Near-field observations of light confinement in a two dimensional lithium niobate photonic crystal cavity | Zendy

Jean Dahdah | Zendy; Maria Pilar-Bernal | Zendy; Nadège Courjal | Zendy; Gwenn Ulliac | Zendy; Fadi Baida | Zendy

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Near-field observations of light confinement in a two dimensional lithium niobate photonic crystal cavity

Author(s) -

Jean Dahdah,

Maria Pilar-Bernal,

Nadège Courjal,

Gwenn Ulliac,

Fadi Baida

Publication year - 2011

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3647770

Subject(s) - lithium niobate , near field scanning optical microscope , materials science , photonic crystal , optics , waveguide , optical microscope , photonics , optoelectronics , microscopy , focused ion beam , scanning electron microscope , ion , chemistry , physics , organic chemistry

International audienceWe report the characterization of a lithium niobate photonic crystal cavity using near field scanning optical microscopy (NSOM) operating in collection scanning mode. The cavity is implemented on an annealed proton exchange waveguide by focused ion beam milling. We observe a confinement of the optical field at the center of the cavity by analyzing the collected light with a probe positioned above the photonic structure. The experimental NSOM results obtained are compared to numerical results obtained by finite difference time domain method. A good agreement is obtained between theoretical and experimental results where a cavity mode appears around λ = 1540 nm

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