Organic crystal isopropyl-4-acetylphenylurea and waveguide second-harmonic generation

H. Yamamoto, S. Funato, T. Sugiyama, J. Jung, T. Kinoshita, K. Sasaki

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    A new organic crystal isopropyl-4-acetylphenylurea (IAPU) was identified as a promising candidate for blue second-harmonic generation (SHG). The nonlinear optical d coefficient obtained is d22 = 30.5 pm/V at the fundamental wavelength 1064 nm, and the crystal's transmitting range is 380-1400 nm. Thin, single crystalline films fabricated on the glass substrate are useful for waveguide-device applications. For the improvement of SHG efficiency and the relaxation of phase-matching conditions, the concept of thickness-noncritical phase matching (TNCPM) in a four-layer waveguide is proposed. Modal dispersion calculations for the various four-layer structures suggested the possibility of TNCPM from the TE0ω mode to TE1 mode and from the TE0ω mode to the TE2 mode by adjustment of the refractive indices of the two guiding layers.

    Original languageEnglish
    Pages (from-to)1099-1108
    Number of pages10
    JournalJournal of the Optical Society of America B: Optical Physics
    Volume14
    Issue number5
    DOIs
    Publication statusPublished - 1997 May

    ASJC Scopus subject areas

    • Statistical and Nonlinear Physics
    • Atomic and Molecular Physics, and Optics

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