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Ultrathin tunable terahertz absorber based on MEMS-driven metamaterial.

Publication ,  Journal Article
Liu, M; Susli, M; Silva, D; Putrino, G; Kala, H; Fan, S; Cole, M; Faraone, L; Wallace, VP; Padilla, WJ; Powell, DA; Shadrivov, IV; Martyniuk, M
Published in: Microsystems & nanoengineering
January 2017

The realization of high-performance tunable absorbers for terahertz frequencies is crucial for advancing applications such as single-pixel imaging and spectroscopy. Based on the strong position sensitivity of metamaterials' electromagnetic response, we combine meta-atoms that support strongly localized modes with suspended flat membranes that can be driven electrostatically. This design maximizes the tunability range for small mechanical displacements of the membranes. We employ a micro-electro-mechanical system technology and successfully fabricate the devices. Our prototype devices are among the best-performing tunable THz absorbers demonstrated to date, with an ultrathin device thickness (~1/50 of the working wavelength), absorption varying between 60% and 80% in the initial state when the membranes remain suspended, and fast switching speed (~27 μs). The absorption is tuned by an applied voltage, with the most marked results achieved when the structure reaches the snap-down state. In this case, the resonance shifts by >200% of the linewidth (14% of the initial resonance frequency), and the absolute absorption modulation measured at the initial resonance can reach 65%. The demonstrated approach can be further optimized and extended to benefit numerous applications in THz technology.

Duke Scholars

Published In

Microsystems & nanoengineering

DOI

EISSN

2055-7434

ISSN

2096-1030

Publication Date

January 2017

Volume

3

Start / End Page

17033

Related Subject Headings

  • 4018 Nanotechnology
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Liu, M., Susli, M., Silva, D., Putrino, G., Kala, H., Fan, S., … Martyniuk, M. (2017). Ultrathin tunable terahertz absorber based on MEMS-driven metamaterial. Microsystems & Nanoengineering, 3, 17033. https://doi.org/10.1038/micronano.2017.33
Liu, Mingkai, Mohamad Susli, Dilusha Silva, Gino Putrino, Hemendra Kala, Shuting Fan, Michael Cole, et al. “Ultrathin tunable terahertz absorber based on MEMS-driven metamaterial.Microsystems & Nanoengineering 3 (January 2017): 17033. https://doi.org/10.1038/micronano.2017.33.
Liu M, Susli M, Silva D, Putrino G, Kala H, Fan S, et al. Ultrathin tunable terahertz absorber based on MEMS-driven metamaterial. Microsystems & nanoengineering. 2017 Jan;3:17033.
Liu, Mingkai, et al. “Ultrathin tunable terahertz absorber based on MEMS-driven metamaterial.Microsystems & Nanoengineering, vol. 3, Jan. 2017, p. 17033. Epmc, doi:10.1038/micronano.2017.33.
Liu M, Susli M, Silva D, Putrino G, Kala H, Fan S, Cole M, Faraone L, Wallace VP, Padilla WJ, Powell DA, Shadrivov IV, Martyniuk M. Ultrathin tunable terahertz absorber based on MEMS-driven metamaterial. Microsystems & nanoengineering. 2017 Jan;3:17033.

Published In

Microsystems & nanoengineering

DOI

EISSN

2055-7434

ISSN

2096-1030

Publication Date

January 2017

Volume

3

Start / End Page

17033

Related Subject Headings

  • 4018 Nanotechnology