Holographic surface gratings in iron-doped lithium niobate

Sarkisov, SS Curley, MJ Kukhtarev, NV Fields, A Adamovsky, G Smith, CC Moore, LE

Ss. Sarkisov et al., Holographic surface gratings in iron-doped lithium niobate, APPL PHYS L, 79(7), 2001, pp. 901-903

20

INGLESE

Article

Apllied Physucs/Condensed Matter/Materiales Science

APPLIED PHYSICS LETTERS

0003-6951 → ACNP

79

7

2001

901 - 903

ISI

0003-6951(20010813)79:7<901:HSGIIL>2.0.ZU;2-8

Surface gratings associated with holographic volume gratings in photorefrac tive crystals of iron-doped lithium niobate have been studied using diffrac tion of a reflected probe beam and high-resolution phase-shifted interferom etric profilometry. Both techniques show that the surface gratings exist in the form of periodical corrugations of the same period as that of the volu me grating. The maximum amplitude of the periodical surface relief measured by both techniques is close to 6.5 nm. We also demonstrated that the perio dical electric forces on the surface were capable of assembling polystyrene microspheres along the fringes of the grating. Large amplitude of the peri odic electric field (1.6x10(4) V/cm) is associated with the photogalvanic e ffect. (C) 2001 American Institute of Physics.