Design theory of double high-mesa wire waveguide for infrared optical absorption spectroscopy (レーザ・量子エレクトロニクス)

概要

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High mesa wire waveguide is attractive as it offers a capability of gas/liquid sensing due to its optical field, which profiles out of the waveguide. So far, we have proposed and demonstrated the sensing capability of it by using SOI-based Si/SiO_2 high-mesa wire waveguides. One critical issue for such kind of waveguide is the portion of the optical field profile out of the waveguide. To obtain higher portion, we have proposed double high-mesa structure already, however, its design rule has not been so clear up to now. In this report, we show the design theory of double high-mesa wire waveguide. Eigen-mode propagation can be realized although the structure is consisted of two symmetrical waveguides, and more than 80% portion can be realized in principle, in case of exploiting the design theory.
一般社団法人電子情報通信学会の論文
2009-10-15