Optical Bistable Characteristics of Optical Quasi-waveguide Prepared with Host-Guest Thin Film

Kotani, Noriyuki; Furuhashi, Hideo; Uchida, Yoshiyuki; Ohashi, Asao; Kojima, K.; Ochiai, Shizuyasu; Mizutani, Teruyoshi

doi:10.1541/ieejeiss.124.2407

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Figure 4 shows incident-angle dependence versus TH intensity for the 3T/PMMA, and (t-Bu) 1:45 VOPc/PMMA composite films before being treated with organic gas and for the (t-Bu) 1:45 VOPc/PMMA composite film after being treated with organic gas for 25 h. The maximum TH intensity of the (t-Bu) 1:45 VOPc composite film exposed to organic gas is 20 times higher than that of the film before being treated with organic gas. 6,7) This indicates that the (t-Bu) 1:45 VOPc composite film is improved after being exposed to organic gas, showing with better grain size, molecular orientation, homogeneity, and surface smoothness than those before use to organic gas. 5,8) The third-order susceptibility ( ð3Þ ) of the (t-Bu) 1:45 VOPc composite film after being exposed to organic gas was 1:36 Â 10 À11 esu.…”

Section: Resultsmentioning

confidence: 96%

“…Therefore, it was reported that the refractive index change based on the thermal effect was related to the changing of the on-off position according to the input laser power intensity. 6) We aim to improve the on-off position shift depending on the laser power intensity. Therefore, a composite film with strong third-order nonlinearity was adopted in this study.…”

Section: Introductionmentioning

confidence: 99%

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

Ochiai

Isogai

Kojima

et al. 2008

jjap

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This paper presents an unsteady flow modeling of an electrorheological (ER) valve system and verifies its effectiveness through experimental investigation. After designing a cylindrical ER valve, a dynamic model for unsteady flow of ER fluid is derived by considering the fluid inertia. The field-dependent pressure drop of the unsteady flow is then calculated and validated with the experimental result. In order to clearly observe the difference between the unsteady flow model and the steady model, the flow rate of the ER valve is analyzed under low frequency and high frequency sinusoidal inputs. In addition, in order to demonstrate the effectiveness of the proposed unsteady flow model, a position control system activated by ER valves is constructed. The dynamic model of the control system is formulated on the basis of the unsteady flow analysis, and control responses such as flow rate, pressure drop and displacement are compared between the unsteady flow and the steady flow models.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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

Ochiai

Isogai

Kojima

et al. 2008

jjap

View full text Add to dashboard Cite

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Input Laser Power Dependence of the Optical Bistability of the Waveguide Constructed with a Triangular Prism and PMMA/Tertiary-butyl Vanadylphthalocyanine Composite Film

Kuwako¹,

Ochiai²,

Kojima³

et al. 2007

J. Vac. Soc. Jpn.

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After organic gas treatment for 25 hrs in 1,2 Dichloroethane vapor, the third order nonlinear susceptibility of PMMA/Tertiarybutyl Vanadylphthalocyanine [(t Bu) n VOPc] compositeˆlm was observed to increase markedly because the phase morphology of PMMA/(t Bu) n VOPc compositeˆlm changed from Phase I to II. A waveguide was prepared with a triangular prism and PMMA/ (t Bu) n VOPc compositeˆlm treated for 25 hrs in organic gas. When irradiating the waveguide with input laser power, the output power was recognized as having optical bistability. Moreover, the input laser power dependences of optical bistability were measured using the waveguide. Their optical bistability had a higher stability and sensitivity than that of the optical bistability reported previously and excellent reproducibility, which meant it was not necessary to write the error bars. However, in the input laser power dependences of optical bistability, the on-oŠ switching position shifts according to the input laser power intensity. This indicates that by changing the input laser power intensity, the thickness of the PMMA/(t Bu) n VOPc compositeˆlm increases due to the heat occurring when laser light is irradiated onto the compositeˆlm, leading to a marked enhancement in the third order nonlinear optical susceptibility (x (3) ), and a subsequent increase in the nonlinear optical refractive index of the PMMA/(t Bu) n VOPc compositeˆlm, linked to an enhanced x (3) value. Therefore, the increase in the x (3) value is closely related to the changing switch on-oŠ position, according to the input laser power intensity.

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考治¹,

鎮康²,

憲三³

et al. 2008

J. Vac. Soc. Jpn.

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Optical bistable devices have attracted much attention for application to optical-optical switch and so forth. We have prepared an optical bistable device of quasi-waveguide constituted comprise of a triangular prism and a poly (3 hexylthiophene)/poly (methyl methacrylate) composite thinˆlm. The thinˆlm was prepared by the spin coating method and drop casting method. With both the thin lms, optical bistability was clearly distinguished. The optical bistable characteristics of the quasi-waveguide prepared by the spin coating method can be observed with lower laser power intensity than that by the drop casting method.

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Optical Bistable Characteristics of Optical Quasi-waveguide Prepared with Host-Guest Thin Film

Cited by 3 publications

References 5 publications

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

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

Input Laser Power Dependence of the Optical Bistability of the Waveguide Constructed with a Triangular Prism and PMMA/Tertiary-butyl Vanadylphthalocyanine Composite Film

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