Modulation of a surface plasmon-polariton resonance by subterahertz diffracted coherent phonons

Article

关键词: VIBRATIONAL-MODES;    ACTIVE PLASMONICS;    WAVE;    GENERATION;    NANOPARTICLES;    GRATINGS;    GARNET;    SILVER;    FILMS;    BULK;   

DOI  :  10.1103/PhysRevB.86.121401

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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