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Opt Express. 2009 Jan 5;17(1):228-34.

Low bending loss metal waveguide embedded in a free-standing multilayered polymer film.

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Electronics and Telecommunications Research Institute, Yusong-gu, Daejeon, Korea.


Very low vertical bending loss is demonstrated in a flexible metal waveguide. The waveguide consists of an 8 nm-thick and 68 mm-long Ag strip embedded in a free-standing multilayered low-loss polymer film. The polymer film is composed of a 10 microm-thick inner cladding with a refractive index of 1.524, and a pair of 20 microm-thick outer claddings which both have a refractive index of 1.514, resulting in a total thickness of 50 microm. The measured vertical bending loss is lower than 0.3 dB/180 masculine at a wavelength of 1310 nm for the bending radii down to 2 mm.

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