Four-layer optical waveguide device using isopropyl-4-acetylphenylurea (IAPU)

Hironobu Yamamoto, Satoru Funato, Tsunetoshi Sugiyama, Robert E. Johnson, Robert A. Norwood, Takeshi Kinoshita, Keisuke Sasaki

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


The new organic crystal isopropyl-4-acetylphenylurea (IAPU) was identified as a promising candidate for frequency doubling to the blue light region. The nonlinear optical d-coefficient, d22 = 35 pm/V was obtained at 1064 nm by the Maker-fringe technique. The crystal's transmitting range is 380-1400 nm. Thin film of IAPU crystallize appropriately for waveguide applications. Thickness-noncritical phase-matching (TNCPM) in a four-layer waveguide structure using an IAPU crystal as a top cladding layer is proposed. Modal dispersion calculations for four-layer waveguides demonstrate the possibility of TNCPM from TE0$+ω/ mode to TE1$+2ω/ mode by adjusting the refractive indices of the two guiding layers, where the modal dispersion curves are intentionally designed to be tangent over a limited waveguide thickness. The TNCPM condition in an organic-inorganic hybrid four-layer waveguide structure is discussed as are its relaxation of tolerance requirements on waveguide fabrication.

Original languageEnglish
Pages (from-to)263-272
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics
Issue number1-4
Publication statusPublished - 1995
Externally publishedYes
EventProceedings of the 1994 International Conference of Optically Nonlinear Organic Materials and Applications (4th IKETANI Conference) - Hawaii Island, HI, USA
Duration: 1994 May 171994 May 20

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Condensed Matter Physics


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