Publications by Year: 2001

2001
E DelRe, A Ciattoni, and AJ Agranat. 2001. “Anisotropic charge displacement supporting isolated photorefractive optical needles.” Optics Letters 26 (12), Pp. 908 - 910. Publisher's Version Abstract

Strong asymmetry in the charge distribution supporting a single noninteracting spatial needle soliton in a paraelectric photorefractive is directly observed by means of electroholographic readout. Whereas in trapping conditions a quasi-circular wave is supported, the underlying double-dipolar structure can be made to support two distinct propagation modes. (C) 2001 Optical Society of America

Aharon J Agranat, Lavi Secundo, Noam Golshani, and Meir Razvag. 2001. “Wavelength-selective photonic switching in paraelectric potassium lithium tantalate niobate.” Optical Materials, 18, 1, Pp. 195 - 197. Publisher's Version Abstract
A generic wavelength-selective switching method is presented. The method is based on the voltage-controlled photorefractive effect in paraelectric crystals. The switch consists of a crystal at the paraelectric phase in which a space charge grating was stored by a photorefractive process. Diffraction occurs by the application of a uniform electric field that causes the space charge grating to induce an index grating. Results of the diffraction efficiency as a function of the applied field and the time dependence of the diffracted beam are presented. The performance envelop of a switch based on this effect is briefly discussed.
Accession Number: S0925346701001665; Author: Agranat, Aharon J. (a, ∗); Author: Secundo, Lavi (a); Author: Golshani, Noam (a); Author: Razvag, Meir (b); Affiliation: Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel; Affiliation: Trellis Photonics Ltd., Jerusalem Technology Park, Jerusalem 96951, Israel; Number of Pages: 3; Language: English;