Before, MNBA crystals were known also as electro-optic, photorefractive, and nonlinear waveguide materials [7][8][9].

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Section: Resultsmentioning

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New Nonlinear Effects in ?(2)- and ?(3)-Active Organic Crystals of 4?-Nitrobenzylidene-3-Acetamino-4- Methoxyaniline (MNBA): High-Order Stimulated Raman Scattering, Self-Frequency Doubling, and Self-Sum Frequency Mixing

Kaminskii

Hulliger

Eichler

2001

phys. stat. sol. (a)

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“…14 DAST belongs to the point group m. The angles between the dielectric principal axes x 1 and x 3 and the crystallographic axes a and c are 5.4°a nd 3.2°, respectively. 15 The x 2 axis is along the b axis. The polar axis of the crystal is along x 1 .…”

Section: Nonlinear Optical Susceptibilitiesmentioning

confidence: 99%

Parametric interactions in the organic salt 4-N,N-dimethylamino-4′-N′- methyl-stilbazolium tosylate at telecommunication wavelengths

Meier

Bösch

Bosshard

et al. 1998

Journal of Applied Physics

153

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We show that the organic salt 4-N,N-dimethylamino-4Ј-NЈ-methyl-stilbazolium tosylate, originally developed for electro-optic applications, is also a very interesting material for phase-matched parametric interactions such as frequency-doubling and optic parametric oscillation in the near infrared. These favorable properties are due to the large off-diagonal element d 26 which gives measured effective phase-matchable nonlinear optical coefficients of d eff ϭ31Ϯ5 and 15Ϯ3 pm/V at the telecommunication wavelengths of ϭ1313 and 1535 nm, respectively.

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“…The light was polarized along the dielectric xI, x2, and x3 axes. The absorption coefficients al, a2, and a3 were calculated from the measured transmission curves taking into account Fresnel losses due to multiple reflections at the crystal surfaces [17]. A large shift of the cutoff wavelength (corresponding to an absorption coefficient a = 5 cm-') can be observed.…”

Section: Advanced Materials (A1mentioning

confidence: 99%

Crystal growth and characterization of the organic salt 4‐N, N‐dimethylamino‐4′‐N‐methyl‐stilbazolium tosylate (dast)

et al. 1996

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Organic materials with large second-order nonlinear optical (NLO) susceptibilities are of interest because of their potential applications in optical signal processing and frequency conversion.['-31 Much work has therefore been devoted to the search for optimal molecular crystalline materials composed of stable chromophoric molecules with large molecular hyperpolarizabilities with an optimized orientation for large macroscopic NLO effects.Crystal growth research is of basic importance for the application of organic crystals in NLO and electro-optical devices.I4] Bulk crystalline samples of reasonable size and good quality are also essential for the accurate measurement of electro-optical and NLO coefficients in order to evaluate the potential for future applications. In addition, it has been found that, particularly in organic materials, the linear electro-optical responses are strongly dependent on the crystal quality.[" Furthermore, growth of bulk crystals of organic salts with large chromophoric cations has hardly been reported in the literature. In this work, we describe the growth of the organic salt crystal 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST), and the main results of the linear, nonlinear, and electro-optical characterization.In this crystal, the stilbazolium, one of the most efficient NLO chromophores, is the nonlinear optically active part.[61 The anion (tosylate) induces the non-centrosymmetric macroscopic crystal packing (see Fig. 2, bottom). DAST crystals have already been reported to have very large nonlinear optical su~ceptibilities.[~-~~~ The lack of reasonably large and optically homogeneous DAST crystals has hindered the accurate linear, nonlinear, and electro-optical characterization in earlier investigations of DAST.[*-'O1 DAST was synthesized by the condensation of 4-methyl-N-methyl pyridinium tosylate, which was prepared from 4-picoline and methyl toluenesulphonate, and 4-N,N-dimethylamino-benzaldehyde in the presence of pipendine (Scheme 1).DAST was then purified ( > 99.8 %) by recrystallization from water and methanol. Orange co-crystals, DAST . H20, in space group Pi (point group i, z = 2)[l2]were obtained from water or a methanol-water mixture. DAST can hardly be dissolved in non-polar and most polar solvents. Alcohol, however, is a reasonably good solvent for DAST and we found that methanol was the most suitable solvent for the growth of high-quality DAST crystals. The solubility curve for DAST in a methanol solution (see Fig. 1) was defined by saturating solutions at a high temperature and slowly cooling the solution in the presence of a precipitated solid to maintain equilibrium and analyzing the solution at defined temperatures.DAST single crystals were grown from a seeded saturated methanol solution (between 40 and 50°C with concentrations of about 4-5.5 g(DAST)/IOO g(so1vent)) by a 8 . 0 ) . I . , . , . , . , . , .

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Optical, nonlinear optical, and electrooptical properties of 4'-nitrobenzylidene-3-acetamino-4-methoxyaniline (MNBA) crystals

Cited by 37 publications

References 23 publications

New Nonlinear Effects in ?(2)- and ?(3)-Active Organic Crystals of 4?-Nitrobenzylidene-3-Acetamino-4- Methoxyaniline (MNBA): High-Order Stimulated Raman Scattering, Self-Frequency Doubling, and Self-Sum Frequency Mixing

New Nonlinear Effects in ?(2)- and ?(3)-Active Organic Crystals of 4?-Nitrobenzylidene-3-Acetamino-4- Methoxyaniline (MNBA): High-Order Stimulated Raman Scattering, Self-Frequency Doubling, and Self-Sum Frequency Mixing

Parametric interactions in the organic salt 4-N,N-dimethylamino-4′-N′- methyl-stilbazolium tosylate at telecommunication wavelengths

Crystal growth and characterization of the organic salt 4‐N, N‐dimethylamino‐4′‐N‐methyl‐stilbazolium tosylate (dast)

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