Opt Lett. 2014 Jan 15;39(2):271-4. doi: 10.1364/OL.39.000271.
We propose and numerically analyze a plasmonic Bragg reflector formed in a graphene waveguide. The results show that the graphene plasmonic Bragg reflector can produce a broadband stopband that can be tuned over a wide wavelength range by a small change in the Fermi energy level of graphene. By introducing a defect into the Bragg reflector, we can achieve a Fabry-Perot-like microcavity with a quality factor of 50 for the defect resonance mode formed in the stopband. The proposed Bragg reflector could be used as a broadband ultrafast tunable integrated filter and a broadband modulator. In addition, the defect microcavity may find applications in graphene-based resonators.
我们提出并数值分析了一种在石墨烯波导中形成的等离子体布拉格反射器。结果表明，石墨烯等离子体布拉格反射器可以产生一个宽带阻带，通过小的改变石墨烯的费米能级，可以在很宽的波长范围内进行调谐。通过在布拉格反射器中引入一个缺陷，我们可以在阻带中形成一个具有 50 的品质因数的 Fabry-Perot 型微腔的缺陷共振模式。所提出的布拉格反射器可以用作宽带超快可调谐集成滤波器和宽带调制器。此外，缺陷微腔可能在基于石墨烯的谐振器中得到应用。
