Open AccessFabrication of spatial modulated second order nonlinear structures and quasi-phase matched second harmonic generation in a poled azo-copolymer planar waveguide
Author(s) -
Jian Hung Lin,
Ngoc Diep Lai,
Chau Han Chiu,
Chin-Hsiang Lin,
Georg W. Rieger,
Jeff F. Young,
Fan Ching Chien,
Chia Chen Hsu
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.007832
Subject(s) - materials science , optics , second harmonic generation , poling , planar , laser , fabrication , wavelength , waveguide , nonlinear optics , quasi phase matching , optical parametric oscillator , optoelectronics , polarization (electrochemistry) , second harmonic imaging microscopy , dielectric , physics , ferroelectricity , medicine , chemistry , computer graphics (images) , alternative medicine , pathology , computer science
This work demonstrates that arbitrary types of spatially modulated second-order susceptibility (chi((2)) structures such as 1D and 2D, periodic and quasi-periodic structures can be obtained by using the combination of corona poling and direct laser writing (DLW) techniques. The fabrication technique is based on the photodepoling of azo-dye molecules caused by one-photon or two-photon absorption during the DLW process. Polarization and second harmonic generation (SHG) images of the fabricated structures were measured by electrostatic force microscope and SHG mapping techniques, respectively. Furthermore, quasi-phase-matched (QPM) enhanced SHG from a 1D periodically poled azo-copolymer planar waveguide is demonstrated using an optical parametric oscillator laser by scanning wavelength from 1500 to 1600 nm. The resonant wavelength of the QPM enhanced SHG is peaked at 1537 nm with FWHM is congruent to 2.5 nm.