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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 22 — Oct. 26, 2009
  • pp: 20291–20300

Photonic crystal structures in ion-sliced lithium niobate thin films

Frederik Sulser, Gorazd Poberaj, Manuel Koechlin, and Peter Günter  »View Author Affiliations


Optics Express, Vol. 17, Issue 22, pp. 20291-20300 (2009)
http://dx.doi.org/10.1364/OE.17.020291


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Abstract

We report on the first realization of photonic crystal structures in 600-nm thick ion-sliced, single-crystalline lithium niobate thin films bonded on a lithium niobate substrate using adhesive polymer benzocyclobutene (BCB). Focused ion beam (FIB) milling is used for fast prototyping of photonic crystal structures with regular cylindrical holes. Unwanted redeposition effects leading to conically shaped holes in lithium niobate are minimized due to the soft BCB layer underneath. A high refractive index contrast of 0.65 between the lithium niobate thin film and the BCB underlayer enables strong light confinement in the vertical direction. For TE polarized light a triangular photonic crystal lattice of air holes with a diameter of 240 nm and a separation of 500 nm has a photonic bandgap in the wavelength range from 1390 to 1500 nm. Experimentally measured transmission spectra show a spectral power dip for the ΓK direction of the reciprocal lattice with an extinction ratio of up to 15 dB. This is in good agreement with numerical simulations based on the three-dimensional plane wave expansion (PWE) and the finite-difference time-domain (FDTD) method.

© 2009 Optical Society of America

OCIS Codes
(130.3730) Integrated optics : Lithium niobate
(250.5300) Optoelectronics : Photonic integrated circuits
(160.5298) Materials : Photonic crystals
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Photonic Crystals

History
Original Manuscript: September 8, 2009
Revised Manuscript: October 8, 2009
Manuscript Accepted: October 19, 2009
Published: October 22, 2009

Citation
Frederik Sulser, Gorazd Poberaj, Manuel Koechlin, and Peter Günter, "Photonic crystal structures in ion-sliced lithium niobate thin films," Opt. Express 17, 20291-20300 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-22-20291


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