Novel sol-gel material for fabrication of a long period waveguide grating filter as a precise thermometer

作者：Wang Xin; Li XiaoChan; Zhang Tao; Hu CanDong; Zhu QiuXiang; Chen SiHai; Li Yun; Xu Jia; He Miao^*; Niu QiaoLi; Zhao LingZhi; Li ShuTi; Zhang Yong

来源：Science China: Physics, Mechanics and Astronomy , 2011, 54(11): 1967-1971.

DOI：10.1007/s11433-011-4463-1

• LPWG filter
• soft-lithography
• sol-gel material
• temperature sensitivity

A new kind of organic-inorganic hybrid HfO(2)/SiO(2) sol-gel material with a large thermo-optic coefficient and a wide linear tunable temperature range has been developed for fabrication of a long period waveguide grating (LPWG) filter, whose parameters were optimized and designed by using finite difference time domain (FDTD) simulations. The LPWG filter, a periodic rectangle-corrugated grating structure, was easily fabricated with soft-lithography technique. At a temperature range from 19 degrees C to 70 degrees C, the fabricated LPWG filter element demonstrated a high temperature sensitivity of about 6.5 nm/degrees C and a wide linear tunable temperature range of 51 degrees C, so that it can be used as a precise thermometer. Our results are useful for the designs of LPWG filters for the implementation of a wide range of thermo-optic functions.

• 单位
  华南师范大学; 武汉大学