J4 ›› 2010, Vol. 27 ›› Issue (1): 100-104.

• Laser Applications • Previous Articles     Next Articles

Research of grating-assisted SW sensor

YU Feng, XU Xin-Sheng, KAN Qiang, WANG Chun-Xia, LIU Hong-Wei, CHEN Hong-Da   

  1. State Key Laboratory Integrated Optoelectronics, Institute of Semiconductor, Chinese Academy of Sciences, Beijing 100083, China
  • Published:2010-01-28 Online:2009-12-30

Abstract:

An ordinary prism coupling SW sensor and grating-assisted SW sensors are studied using rigorous-coupled-wave-analysis method. We design the material parameters and structural parameters of the one-dimensional photonic crystal and grating, which works under 1550nm. The depth of grating is 20nm, the pitch is 524.6nm, and the duty cycle is 0.5. Simulation shows that grating leads to the emergence of dual-resonance dip, and the surface mode is spitted. The use of double resonance dips characteristics, can improve sensitivity to the perspective of an ordinary prism structure SW sensor 3 times.

Key words: optoelectronics, surface waves, sensors, angular sensitivity, band gap