The optical properties of planar waveguides in LiB₃O₅ crystals formed by Cu⁺ implantation

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• 作者：Yi Jiang ; Chuan-Lei Jia ; Lei Wang ; Xue-Lin Wang ; Feng Chen ; Ke-Ming Wang ; Qing-Ming Lu ; Hong-Ji Ma ; Ding-Yu Shen
• 关键词：Ion-implantation ; Optical waveguide ; LiB₃O₅ crystal
• 刊名：Applied Surface Science
• 出版年：2006
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：30 December 2006
• 卷：253
• 期：5
• 页码：2674-2677
• 文件大小：168 K

摘要

A planar optical waveguide has been formed in a LiB₃O₅ crystal using 6.0 MeV Cu⁺-ions with a dose of 1 × 10¹⁵ ions/cm² at room temperature. Possible propagating modes were measured at a wavelength of 633 nm using the prism-coupling method. The refractive index profiles of the waveguide were reconstructed by an effective refractive index method and the beam propagation method was used to investigate the properties of the propagation modes in the formed waveguide. The results suggest that the fundamental TE₀ and TM₀ modes may be well-confined and propagate a longer distance inside the waveguide. The implantation process was also simulated using the transport of ions in matter code (TRIM), which indicates that the nuclear energy deposition may be the main factor for the refractive index change.