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Construction of the refractive index profiles for few-mode planar optical waveguides |
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| Authors: | Haidong Zhu Zhuangqi Cao Qishun Shen |
| Affiliation: | aDepartment of Physics, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China bNational Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 390 Qing He Road, Box 800-211, Shanghai 201800, PR China |
| Abstract: | We present a nondestructive technique to predict the refractive index profiles of isotropic planar waveguides, on which a thin gold film is deposited to as the cladding. The negative dielectric constant of the metal results in significant differences of effective indices between TE and TM modes. The two polarized modes and a surface plasmon resonance (SPR) with abundant information of the surface index can be used to construct the refractive index profiles of single-mode and two-mode waveguides at a fixed wavelength. |
| Keywords: | Refractive index profile SPR method Few-mode isotropic waveguides TE and TM modes |
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