Title: Formation of reconfigurable optical channel waveguides and beam splitters on top of proton-implanted lithium niobate crystals using spatial dark soliton-like structures
Authors: Tan, Yang
Chen, Feng
Wang, Xue Lin
Wang, Lei
Shandarov, V. M.
Kip, Detlef  
Language: en
Subject (DDC): DDC::500 Naturwissenschaften und Mathematik
Issue Date: May-2008
Publisher: IOP Publ.
Document Type: Article
Journal / Series / Working Paper (HSU): Journal of physics. D, Applied physics 
Volume: 41
Issue: 10
Publisher Place: Bristol
Abstract: 
We report on the formation of reconfigurable optical channel waveguides (including straight stripes and Y-branches) on top of iron-doped lithium niobate crystals. The sample surface is first implanted by 500 keV protons to form a planar waveguide showing a propagation loss of ∼1.6 dB cm-1 after modest post-implantation annealing. Afterwards, the sample surface is illuminated with well-defined stripe patterns (straight channels, beam splitters) of green light using lithographic masks. Due to the photovoltaic effect in lithium niobate resulting in negative index changes in illuminated regions, waveguide layers are formed in the non-illuminated regions perpendicular to the planar waveguide in the same way as it occurs in the dark spatial soliton regime. In this way two-dimensional waveguides are formed in the overlap region on top of the crystal that may be used for reconfigurable optical interconnections and splitters. © 2008 IOP Publishing Ltd.
Organization Units (connected with the publication): Technische Universität Clausthal
URL: https://api.elsevier.com/content/abstract/scopus_id/43049100403
ISSN: 00223727
DOI: 10.1088/0022-3727/41/10/102001
Appears in Collections:Publications of the HSU Researchers (before HSU)

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