Polar diffraction gratings made by spatially periodic photopoling Langmuir–Blodgett films

Blinov, L. M.; Palto, S. P.; Yudin, S. G.; De Santo, M. P.; Cipparrone, G.; Mazzulla, A.; Barberi, R.
January 2002
Applied Physics Letters;1/7/2002, Vol. 80 Issue 1, p16
Academic Journal
Polar diffraction gratings have been prepared by spatially periodic photopoling Langmuir-Blodgett films consisting of azobenzene compounds. The gratings were made by film irradiation with two left circularly polarized Ar-ion laser beams under strong electric field from a corona discharge. Therefore, simultaneously with the spatial modulation of the linear refractive index, the local polar order of the film becomes periodically modulated (through symmetry, the latter is related to the modulation of second-order optical nonlinearity X[sup (2)]). The local polarity is shown by an electrostatic force microscopy technique: an image of the polar grating is recorded without any trace of periodicity in the film topography.


Related Articles

  • Thermally induced surface relief gratings in azobenzene polymers. Leopold, A.; Wolff, J.; Baldus, O.; Huber, M. R.; Bieringer, T.; Zilker, S. J. // Journal of Chemical Physics;7/8/2000, Vol. 113 Issue 2, p833 

    Recently, Ramanujam and co-workers described for the first time that surface relief gratings can be inscribed into azobenzene copolymers with a single pair of nanosecond laser pulses. We performed a detailed investigation of the involved processes. Two contributions to the diffraction efficiency...

  • Third-order nonlinear optical properties in Langmuir–Blodgett films of 4-docosylamino-4-nitroazobenzene. Fujiwara, I.; Ishibashi, T.; Asai, N. // Journal of Applied Physics;5/1/1994, Vol. 75 Issue 9, p4759 

    Provides information on a study which investigated the third-order nonlinear optical properties of 4-docosylamino-4-nitroazobenzene Langmuir-Blodgett films. Methods; Results; Conclusion.

  • Homeotropic-planar anchoring transition induced by trans-cis isomerization in ultrathin polyimide Langmuir–Blodgett films. Zakharov, A. V.; Iwamoto, Mitsumasa // Journal of Chemical Physics;6/15/2003, Vol. 118 Issue 23, p10758 

    The influence of the charge separation during the trans-cis conformational change between the surface azobenzene 6Az5PVA monolayer on polyimide Langmuir–Blodgett film on the surface charge density is investigated, using the Maxwell displacement current technique. It is theoretically...

  • Soft x-ray W/Be multilayer and its application to a diffraction grating Yuichi,Utsumi. Takahashi, Jun-ichi; Urisu, Tsuneo; Maezawa, Hideki // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p2024 

    Tungsten/beryllium multilayers were coated onto lamellar diffraction gratings using a neutral atom beam sputtering technique. Boundary roughness of the multilayer was estimated to be 6.0 Ã… as a standard deviation. Diffraction efficiency of the multilayer-coated grating was measured using...

  • Size-dependent thermal diffusivity of multilayered thin films deposited on substrates characterized by transient grating technique. Heng-yi Ju; Shu-yi Zhang; Zhe Li; Xiu-ji Shui; Pao-kuang Kuo // Applied Physics Letters;1/19/2009, Vol. 94 Issue 3, pN.PAG 

    The thermal diffusivities of bilayered thin films with nanoscaled thickness deposited on substrates are characterized by nanosecond transient grating method. Based on the transient grating experiment, two-dimensional thermal diffusivity model and eigenfunction expansion method are used to...

  • Photoinduced molecular reorientation dynamics in confined domains of Langmuir monolayers. Crusats, Joaquim; Albalat, Rosa; Claret, Josep; Ignés-Mullol, Jordi; Reigada, Ramon; Sagués, Francesc // Journal of Chemical Physics;6/22/2005, Vol. 122 Issue 24, p244722 

    In a photoresponsive Langmuir monolayer comprised of smectic-C-like domains of mesogenic trans-azobenzene derivative embedded within an isotropic matrix of its cis isomer counterpart, several structurally differing circular droplets were irradiated with linearly polarized light. This report...

  • Thermal characterization of anisotropic media in photothermal point, line, and grating configuration. Kalogiannakis, G.; Van Hemelrijck, D.; Longuemart, S.; Ravi, J.; Okasha, A.; Glorieux, C. // Journal of Applied Physics;9/15/2006, Vol. 100 Issue 6, p063521 

    This article is dedicated to the simulation of heat diffusion in layered anisotropic materials. The three-dimensional heat diffusion equation for layered, anisotropic materials is used to calculate a laser induced dynamic temperature distribution, the so-called thermal-wave field, in composites....

  • Fast and stable recording of birefringence and holographic gratings in an azo-polymethacrylate using a single nanosecond light pulse. Rodríguez, F. J.; Sánchez, C.; Villacampa, B.; Alcalá, R.; Cases, R.; Millaruelo, M.; Oriol, L. // Journal of Chemical Physics;11/22/2005, Vol. 123 Issue 20, p204706 

    Pulsed light-induced recording in azobenzene polymers has recently been studied due to its potential use in optical storage applications. In this paper we study the photoinduced birefringence (Δn) and holographic grating recording in an azobenzene side chain liquid-crystalline...

  • Charge injection through Langmuir–Blodgett films into organic polymers. Yuh, Huoy-Jen; Chen, Cindy C.; Chen, Inan // Applied Physics Letters;3/23/1987, Vol. 50 Issue 12, p730 

    The steady-state current-voltage characteristics resulting from charge injection from a metal into an organic charge transporting polymer are found to deviate significantly from the space-charge-limited values when a Langmuir–Blodgett film of cadmium stearate is interposed between the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics