Picosecond optical nonlinearities in symmetrical and unsymmetrical phthalocyanines studied using the Z-scan technique

Venugopal Rao, S.; Anusha, P.; Giribabu, L.; Tewari, Surya
November 2010
Pramana: Journal of Physics;Nov2010, Vol. 75 Issue 5, p1017
Academic Journal
We present our experimental results on the picosecond nonlinear optical (NLO) studies of symmetrical and unsymmetrical phthalocyanines, examined using the Z-scan technique. Both the open-aperture and closed-aperture Z-scan curves for three samples were recorded and the nonlinear coefficients were extracted from the theoretical fits. The nonlinear absorption/refraction contribution from the solvent was also identified. The observed open aperture behaviour for these molecules is understood in terms of the absorption coefficients of these molecules near 800 nm and the peak intensities used. It is established that these phthalocyanines exhibit large optical nonlinearities and, hence, are suitable for optical limiting applications.


Related Articles

  • Characteristics of optical limiting in media with nonlinear absorption and scattering. S. E.Zelensky; Kolesnik, O. S.; Kopyshinsky, O. V. // Semiconductor Physics, Quantum Electronics & Optoelectronics;2005, Vol. 8 Issue 3, p74 

    A comparative study is performed for characteristics of optical limiting in the media with nonlinear absorption and scattering with the use of nanosecond-scale laser pulses. Two methods are proposed to analyze of experimental nonlinear transmittance curves. The experiments revealed differences...

  • Study of Third- and Fifth-Order Nonlinear Optical Processes in Thin C60 Films. Ryasnyanskiĭ, A. I. // Optics & Spectroscopy;Jul2005, Vol. 99 Issue 1, p126 

    The nonlinear refraction in thin films of fullerene C60 (100 nm) is studied by the Z- and RZ-scan methods using the second harmonic of a picosecond Nd:YAG laser (λ = 532 nm, τ = 55 ps). The combined effect of n2 (self-focusing of laser radiation) and n4 (self-defocusing) is analyzed....

  • Ultrafast laser direct-write actuable microstructures. Tapalian, H, Charles; Langseth, Jason; Ying Chen; Anderegg, James W.; Shinar, Joseph // Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p243304 

    Actuable microelectromechanical systems (MEMS), fabricated by direct “writing” of deformable membranes on indium tin oxide/copper phthalocyanine (CuPc)/Al microstructures using 130 fs laser pulses, are described. The pulses locally ablate the CuPc without requiring micromachined...

  • Third-order nonlinear optical interactions of C60 and C70. Aranda, Francisco J.; Rao, D. V. G. L. N.; Roach, Joseph F.; Tayebati, P. // Journal of Applied Physics;6/1/1993, Vol. 73 Issue 11, p7949 

    Presents a study which measured the third-order nonlinear optical susceptibility Χ[sup(3)] for C[sub60] and C[sub70] solutions as a function of concentration using degenerate four-wave mixing with picosecond pulses. Calculation of the real and imaginary components of the molecular...

  • NLO properties of a new Au-dithiolene complex. Chatzikyriakos, G.; Aloukos, P.; Couris, S.; Anyfantis, G. C.; Papavassiliou, G. C. // AIP Conference Proceedings;11/10/2010, Vol. 1288 Issue 1, p151 

    In the present work we report on the investigation of the nonlinear optical response of a recently synthesized Au-dithiolene complex (i.e., Au(dpedt)2) using Z-scan technique, employing 35 ps, visible (532 nm) and infrared (1064 nm) laser pulses. In both cases, the nonlinear absorptive and...

  • Nonlinear optical properties of antimony—germanium—sulfur glasses at 1560 nm. Gómez, L.; Araújo, C.; Putvinskis, R.; Messaddeq, S.; Ledemi, Y.; Messaddeq, Y. // Applied Physics B: Lasers & Optics;Mar2009, Vol. 94 Issue 3, p499 

    Nonlinear (NL) optical properties of antimony–germanium–sulfur (Sb–Ge–S) glasses were investigated using laser pulses of 65 fs at 1560 nm. Samples having concentration ratio [S]/[Ge]=2.69 with different antimony concentrations were studied. Glasses with different...

  • Precision measurement: A comb in the extreme ultraviolet. Young, Linda // Nature;2/2/2012, Vol. 482 Issue 7383, p45 

    The article discusses an article in the issue by A. Cingöz and team regarding the development of an extreme-ultraviolet frequency photon comb. The experimental design involved the use of ultra-fast ytterbium-fibre laser pulses with an enhancement optical cavity designed to optimize...

  • Dynamical temporal evolution of molecular IR absorption spectra observed with picosecond CO2 laser pulses. Mukherjee, P.; Kwok, H. S. // Journal of Chemical Physics;7/1/1987, Vol. 87 Issue 1, p128 

    The variation of the collisionless absorption spectral shapes for vibrationally excited SF6 and C2F5Cl molecules as a function of the picosecond probe pulse duration was determined using a two-IR frequency pump–probe scheme. The experiments revealed a spectral narrowing with decreasing...

  • On the contribution of nonlinear scattering to optical limiting in C[sub 60] solution. Mishra, S. R.; Rawat, H. S.; Joshi, M. P.; Mehendale, S. C. // Applied Physics A: Materials Science & Processing;1996, Vol. 63 Issue 3, p223 

    We present experimental results which bring out the contribution of nonlinear scattering to the energy limiting of 527 nm, 30 ns pulses in C[sub 60] solution. To perform these measurements we used a specific experimental arrangement to separate the effects of nonlinear refraction and scattering....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics