title: Non-invasive characterization of the domain boundary and structure properties of periodically poled ferroelectrics.
abstract: Shaping the ferroelectric domains as waveguide, grating, lens, and prism are key to the successful penetration of periodically-poled ferroelectrics on various wavelength conversion applications. The complicated structures are, however, difficult to be fully characterized, especially the unexpected index contrast at the anti-parallel domain boundaries are typical in the order of 10(-4) or less. An ultrahigh resolution optical coherence tomography was employed to fully characterize the domain boundary and structure properties of a periodically-poled lithium niobate (PPLN) waveguide with an axial resolution of 0.68 μm, an transversal resolution of 3.2 μm, and an index contrast sensitivity of 4x10(-7). The anti-parallel domain uniformity can clearly be seen non-invasively. Dispersion of the ferroelectric material was also obtained from 500 to 750 nm.
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Shan-Chuang
authors.initials: SC
authors.lastname: Pei
authors.forename: Tuan-Shu
authors.initials: TS
authors.lastname: Ho
authors.forename: Chien-Chung
authors.initials: CC
authors.lastname: Tsai
authors.forename: Ting-Hao
authors.initials: TH
authors.lastname: Chen
authors.forename: Yi
authors.initials: Y
authors.lastname: Ho
authors.forename: Pi-Ling
authors.initials: PL
authors.lastname: Huang
authors.forename: A H
authors.initials: AH
authors.lastname: Kung
authors.forename: Sheng-Lung
authors.initials: SL
authors.lastname: Huang