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arXiv · 1206.2771

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

Christian Brüggemann·Andrey V. Akimov·Boris A. Glavin·Vladimir I. Belotelov·Ilya A. Akimov·Jasmin Jäger·Sachin Kasture·Achanta Venu Gopal·Arvind S. Vengurlekar·Dmitri R. Yakovlev·Anthony J. Kent·Manfred Bayer
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Abstract

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.

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Christian Brüggemann, Andrey V. Akimov, Boris A. Glavin, Vladimir I. Belotelov, Ilya A. Akimov, Jasmin Jäger, Sachin Kasture, Achanta Venu Gopal, Arvind S. Vengurlekar, Dmitri R. Yakovlev, Anthony J. Kent, Manfred Bayer. 2012-06-13. Modulation of a surface plasmon-polariton resonance by sub-terahertz diffracted coherent phonons. https://doi.org/10.1103/physrevb.86.121401

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