Ultrafast all-optical tuning of direct-gap semiconductor metasurfaces

Shcherbakov MR, Liu S, Zubyuk VV, Vaskin A, Vabishchevich PP, Keeler G, Pertsch T, Dolgova TV, Staude I, Brener I, Fedyanin AA (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Nature Communications Nature Publishing Group: Nature Communications

Book Volume: 8

Article Number: 17

Journal Issue: 1

DOI: 10.1038/s41467-017-00019-3

Abstract

Optical metasurfaces are regular quasi-planar nanopatterns that can apply diverse spatial and spectral transformations to light waves. However, metasurfaces are no longer adjustable after fabrication, and a critical challenge is to realise a technique of tuning their optical properties that is both fast and efficient. We experimentally realise an ultrafast tunable metasurface consisting of subwavelength gallium arsenide nanoparticles supporting Mie-type resonances in the near infrared. Using transient reflectance spectroscopy, we demonstrate a picosecond-scale absolute reflectance modulation of up to 0.35 at the magnetic dipole resonance of the metasurfaces and a spectral shift of the resonance by 30 nm, both achieved at unprecedentedly low pump fluences of less than 400 μJ cm^-2. Our findings thereby enable a versatile tool for ultrafast and efficient control of light using light.

Involved external institutions

Lomonosov Moscow State University / Московский государственный университет имени М.В.Ломоносова

Russian Federation (RU) Sandia National Laboratories

United States (USA) (US) Friedrich-Schiller-Universität Jena

Germany (DE)

How to cite

APA:

Shcherbakov, M.R., Liu, S., Zubyuk, V.V., Vaskin, A., Vabishchevich, P.P., Keeler, G.,... Fedyanin, A.A. (2017). Ultrafast all-optical tuning of direct-gap semiconductor metasurfaces. Nature Communications, 8(1). https://doi.org/10.1038/s41467-017-00019-3

MLA:

Shcherbakov, Maxim R., et al. "Ultrafast all-optical tuning of direct-gap semiconductor metasurfaces." Nature Communications 8.1 (2017).

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