Modulation of a surface plasmon-polariton resonance by sub-terahertz   diffracted coherent phonons
  Coherent sub-THz phonons incident on a gold grating that is deposited on a dielectric substrate undergo diffraction and thereby induce an alteration of the surface plasmon-polariton resonance. This results in efficient high-frequency modulation (up to 110 GHz) of the structure's reflectivity for visible light in the vicinity of the plasmon-polariton resonance. High modulation efficiency is achieved by designing a periodic nanostructure which provides both plasmon-polariton and phonon resonances. Our theoretical analysis shows that the dynamical alteration of the plasmon-polariton resonance is governed by modulation of the slit widths within the grating at the frequencies of higher-order phonon resonances. 
Christian Br\"uggemann, Andrey V. Akimov, Boris A. Glavin, Vladimir I.   Belotelov, Ilya A. Akimov, Jasmin J\"ager, Sachin K...
cond-mat.mtrl-sci cond-mat.mes-hall