铌酸锶钡光折变表面电磁波实验  

Experiment on PR SEW of SBN crystal

作　　者：张天浩[1] 路彦珍[1] 康慧珍[1] 杨大鹏[1] 郑建亚[1] 方哲宇[1] 楼慈波[1] 杨嘉[1] 杨会战[1] 尹美荣[1] 

机构地区：[1]南开大学物理科学学院光子学中心,弱光非线性光子学材料先进技术及设备教育部实验室,天津市信息光子材料与技术重点实验室,天津300071

出　　处：《物理学报》2005年第10期4688-4691,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60208002)资助的课题.~~

摘　　要：在实验中观察到扩散和漂移机理下在光折变晶体铌酸锶钡(SBN)与空气的界面形成的光折变表面电磁波.这种表面电磁波形成的条件是入射光束与界面成55°角入射,信号光与背景光比值越大越有利于形成表面电磁波,外加电场越大表面电磁波就越强.Photorefractive surface electromagnetic wave （PR SEW） at the interface between SBN crystal and air based on drift and diffusion mechanism was observed experimentally for the first time. PR SEW can be formed when laser beam was incident at an angle of 55° in proper ratio of signal beam to background beam, and the intensity of PR SEW increases along with the increasing of additional electric field.

关 键 词：表面电磁波 扩散和漂移机制 SBN 光折变晶体 铌酸锶钡 实验 入射光束 界面形成 外加电场 背景光 

分 类 号：O441.4[理学—电磁学]