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  1. No Access

    Article

    Nonlinear optical characterization of colloidal solutions containing dye and Ag2S quantum dot associates

    We analyzed the nonlinear absorption and refraction in the dyes and silver sulfide quantum dot (QD) associates. The nonlinear refractive indices, nonlinear absorption coefficients, and third-order nonlinear su...

    G. S. Boltaev, B. Sobirov, S. Reyimbaev, H. Sherniyozov, T. Usmanov… in Applied Physics A (2016)

  2. No Access

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    Investigation of nonlinear optical properties of various organic materials by the Z-scan method

    We have studied the nonlinear optical properties of various organic materials (vegetable oil, juice, wine, cognac, Coca-Cola and Fanta drinks, Nescafé coffee, tea, gasoline, clock oil, glycerol, and polyphenyl...

    R. A. Ganeev, G. S. Boltaev, R. I. Tugushev, T. Usmanov in Optics and Spectroscopy (2012)

  3. No Access

    Article

    Low- and high-order nonlinear optical characterization of C60-containing media

    Third- and higher-order nonlinear optical processes in fullerenes were studies to define the influence of low-order nonlinearities on the high-order harmonic generation in these media. We measured the nonlinea...

    R. A. Ganeev, G. S. Boltaev, R. I. Tugushev, T. Usmanov… in The European Physical Journal D (2011)

  4. No Access

    Article

    Nonlinear pulse compression by the second-harmonic generation in quasiphase and group-velocity matched samples

    We investigate numerically the second-harmonic generation from near infrared 100 fs pulses in periodically and aperiodically poled lithium niobate crystals, taking into account the group-velocity mismatch, the...

    U. K. Sapaev, I. A. Kulagin, T. Usmanov, G. Assanto in Journal of Russian Laser Research (2011)

  5. No Access

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    Nonlinear optical absorption and refraction in Ru, Pd, and Au nanoparticle suspensions

    We present the results of studies of the nonlinear optical properties of Pd, Ru, and Au nanoparticles. We studied the nonlinear refraction and nonlinear absorption of suspensions of these nanoparticles at 1064...

    R. A. Ganeev, G. S. Boltaev, R. I. Tugushev, T. Usmanov in Applied Physics B (2010)

  6. No Access

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    Nanoparticle formation during laser ablation of metals at different pressures of surrounding noble gases

    We demonstrate that the nanoparticle formation during laser ablation of metals by short (of a few tens of ps) laser pulses strongly depends on the concentration of surrounding gas. While, at vacuum conditions,...

    R. A. Ganeev, G. S. Boltaev, R. I. Tugushev, T. Usmanov in Applied Physics A (2010)

  7. No Access

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    Application of the nonlinear optical properties of platinum nanoparticles for the mode locking of Nd:glass laser

    We analyzed the saturated absorption of a platinum nanoparticle suspension using 1064-nm, 50-ps pulses at different intensities of laser radiation. The concurrence of reverse saturated absorption and saturated...

    R. A. Ganeev, R. I. Tugushev, T. Usmanov in Applied Physics B (2009)

  8. No Access

    Article

    The use of three-photon absorption for optical limiting of laser radiation

    The results of a study of nonlinear refraction and nonlinear absorption at a wavelength of 532 nm in an LGO (Li2Ge2O15) crystal by Z-scan methods are presented. It is shown that the nonlinear refraction is caused...

    R. A. Ganeev, A. I. Ryasnyanskiĭ, M. K. Kodirov… in Optics and Spectroscopy (2007)

  9. No Access

    Article

    Nonstationary frequency doubling in periodically-poled nonlinear crystals in the presence of self-action effects

    The efficiency of the nonstationary frequency doubling of a phase-modulated ultrashort laser pulse under conditions of strong energy exchange is analyzed in detail taking into account the self-action effects i...

    I. A. Kulagin, U. K. Sapaev, T. Usmanov, A. A. Uzakov… in Journal of Russian Laser Research (2007)

  10. No Access

    Article

    Optimization of third harmonic generation for two coupled three-frequency interactions of waves with multiple frequencies in periodic crystals

    Third harmonic generation with simultaneous excitation of degenerate two-frequency (2ω = ω + ω) and three-frequency (3ω = 2ω + ω) interactions of collinear waves in periodic crystals is considered. It is shown...

    U. K. Sapaev, I. A. Kulagin, N. Kh. Satlikov, T. Usmanov in Optics and Spectroscopy (2006)

  11. No Access

    Article

    Ion synthesis and optical properties of gold nanoparticles in an Al2O3 matrix

    Single-crystal Al2O3(0001) and Al2O3(1120) substrates are implanted by 160-keV Au+ ions with doses from 1015 to 1017 cm−2. Some of the implanted samples are air-annealed at 800–1200°C. The properties of the synth...

