Dynamic beam steering with all-dielectric electro-optic III–V multiple-quantum-well metasurfaces

Pin Chieh Wu, Ragip A. Pala, Ghazaleh Kafaie Shirmanesh, Wen Hui Cheng, Ruzan Sokhoyan, Meir Grajower, Muhammad Z. Alam, Duhyun Lee, Harry A. Atwater

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


Tunable metasurfaces enable dynamical control of the key constitutive properties of light at a subwavelength scale. To date, electrically tunable metasurfaces at near-infrared wavelengths have been realized using free carrier modulation, and switching of thermo-optical, liquid crystal and phase change media. However, the highest performance and lowest loss discrete optoelectronic modulators exploit the electro-optic effect in multiple-quantum-well heterostructures. Here, we report an all-dielectric active metasurface based on electro-optically tunable III–V multiple-quantum-wells patterned into subwavelength elements that each supports a hybrid Mie-guided mode resonance. The quantum-confined Stark effect actively modulates this volumetric hybrid resonance, and we observe a relative reflectance modulation of 270% and a phase shift from 0° to ~70°. Additionally, we demonstrate beam steering by applying an electrical bias to each element to actively change the metasurface period, an approach that can also realize tunable metalenses, active polarizers, and flat spatial light modulators.

Original languageEnglish
Article number3654
JournalNature communications
Issue number1
Publication statusPublished - 2019 Dec 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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