Nonlinear optical studies of photonic crystal waveguides

G. Vecchi, L. C. Andreani, G. Guizzetti, M. Patrini, A. M. Malvezzi, L. Businaro, E. Di Fabrizio, F. Romanato, A. Passaseo, M. De Vittorio

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper reports on nonlinear optical investigations of 2D photonic crystals etched into GaAs/AlGaAs waveguides by means of second-harmonic generation (SHG) from the surface of the samples. 130-fs laser pulses from a tunable Ti:sapphire source at 800 nm and from an optical parametric oscillator in the range 1.4 to 1.6 micron have been chosen to excite SH signals in reflection and diffraction directions. The measured angles of diffracted second-harmonic beams agree with those predicted from nonlinear diffraction conditions. The intensities of the reflected and diffracted SH signals are measured by varying the angle of incidence, input polarization and wavelength. Their observed behavior reflects the GaAs crystalline symmetry and the photonic crystal structure, respectively. Moreover, the measured high diffraction-to-reflection intensity ratio suggests the possibility of tailoring the nonlinear response using diffraction modes.

Original languageEnglish (US)
Title of host publication2003 IEEE/LEOS - Summer Topical Meeting
Subtitle of host publicationHoley Fibers and Photonic Crystals
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages39-40
Number of pages2
Volume2003-January
ISBN (Electronic)0780379829, 9780780379824
DOIs
StatePublished - 2003
Externally publishedYes
Event2003 IEEE/LEOS - Summer Topical Meeting - Vancouver, Canada
Duration: Jul 14 2003Jul 16 2003

Other

Other2003 IEEE/LEOS - Summer Topical Meeting
CountryCanada
CityVancouver
Period07/14/0307/16/03

Keywords

  • Etching
  • Gallium arsenide
  • Nonlinear optics
  • Optical diffraction
  • Optical harmonic generation
  • Optical pulse generation
  • Optical waveguides
  • Photonic crystals
  • Signal generators
  • Wavelength measurement

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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