A Novel Graphene-Based Electro-Optical Modulator Using Modulation Instability

作者：Sharif Morteza A^*; Ghafary Bijan; Ara M H Majles

来源：IEEE Photonics Technology Letters, 2016, 28(24): 2897-2900.

DOI：10.1109/LPT.2016.2624562

• Electrooptical modulators
• chaotic communication
• nonlinear optical devices
• nonostructured materials

We propose for the first time a THz graphene-based electro-optical modulator. The novelty comes from working the device in modulation instability (MI) regime. Multiple embedded graphene layers inside an ionic gel enclosed by a Fabry-Perot resonator provide an enhanced nonlinearity required for starting MI process. Appeared as a pump wave, MI intensely amplifies the modulated wave. Consequently, the operational broad bandwidth and high modulation depth can be obtained. By using the double-gated electrodes' structure, the ultrafast generation rate of the charge carriers and lowly required driving voltage are attainable for a small footprint. The emerging high sensitivity of the device to the external electric field implies its applicability in non-intrusive electric field sensory tools. Finally, this graphene-based modulator introduces a feasible entity to control the chaotic wave propagation in THz optical communication.

• 出版日期2016-12-15