中国物理B ›› 2019, Vol. 28 ›› Issue (10): 104209-104209.doi: 10.1088/1674-1056/ab427c

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Low insertion loss silicon-based spatial light modulator with high reflective materials outside Fabry-Perot cavity

Li-Fei Tian(田立飞), Ying-Xin Kuang(匡迎新), Zhong-Chao Fan(樊中朝), Zhi-Yong Li(李智勇)   

  1. 1 State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2019-06-19 修回日期:2019-07-10 出版日期:2019-10-05 发布日期:2019-10-05
  • 通讯作者: Zhong-Chao Fan, Zhi-Yong Li E-mail:zcfan@semi.ac.cn;lizhy@semi.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61575076 and 61804148) and the National Key Research and Development Plan of China (Grant No. 2016YFB0402502).

Low insertion loss silicon-based spatial light modulator with high reflective materials outside Fabry-Perot cavity

Li-Fei Tian(田立飞)1,2, Ying-Xin Kuang(匡迎新)1,2, Zhong-Chao Fan(樊中朝)2, Zhi-Yong Li(李智勇)1   

  1. 1 State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • Received:2019-06-19 Revised:2019-07-10 Online:2019-10-05 Published:2019-10-05
  • Contact: Zhong-Chao Fan, Zhi-Yong Li E-mail:zcfan@semi.ac.cn;lizhy@semi.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61575076 and 61804148) and the National Key Research and Development Plan of China (Grant No. 2016YFB0402502).

摘要:

The extinction ratio and insertion loss of spatial light modulator are subject to the material problem, thus limiting its applications. One reflection-type silicon-based spatial light modulator with high reflective materials outside the Fabry-Perot cavity is demonstrated in this paper. The reflectivity values of the outside-cavity materials with different film layer numbers are simulated. The reflectivity values of 6-pair Ta2O5/SiO2 films at 1550 nm are experimentally verified to be as high as 99.9%. The surfaces of 6-pair Ta2O5/SiO2 films are smooth:their root-mean-square roughness values are as small as 0.53 nm. The insertion loss of the device at 1550 nm is only 1.2 dB. The high extinction ratio of the device at 1550 nm and 11 V is achieved to be 29.7 dB. The spatial light modulator has a high extinction ratio and low insertion loss for applications.

关键词: spatial light modulator, high reflective materials, silicon-based, Fabry-Perot cavity

Abstract:

The extinction ratio and insertion loss of spatial light modulator are subject to the material problem, thus limiting its applications. One reflection-type silicon-based spatial light modulator with high reflective materials outside the Fabry-Perot cavity is demonstrated in this paper. The reflectivity values of the outside-cavity materials with different film layer numbers are simulated. The reflectivity values of 6-pair Ta2O5/SiO2 films at 1550 nm are experimentally verified to be as high as 99.9%. The surfaces of 6-pair Ta2O5/SiO2 films are smooth:their root-mean-square roughness values are as small as 0.53 nm. The insertion loss of the device at 1550 nm is only 1.2 dB. The high extinction ratio of the device at 1550 nm and 11 V is achieved to be 29.7 dB. The spatial light modulator has a high extinction ratio and low insertion loss for applications.

Key words: spatial light modulator, high reflective materials, silicon-based, Fabry-Perot cavity

中图分类号:  (Optical processors, correlators, and modulators)

  • 42.79.Hp
42.79.Fm (Reflectors, beam splitters, and deflectors) 95.85.Jq (Near infrared (0.75-3 μm)) 71.20.Mq (Elemental semiconductors)