All-Optical Switch With Cascaded Two-Stage Mach-Zehnder Interferometers Using Saturable Absorption Accompanied by Refractive-Index Change in Graphene

作者：Takahashi Misaki^*; Kishikawa Hiroki; Goto Nobuo; Yanagiya Shin ichiro

来源：Journal of Lightwave Technology, 2014, 32(21): 4226-4232.

DOI：10.1109/JLT.2014.2352624

• Graphene
• integrated optics
• optical switch
• saturable absorption

An all-optical switch using saturable absorption that accompanies refractive-index change such as in graphene films is proposed. The switching conditions are theoretically derived for arbitrary values of absorption and refractive-index change. It is found that switching can be performed by weaker control light when the refractive-index change is accompanied in saturable absorption. Switching conditions for various combinations of absorption and refractive-index change are confirmed by FD-BPM simulation. The saturable absorption and refractive-index change in multilayered graphene sheets are also discussed based on reported experimental results.

• 出版日期2014-11-1