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In-plane light propagation in Ta2O5/SiO2 autocloned photonic crystals

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5 Author(s)
Sato, Takashi ; New Ind. Creation Hatchery Center, Tohoku Univ., Sendai, Japan ; Ohtera, Y. ; Ishino, N. ; Miura, Kenta
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We investigate the characteristics of in-plane light propagation in 2-D photonic crystals fabricated by the autocloning method, by which multiple layers are stacked while preserving periodic surface corrugation. A numerical analysis shows that Ta2O5/SiO2 autocloned photonic crystals are applicable to waveguides and lenses since a sufficient amount of change of the effective refractive index is obtained by adjusting the aspect ratio of the unit structure. It is also shown that the crystals have a wide bandgap applicable to Bragg reflectors and resonators. Experimental results reveal that in-plane propagation losses for the two directions are less than 1.4 dB/mm at λ=1.55 μm, showing the crystals are useful for low loss in-plane devices

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Quantum Electronics, IEEE Journal of  (Volume:38 ,  Issue: 7 )