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Title: Buried channel waveguides in KTiOPO 4 nonlinear crystal fabricated by focused He + beam writing
Authors: Dong, N.
Yao, Y.
Jia, Y.
Chen, F.
Vanga, S.K.
Bettiol, A.A. 
Lu, Q.
Keywords: Channel waveguides
He + beam writing
KTP crystals
Issue Date: Dec-2012
Citation: Dong, N., Yao, Y., Jia, Y., Chen, F., Vanga, S.K., Bettiol, A.A., Lu, Q. (2012-12). Buried channel waveguides in KTiOPO 4 nonlinear crystal fabricated by focused He + beam writing. Optical Materials 35 (2) : 184-186. ScholarBank@NUS Repository.
Abstract: We report on the fabrication of KTiOPO 4 channel waveguides by using a new technique, i.e., focused He ion beam writing. With direct inscription of 2 MeV He + beams of diameter of 0.5 μm, a local modified region with positive refractive index changes is created at the end of the He + trajectory, constructing buried channel waveguides supporting both TE and TM polarizations. The calculated modal profiles of the waveguides are in good agreement with the experimental near-field intensity distributions. The propagation loss has been determined to be as low as ∼0.7 dB/cm, exhibiting good guiding properties for diverse photonic applications. © 2012 Elsevier B.V. All rights reserved.
Source Title: Optical Materials
ISSN: 09253467
DOI: 10.1016/j.optmat.2012.07.007
Appears in Collections:Staff Publications

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