TITLE

Effects of substrate micropatterning on nonlinear optical properties of polar self-assembling films

AUTHOR(S)
Li, Leiming; Stupp, Samuel I.
PUB. DATE
June 2001
SOURCE
Applied Physics Letters;6/25/2001, Vol. 78 Issue 26, p4127
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Self-assembling triblock molecules were previously shown to form thin films with polar order. These films are also known to contain polar supramolecular aggregates that are layered in head-to-tail fashion. In this work, glass substrates were prepared using a focused-ion-beam system to generate 1 mmx1 mm areas containing periodic arrays of squares with lateral dimensions of 7 and 17 μm. The squares were defined by 3 μm wide and 10 nm deep troughs created by Ga ion beams. Using second-harmonic-generation measurements, the average molecular tilt angle was found to be smaller in patterned films, suggesting that micropatterning enhances overall polarization in these films. © 2001 American Institute of Physics.
ACCESSION #
4711077

 

Related Articles

  • Fast ion beams reveal structures of molecular ions. G.B.L. // Physics Today;May79, Vol. 32 Issue 5, p17 

    Focuses on a study which examined the structure of fast molecular-ion beams and their interactions with matter. Methodology; Information on the polarization wake induced by a fast charged particle; Measurement of the structure of the molecular-ion beams.

  • Polarization Optimization Studies in the RHIC Optically-Pumped Polarized H-Ion Source. Zelenski, A.; Alessi, J.; Briscoe, B.; Kponou, A.; Kokhanovski, S.; Klenov, V.; LoDestro, V.; Raparia, D.; Ritter, J.; Zubets, V. // AIP Conference Proceedings;2003, Vol. 675 Issue 1, p881 

    The performance of the RHIC Optically-Pumped Polarized H- Ion Source (OPPIS) in 2000–2002 runs in AGS and RHIC is reviewed. The OPPIS met the RHIC requirements for beam intensity with the reliable delivery of about 500 μA polarized H- ion current in 400 μs pulse duration (current...

  • Simple and efficient method of spin-polarizing a metastable helium beam by diode laser optical... Granitza, B.; Salvietti, M.; Torello, E.; Mattera, L.; Sasso, A. // Review of Scientific Instruments;Aug1995, Vol. 66 Issue 8, p4170 

    Describes the optical pumping process of the helium beam and its realization as well as the measurement of the degree of atomic polarization and the stabilization of laser frequency. Performance of the efficient pumping of the beam by means of a Bragg reflector diode laser; Circular...

  • Origin of anomalous polarization offsets in compositionally graded Pb(Zr, Ti)O[sub 3] thin films. Brazier, Mark; McElfresh, M. // Applied Physics Letters;1/11/1999, Vol. 74 Issue 2, p299 

    Studies the origin of anomalous polarization offsets in compositionally graded Pb(Zr,Ti)O[sub 3] thin films. Attribution of the offset observed in the graded films to development of a dc voltage across the ac-voltage driven film.

  • Improved tribological properties of sputtered MoSx films by ion beam mixing. Kobs, K.; Dimigen, H.; Hübsch, H.; Tolle, H. J.; Leutenecker, R.; Ryssel, H. // Applied Physics Letters;9/1/1986, Vol. 49 Issue 9, p496 

    Ion beam mixing yielded a distinct enhancement in the sliding life of sputtered MoSx films without any deterioration of the excellent lubrication properties. This effect occurs only at higher ion energies indicating an improved film-substrate adherence caused by a mixing of the interface, which...

  • Chemical Purity of Diamond-Like Films Produced by Ion-Beam Deposition. Pshenichnyuk, S. A.; Yumaguzin, Yu. M. // Technical Physics;Oct2001, Vol. 46 Issue 10, p1303 

    Secondary-ion mass spectrometry is applied to determine the elemental composition of thin diamond-like films produced on silicon substrates by high-vacuum deposition from ion beams. Qualitative analysis and comparison of the results with the data gained for graphite and pyrocarbon standard...

  • Preparation of BaTiO3 thin films by backside pulsed ion-beam evaporation. Sonegawa, T.; Grigoriu, C.; Masugata, K.; Yatsui, K.; Shimotori, Y.; Furuuchi, S.; Yamamoto, H. // Applied Physics Letters;10/7/1996, Vol. 69 Issue 15, p2193 

    Barium titanate (BaTiO3) thin films were successfully prepared in situ on Al/SiO2/Si(100) substrates by backside deposition from intense, pulsed, ion-beam evaporation using a 1.3 MeV, 50 ns, 25 J/cm2 ion beam. Good morphology of the films prepared was observed, where no droplets appear compared...

  • End point detection in ion beam milling of YBa[sub 2]Cu[sub 3]O[sub 7] thin films. Humphreys, R.G.; Chew, N.G. // Applied Physics Letters;7/13/1992, Vol. 61 Issue 2, p228 

    Presents an end point detection in ion beam milling of YBa[sub 2]Cu[sub 3]O[sub 7] thin films. Value of the depth resolution obtained during multilayer routine patterning; Demonstration of an accurate termination of milling at an insulator/superconductor interface; Effect of the presence of...

  • Theory of thin-film orientation by ion bombardment during deposition. Bradley, R. Mark; Harper, James M. E.; Smith, David A. // Journal of Applied Physics;12/15/1986, Vol. 60 Issue 12, p4160 

    Presents a study which examined the development of oriental order in thin films grown with off-normal incidence ion bombardment during deposition. Formulation of the theory; Predictions of the theory; Discussion; Conclusion.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics