Optical Bistability of Terthiophene/Poly(methyl methacrylate) Composite Film Prepared Using Spin-Coating

Ochiai, Shizuyasu; Isogai, Koji; Kojima, K.; Ohashi, Asao; Mizutani, Teruyoshi

doi:10.1143/jjap.47.446

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…Our aim to obtain optical bistability with less on-oŠ position shift and stable bistable characteristics. Already we have systematically investigated and reported the optical bistability of Terthiophene/Polymethylmethacrylate and P3HT/PMMA composite waveguides [7][8][9] . In the present paper, the optical bistability of P3OT/PMMA composite thinˆlm for diŠerent input power intensities and the eŠect of organic gas treatment for 25 hrs on the optical bistability of composite waveguide have been reported.…”

Section: Introductionmentioning

confidence: 99%

Optical Bistability of Poly(3-octylthiophene)/Polymethylmethacrylate Composite Waveguides Prepared by Spin Coating

et al. 2010

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Poly(3-octylthiophene)/Polymethylmethacrylate (P3OT/PMMA) composite waveguides were prepared by spin coating method as composing a prism-coupling waveguide. The UV-vis spectrum of P3OT/PMMA thinˆlm was recorded in the range 300-900 nm using spectrophotometer to determine the optical absorption property of the composite thinˆlm. The prepared P3OT/PMMA waveguide was treated with organic gas for 25 hrs to smoothing the surface of the thinˆlm. An Nd: YAG laser with a wavelength of 1064 nm, a pulse width of 5 ns and a repetition frequency of 10 Hz was used for optical bistability measurement. The optical bistable characteristics of prism coupling waveguide comprising with P3OT/PMMA composite thinˆlm was measured for diŠerent laser power intensities using optical bistable measuring equipment. The measured optical bistability displaced good stability and hysteresis characteristics. The input power dependence of optical bistability was observed and the switching on-oŠ position shifted with the increase of input power intensity. In addition, the eŠects of organic gas treatment on the optical bistability of P3OT/PMMA composite waveguides were analyzed.

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Section: Introductionmentioning

confidence: 99%

Optical Bistability of Poly(3-octylthiophene)/Polymethylmethacrylate Composite Waveguides Prepared by Spin Coating

et al. 2010

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“…The optical bistabilities of the optical devices (quasi-waveguide) composed of a prism and a dye/PMMA composite thin film were investigated. The optical bistable behavior in a quasi-waveguide interferometer with third-order optical nonlinearity in the guiding film composed of soluble poly(diacetylene) (poly-4BCMU) was demonstrated 19,20) . This device shows input-output behavior analogous to that of a nonlinear Fabry-Perot resonator.…”

Section: Introductionmentioning

confidence: 99%

Optical bistability of polythiophene derivative/polymethylmethacrylate composite thin films

et al. 2009

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Polymer composite materials have considerable attention in the modern technology and are an object of numerous fundamental and scientific investigations. Polymer composite materials have advances in physical and optical properties over single materials. It is well known that the refractive index of the optical materials play an major role for all optical functional properties. The change of refractive index due to optical intensity is important for making photo-devices such as optical switching, optical memory, and logic circuits. In the present work, we have investigated the polythiophene family derivatives i.e. poly(3-octylthiophene) (P3OT) and polymethylmethacrylate (PMMA) composites materials. The poly(3-octylthiophene)/polymethylmethacrylate (P3OT/PMMA) composite thin films were prepared by spin coating as composing a prism-coupling waveguide. The UV-visible absorption spectrum of the composite film was recorded in the range 300-900 nm using UV-visible spectrophotometer. The thickness of the composite films was measured as 3 μm using a surface profile measuring system. The optical bistability of P3OT/PMMA waveguide was measured using an Nd:YAG laser with a wavelength of 1064 nm, pulse width of 5 ns and a repetition frequency of 10 Hz. The optical bistable characteristics of P3OT/PMMA composite films were measured with different input laser power intensities (0.16, 0.20, 0.24 and 0.26 GW/m 2 ) and the measured optical bistability shows good stability and hysteresis characteristics.However, in terms of the input laser power dependence of optical bistability, the switching on-off position shifts with the increase in the input laser power intensity was observed. In the input laser power dependence of optical bistability, the switching on-off position shifted with the increase of input laser power intensity. The optical bistable behaviors are very stable for P3OT/PMMA composite thin film after exposed to organic gas. It suggests that the composite film exposed to organic gas has larger grain size, better molecular orientation, homogeneous bulk and smooth surface than before organic gas treatment. The effect of organic gas treatment and PMMA molecular weight on the optical bistable behavior of P3OT/PMMA composite waveguide was investigated. The shift of on-off position of the optical bistability is decreased with the composite films treated with organic gas due to the smooth surface, better molecular orientation than before organic gas treatment.

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“…However, in the input laser power dependence of optical bistability, the switching on-off position shifted according to input laser power intensity. This indicates that by changing the input laser power intensity, the composite thin film can be heated, leading to the phase transition of the composite film causing the optical refractive index of the composite film is subsequently increases 12) . In the present paper, the optical bistability of P3HT/PMMA composite thin film for different input laser power intensity and the effect of organic gas treatment for 25 hrs on the optical bistability of composite thin film have been reported.…”

Section: Introductionmentioning

confidence: 99%

Optical bistability of waveguide consisting of poly(3-hexylthiophene)/polymethylmethacrylate composite film

Ochiai

Mototani

Ramajothi

et al. 2008

Linear and Nonlinear Optics of Organic Materials VIII

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In the optical materials, the remarkable change of refractive index due to optical intensity is important for making photo-devices such as optical switching, memory and logic circuits. The optical waveguide consisted of poly (3-hexylthiophene)/polymethylmethacrylate (P3HT/PMMA) composite film and a prism was fabricated to find out its optical bistable characteristics. The refractive index of P3HT/PMMA composite film measured by ellipsometry was 1.48.Moreover, the refractive indexes of the atmosphere and the prism were 1.00 and 1.52 respectively. Therefore, the fabricated waveguide satisfied the condition of the quasi-waveguide. For improving the nonlinear optical characteristic of the composite film, P3HT/PMMA composite film was exposed to organic gas for 25 hrs. As the laser light source, Nd:YAG laser (wavelength: 1064 nm, pulse width: 5 ns, repetition frequency: 10 Hz) was adopted for optical bistability and third-harmonic intensity measurement. The input light intensity dependences of the optical bistable characteristics of the quasi-waveguide consisting of the P3HT/PMMA composite thin film, which was exposed to organic gas for 25 hrs were investigated. The measured optical bistability displaced excellent stability and hysteresis characteristics. It suggests that the composite film exposed to organic gas has larger grain size, better molecular orientation, homogeneous bulk and smooth surface than that of before organic gas treatment.

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Optical Bistability of Terthiophene/Poly(methyl methacrylate) Composite Film Prepared Using Spin-Coating

Cited by 6 publications

References 23 publications

Optical Bistability of Poly(3-octylthiophene)/Polymethylmethacrylate Composite Waveguides Prepared by Spin Coating

Optical Bistability of Poly(3-octylthiophene)/Polymethylmethacrylate Composite Waveguides Prepared by Spin Coating

Optical bistability of polythiophene derivative/polymethylmethacrylate composite thin films

Optical bistability of waveguide consisting of poly(3-hexylthiophene)/polymethylmethacrylate composite film

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