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Temperature-tuned vector phase conjugation in azobenzene dye impregnated polymer films

Awangku Yusof, A.A.R., O'Leary, S.V. and Mitchell, G.R. (1999) Temperature-tuned vector phase conjugation in azobenzene dye impregnated polymer films. Optics Communications, 169 (1-6). pp. 333-340. ISSN 0030-4018

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To link to this item DOI: 10.1016/S0030-4018(99)00388-0


Near-perfect vector phase conjugation was achieved at 488 nm in a methyl red dye impregnated polymethylmethacrylate film by employing a temperature tuning technique. Using a degenerate four-wave mixing geometry with vertically polarized counterpropagating pump beams, intensity and polarization gratings were written in the dye/polymer system using a vertically or horizontally polarized weak probe beam. Over a limited temperature range, as the sample was heated, the probe reflectivity from the polarization grating dropped but the reflectivity from the intensity grating rose sharply. At a sample temperature of approximately 50°C, the reflectivities of the gratings were measured to be equal and we confirmed that, at this temperature, the measured vector phase conjugate fidelity was very close to unity. We discuss a possible explanation of this effect.

Item Type:Article
Divisions:Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Electron Microscopy Laboratory (CAF)
ID Code:26932

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