Continuously controllable, wide-angle liquid crystal beam deflector based on the transversal field effect in a three-electrode cell

Boris Apter, Eldad Bahat-Treidel, Uzi Efron

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A controllable, refractive, electro-optical liquid crystal (LC) beam deflector is studied both theoretically and experimentally. The principle of operation of this device is based on a beam deflection from a large gradient of refractive index, generated in an LC layer by a transversal electric field, formed between two lateral electrodes, in a simple three-electrode LC cell. A continuous, controllable deflection of a Gaussian laser beam, focused into the narrow region at the electrode gap is demonstrated. Maximum deflection angles of ∼18 to 25 deg, depending on the LC birefringence, as well as a high deflection efficiency of up to 98% are demonstrated experimentally, backed by a theoretical analysis.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalOptical Engineering
Volume44
Issue number5
DOIs
StatePublished - 1 May 2005

Keywords

  • Beam deflection
  • Fringing field
  • Liquid crystal
  • Refractive index gradient
  • Transversal field

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