Active Tuning of Spontaneous Emission by Mie-Resonant Dielectric Metasurfaces

Bohn J, Bucher T, Chong KE, Komar A, Choi DY, Neshev DN, Kivshar YS, Pertsch T, Staude I (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Nano Letters American Chemical Society

Book Volume: 18

Pages Range: 3461-3465

Journal Issue: 6

DOI: 10.1021/acs.nanolett.8b00475

Abstract

Mie-resonant dielectric metasurfaces offer comprehensive opportunities for the manipulation of light fields with high efficiency. Additionally, various strategies for the dynamic tuning of the optical response of such metasurfaces were demonstrated, making them important candidates for reconfigurable optical devices. However, dynamic control of the light-emission properties of active Mie-resonant dielectric metasurfaces by an external control parameter has not been demonstrated so far. Here, we experimentally demonstrate the dynamic tuning of spontaneous emission from a Mie-resonant dielectric metasurface that is situated on a fluorescent substrate and embedded into a liquid crystal cell. By switching the liquid crystal from the nematic state to the isotropic state via control of the cell temperature, we induce a shift of the spectral position of the metasurface resonances. This results in a change of the local photonic density of states, which, in turn, governs the enhancement of spontaneous emission from the substrate. Specifically, we observe spectral tuning of both the electric and magnetic dipole resonances, resulting in a 2-fold increase of the emission intensity at λ ≈ 900 nm. Our results demonstrate a viable strategy to realize flat tunable light sources based on dielectric metasurfaces.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Australian National University (ANU) AU Australia (AU)

How to cite

APA:

Bohn, J., Bucher, T., Chong, K.E., Komar, A., Choi, D.-Y., Neshev, D.N.,... Staude, I. (2018). Active Tuning of Spontaneous Emission by Mie-Resonant Dielectric Metasurfaces. Nano Letters, 18(6), 3461-3465. https://doi.org/10.1021/acs.nanolett.8b00475

MLA:

Bohn, Justus, et al. "Active Tuning of Spontaneous Emission by Mie-Resonant Dielectric Metasurfaces." Nano Letters 18.6 (2018): 3461-3465.

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