We present a design for modulating light in an optical fiber, which achieves efficient modal field interaction between the fundamental mode of an air-silica microstructure optical fiber and tunable materials incorporated in the air-holes of the fiber.|We present a design for modulating light in an optical fiber, which achieves efficient modal field interaction between the fundamental mode of an air-silica microstructure optical fiber and tunable materials incorporated in the air-holes of the fiber.

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