    A. L. Stepanov, C. Marques, E. Alves, R. C. da Silva, M. R. Silva… in Technical Physics (2006)

  12. No Access

    Article

    Investigation of the nonlinear optical characteristics of composite materials based on sapphire with silver, copper, and gold nanoparticles by the reflection Z-scan method

    The nonlinear optical characteristics of silver, copper, and gold nanoparticles synthesized in a sapphire matrix by ion implantation are studied. The measurements are performed by the RZ-scan method with optical ...

    R. A. Ganeev, A. I. Ryasnyanskiĭ, A. L. Stepanov, T. Usmanov… in Optics and Spectroscopy (2006)

  13. No Access

    Article

    Nonlinear optical properties of gold nanoparticles synthesized by ion implantation in sapphire matrix

    Single crystal Al2O3 substrates have been implanted with 160-keV Au+ to a dose of 0.6 × 1017 or 1.0 × 1017 cm−2, with a postimplantation annealing for 1 h at 800°C in air. The obtained composite layers were studi...

    A. L. Stepanov, C. Marques, E. Alves, R. C. da Silva… in Technical Physics Letters (2005)

  14. No Access

    Article

    Saturated absorption and nonlinear refraction of silicate glasses doped with silver nanoparticles at 532 nm

    The nonlinear optical characteristics of silicate glasses doped with silver nanoparticles are investigated by Z-scan technique using second harmonic radiation of picosecond Nd:YAG laser (λ=532 nm, τ=55 ps). The r...

    R.A. Ganeev, A.I. Ryasnyansky, A.L. Stepanov, T Usmanov in Optical and Quantum Electronics (2004)

  15. No Access

    Article

    Effect of higher order nonlinear optical processes on optical absorption in the photorefractive BSO and BGO crystals

    The processes of nonlinear refraction and nonlinear absorption are studied in the photorefractive Bi12SiO20 (BSO) and Bi12GeO20 (BGO) crystals at a wavelength of a picosecond Nd:YAG laser of 1064 nm. The nonlinea...

    R. A. Ganeev, A. I. Ryasnyanskiĭ, R. I. Tugushev, M. K. Kodirov… in Optics and Spectroscopy (2004)

  16. No Access

    Article

    Nonlinear Optical Characteristics of BSO and BGO Photorefractive Crystals in Visible and Infrared Ranges

    Nonlinear refraction, nonlinear absorption and optical limiting in photorefractive crystals Bi12SiO20(BSO) and Bi12GeO20(BGO) at the wavelengths of 1064 and 532 nm were investigated. It was shown that both BSO an...

    R. A. Ganeev, A. I. Ryasnyansky, R. I. Tugushev… in Optical and Quantum Electronics (2004)

  17. No Access

    Article

    Nonlinear optical response of silver and copper nanoparticles in the near-ultraviolet spectral range

    The nonlinear optical response of silver and copper nanoparticles synthesized by ion implantation in silica glasses is studied in the near-ultraviolet spectral range at a wavelength of 354.7 nm. The real and i...

    R. A. Ganeev, A. I. Ryasnyansky, A. L. Stepanov, T. Usmanov in Physics of the Solid State (2004)

  18. No Access

    Article

    Change of optimum conditions of second harmonic generation of spatial limited laser beams in nonlinear crystals

    Frequency doubling of spatially limited laser beams in nonlinear crystals is investigated theoretically. It was shown that the major factor, which reduces the second harmonic generation (SHG) efficiency in thi...

    U.K. Sapaev, I.A. Kulagin, T. Usmanov in Optical and Quantum Electronics (2003)

  19. No Access

    Article

    Nonlinear properties of composites based on dielectric layers containing copper and silver nanoparticles

    Nonlinear optical characteristics of copper and silver nanoparticles in glass host matrices are studied by the Z-scan method at the wavelength of a Nd:YAG laser (λ=1064 nm) in a field of picosecond pulses. It ...

    R. A. Ganeev, A. I. Ryasnyanskii, A. L. Stepanov, M. K. Kondirov… in Optics and Spectroscopy (2003)

  20. No Access

    Article

    Nonlinear optical characteristics of polymethine dyes

    Nonlinear refraction, nonlinear absorption, and saturated absorption of a number of polymethine dyes are studied and their nonlinear optical parameters are measured by the Z-scan method (λ=1064 nm). Simultaneous ...

    R. A. Ganeev, R. I. Tugushev, A. A. Ishchenko, N. A. Derevyanko… in Optics and Spectroscopy (2003)

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