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Realization of a Liquid Crystal Electrically Controlled Optical Waveguide on Micromachined Silicon (Articolo in rivista)

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Realization of a Liquid Crystal Electrically Controlled Optical Waveguide on Micromachined Silicon (Articolo in rivista) (literal)

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R. Asquini 1, D. Donisi 1, M. Trotta1, A. d'Alessandro 1, B. Bellini 2, G. Gilardi 2, and R. Beccherelli 2 (2009)
Realization of a Liquid Crystal Electrically Controlled Optical Waveguide on Micromachined Silicon
in Molecular crystals and liquid crystals (Phila. Pa. : 2003)
(literal)

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R. Asquini 1, D. Donisi 1, M. Trotta1, A. d'Alessandro 1, B. Bellini 2, G. Gilardi 2, and R. Beccherelli 2 (literal)

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1. Università Roma La Sapienza, Dipartimento di Ingegneria Elettronica, Roma, Italia 2. Consiglio Nazionale delle ricerche - Istituto per la Microelettronica e Microsistemi, Roma, Italia (literal)

Titolo

Realization of a Liquid Crystal Electrically Controlled Optical Waveguide on Micromachined Silicon (literal)

Abstract

In this paper we report the major fabrication steps and preliminary electro-optical characterization of a novel integrated liquid crystal optical waveguide on silicon substrate. The optical waveguide is made of a SiO2=Si V-groove with a triangular cross-section filled with nematic liquid crystal E7. The optical propagation in the channel waveguide is controlled by an external voltage which induces a refractive index variation by means of molecular director reorientation. For TM polarized light at a wavelength of 1.55lm, a threshold voltage of only about 2V and an extinction ratio higher than 35 dB were measured with 6.5 V applied. (literal)
In this paper we report the major fabrication steps and preliminary electro-optical characterization of a novel integrated liquid crystal optical waveguide on silicon substrate. The optical waveguide is made of a SiO2/Si V-groove with a triangular cross-section filled with nematic liquid crystal E7. The optical propagation in the channel waveguide is controlled by an external voltage which induces a refractive index variation by means of molecular director reorientation. For TM polarized light at a wavelength of 1.55 mu m, a threshold voltage of only about 2V and an extinction ratio higher than 35dB were measured with 6.5V applied. (literal)

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