Low-voltage driving in nematic liquid crystal overlayered waveguide

Okamura, Yasuyuki; Kitatani, Kazuhiro; Yamamoto, S.

doi:10.1109/jlt.1986.1074723

Cited by 16 publications

(2 citation statements)

References 9 publications

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“…Their use as electrodes in waveguide modulators has been described. High quality films have been 21 prepared by several methods including vacuum evaporation, rf sputtering, dc sputtering, 22,23 24 25 and chemical vapour deposition (CVD). The 26 optical and electronic properties of films vary widely depending on deposition method, substrate temperature, whether the deposition is reactive (i.e., carried out under a partial pressure of reactive gas) and on the post-treatment of the films e.g., annealing.…”

Section: B Ito Filmsmentioning

confidence: 99%

Indium tin oxide overlayered waveguides for sensor applications

Luff¹,

Wilkinson²,

Perrone³

1997

Appl. Opt.

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The use of indium tin oxide (ITO) thin films as electrodes for integrated optical electrochemical sensor devices is discussed. The effect of various thicknesses of ITO overlayers exhibiting low resistivity and high transparency on potassium ion-exchanged waveguides fabricated in glass substrates is investigated over the wavelength range 500-900 nm. ITO overlayers are formed by reactive thermal evaporation in oxygen, followed by annealing in air to a maximum temperature of 320 C. With air as superstrate, losses in the waveguides were found to o increase dramatically above 30nm ITO thickness for TE polarization, and above 50nm thickness for TM. Losses were increased over the whole wavelength range for a superstrate index close to that of water. A one-dimensional multilayer waveguide model is used in the interpretation of the experimental results.

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Section: B Ito Filmsmentioning

confidence: 99%

Indium tin oxide overlayered waveguides for sensor applications

Luff¹,

Wilkinson²,

Perrone³

1997

Appl. Opt.

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“…Combining the criteria for the bar and crossover states, a minimum device length relating to the change of coupling coefficient can be derived as Ld =r/2(K'-K) (3) From the relationship, it is obvious that maximizing the change of the coupling coefficient in a structure can achieve the minimum device length, and this must depends on the large refractive index change of LC.…”

Section: Discussionmentioning

confidence: 99%

<title>Investigation of liquid crystal switch on integrated optics with rib waveguides</title>

Chang

Chuang

Liang

1996

Fiber Optic Components and Optical Communication

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In consideration of better confinement of optical field and integration with practical communication network of optical fiber, we propose a novel vertical L ic directional coupler switch with inverted rib waveguides made of nematic liquid crystals(NLC5). Becaused of the large birefringence of LC's, a very short switching length, about 60 ji in, is obtained; furthermore, the high extinction ratio, 25.73 dB, can be achieved in the three-dimensional switch.

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