Two waveguide layers in lithium niobate crystal formed by swift heavy Kr ion irradiation

• 作 者: 刘涛 黄庆 赵金花 孔伟金 刘鹏 张连 周育范 于晓飞 王磊 王雪林
• 机 构: School of Physics, Qingdao University,Key Laboratory of Photonics Materials and Technology in Univer
• 出 处: Chinese Physics B
• 发表日期: 2015年05期
• 关键词: waveguide irradiation lithium confinement irradiated refractive trajectory depth

We report the formation of two waveguide layers in a lithium niobate crystal by irradiation with swift heavy Kr ions with high(Ge V) energies and ultralow fluences. The micro-Raman spectra are measured at different depths in the irradiated layer and show that the high electronic energy loss can cause lattice damage along the ion trajectory, while the nuclear energy loss causes damage at the end of the ion track. Two waveguide layers are formed by confinement with two barriers associated with decreases in the refractive index that are caused by electronic and nuclear energy losses, respectively.

We report the formation of two waveguide layers in a lithium niobate crystal by irradiation with swift heavy Kr ions with high (Ge V) energies and ultralow fluences. The micro-Raman spectra are measured at different depths in the irradiated layer and show that the high electronic energy loss can cause lattice damage along the ion trajectory, while the nuclear energy loss causes damage at the end of the ion track. Two waveguide layers are formed by confinement with two barriers associated with decreasing in the refractive index that are caused by electronic and nuclear energy losses, respectively.