Proposal of a grating-based optical reflection switch using phase change materials

Xiaomin Wang*, Masashi Kuwahara, Koichi Awazu, Paul Fons, Junji Tominaga, Yoshimichi Ohki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We have proposed a novel grating-based optical reflection switch using a phase change material (PCM). The device switches on/off light or shifts the light propagation direction by switching the PCM grating between its amorphous and crystalline states. Thus, the switching status is non-volatile and the device is promising for realizing low power consumption. The device structure was designed and optimized by numerical simulations to obtain high switching efficiency. It is shown that there exists a parameter window where high efficiency is achievable. The static switching characteristics were confirmed by finite-difference time-domain (FDTD) simulations. The design scheme can also be applied to other planar dielectric gratings.

Original languageEnglish
Pages (from-to)16947-16956
Number of pages10
JournalOptics Express
Issue number19
Publication statusPublished - 2009 Sept 14

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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