Ultrafast Coherent Absorption in Diamond Metamaterials

Advanced Materials
Artemios KarvounisN I Zheludev

Abstract

Diamond is introduced as a material platform for visible/near-infrared photonic metamaterials, with a nanostructured polycrystalline diamond metasurface only 170 nm thick providing an experimental demonstration of coherent light-by-light modulation at few-optical-cycle (6 fs) pulse durations. "Coherent control" of absorption in planar (subwavelength-thickness) materials has emerged recently as a mechanism for high-contrast all-optical gating, with a speed of response that is limited only by the spectral width of the absorption line. It is shown here that a free-standing diamond membrane structured by focused ion beam milling can provide strong, spectrally near-flat absorption over a visible to near-infrared wavelength range that is wide enough (wider than is characteristically achievable in plasmonic metal metasurfaces) to facilitate coherent modulation of ultrashort optical pulses comprising only a few oscillations of electromagnetic field.

References

Nov 21, 2012·Nano Letters·Michael J BurekMarko Lončar
May 21, 2015·Nature Communications·Thomas RogerDaniele Faccio
Oct 19, 2017·Optics Express·Venkatram NallaNikolay I Zheludev

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Citations

Nov 7, 2018·Advanced Materials·Artemios KarvounisNikolay I Zheludev

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