Ultrafast exciton dynamics in highly oriented polydiacetylene films

Nisoli, M.; Pruneri, V.
August 1994
Applied Physics Letters;8/1/1994, Vol. 65 Issue 5, p590
Academic Journal
Investigates the nonlinear optical and relaxation dynamics in uniaxially oriented films of poly[1.6-di(N-carbazolyl)-2,4-hexadiyne], epitaxially grown on a potassium acid phthalate single crystal. Effect of sample orientation on relaxation dynamics; Influence of the degree of polymer chain orientation on bleaching decay; Features of bleaching decays.


Related Articles

  • Relaxational diffusion in guest–host polyphosphazene thin films: Temperature dependence. Martin, G.; Rojo, G.; Agulló-López, F. // Journal of Applied Physics;4/1/2004, Vol. 95 Issue 7, p3477 

    The relaxation of poled guest–host polyphosphazene (PPZ) films containing the 4-[(4′-nitrophenyl)azo]phenoxy (NPAP) azo-dye chromophore (T[sub g]=144 °C) has been investigated by measuring the time decay of the nonlinear optical susceptibility tensor in the 80–120 °C...

  • Light-induced processes in a-Si:H films at elevated temperatures. Kurova, I. A.; Larina, É. V.; Ormont, N. N.; Senashenko, D. V. // Semiconductors;Dec97, Vol. 31 Issue 12, p1257 

    At temperatures T > 120 °C the kinetics of the dark conductivity (σ[sub d]) of undoped and borondoped a-Si:H films during and after the cessation of illumination is observed to be nonmonotonic, with fast and slow processes of variation of σ[sub d] of opposite sign. A fast or slow...

  • Relaxation kinetics of photoinduced surface relief grating on azopolymer films. Matsui, Tatsunosuke; Yamamoto, Shin-ichiro; Ozaki, Masanori; Yoshino, Katsumi; Kajzar, Francois // Journal of Applied Physics;12/15/2002, Vol. 92 Issue 12, p6959 

    The relaxation kinetics of the photoinduced surface relief grating (SRG) formed on an azopolymer film after stopping laser beam writing has been systematically investigated. In addition to a photoinduced increase of the diffraction efficiency in the SRG, an anomalous further enhancement of the...

  • Temperature dependence of second-order nonlinear relaxation of a poled chromophore-doped sol–gel material. Goudket, He´le`ne; Canva, Michael; Le´vy, Yves; Chaput, Fre´de´ric; Boilot, Jean-Pierre // Journal of Applied Physics;12/15/2001, Vol. 90 Issue 12, p6044 

    Second-order optical nonlinearity relaxations of hybrid inorganic/organic sol-gel films doped with poled Disperse Red 1 chromophores were measured by second harmonic generation at several temperatures. The decay curves were fitted to biexponentials and Köhlrausch, Williams, and Watts (KWW)...

  • Thermal stability and relaxation in diamond-like-carbon. A Raman study of films with different... Kalish, R.; Lifshitz, Y.; Nugent, K.; Prawer, S. // Applied Physics Letters;5/17/1999, Vol. 74 Issue 20, p2936 

    Studies the thermal stability and relaxation processes in hydrogen free diamond-like-carbon films with different sp[sup 3] fractions using Raman spectroscopy. Stability of the films under annealing; Changes in optical transmission; Relevance of results to applications requiring high thermal...

  • Phonon scattering in silicon films with thickness of order 100 nm. Ju, Y.S.; Goodson, K.E. // Applied Physics Letters;5/17/1999, Vol. 74 Issue 20, p3005 

    Studies the relaxation times of room-temperature thermal phonons through measurements of thermal conduction along monocrystalline silicon films. Oxidation and etching process that ensures the purity and crystalline quality of the films; Reduction of thermal conductivity by phonon-interface...

  • Elastic energy release due to domain formation in the strained epitaxy of ferroelectric and ferroelastic films. Pompe, W.; Gong, X.; Suo, Z.; Speck, J. S. // Journal of Applied Physics;11/15/1993, Vol. 74 Issue 10, p6012 

    Presents a study which examined twin related domain formation as a strain relaxation mechanism for a heteroepitaxial tetragonal film on a cubic substrate. Definition of the problem and physical model of strained epitaxy of a thin tetragonal film; Calculation of the strain energy;...

  • Superluminescence of Er[sup 3+] in an Amorphous Silicon Matrix. Emel’yanov, V. I.; Kamenev, B. V.; Kashkarov, P. K.; Konstantinova, E. I.; Timoshenko, V. Yu.; Terukov, E. I.; Bresler, M. S.; Gusev, O. B. // Physics of the Solid State;Aug2000, Vol. 42 Issue 8, p1410 

    The photoluminescence of Er[sup 3+] ions in thin films of amorphous silicon has been studied under conditions of intense pumping. A superlinear increase in the amplitude and a shortening of the photoluminescence relaxation times are revealed at a pumping intensity above 200kW/cm[sup 2]. The data...

  • Relaxation modulus and thermal expansion coefficient of polyimide films coated on substrates. Jwo-Huei Jou; Lih-Jiuan Chen // Applied Physics Letters;7/1/1991, Vol. 59 Issue 1, p46 

    Presents a bending beam technique for determining the relaxation modulus and thermal expansion coefficient of polyimide thin films coated on silicon substrates. Correlation between film thickness and thermal expansion coefficient; Factors contributing to the film stress concentration; Variation...


Read the Article


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

Try another library?
Sign out of this library

Other Topics