Programmable Wavefront Control in the Visible Spectrum Using Low‐Loss Chalcogenide Phase‐Change Metasurfaces

Programmable Wavefront Control in the Visible Spectrum Using Low‐Loss Chalcogenide Phase‐Change Metasurfaces

Advanced Materials

10.1002/adma.202205367

http://dx.doi.org/10.1002/adma.202205367

Parikshit Moitra, Yunzheng Wang, Xinan Liang, Li Lu, Alyssa Poh, Tobias W.W. Mass, Robert E. Simpson, Arseniy I. Kuznetsov, Ramón Paniagua‐Domínguez

Phase-change materials, tunable metasurfaces, all-dielectric metasurfaces, Huygens’ metasurfaces, tunable beam bending, laser switching

07 November 2022

Moitra, P., Wang, Y., Liang, X., Lu, L., Poh, A., Mass, T. W. W., Simpson, R. E., Kuznetsov, A. I., & Paniagua‐Dominguez, R. (2022). Programmable Wavefront Control in the Visible Spectrum Using Low‐Loss Chalcogenide Phase‐Change Metasurfaces. Advanced Materials, 35(34). Portico. https://doi.org/10.1002/adma.202205367

AbstractAll‐dielectric metasurfaces provide unique solutions for advanced wavefront manipulation of light with complete control of amplitude and phase at sub‐wavelength scales. One limitation, however, for most of these devices is the lack of any post‐fabrication tunability of their response. To break this limit, a promising approach is employing phase‐change materials (PCMs), which provide fast, low energy, and non‐volatile means to endow metasurfaces with a switching mechanism. In this regard, great advancements have been done in the mid‐infrared and near‐infrared spectrum using different chalcogenides. In the visible spectral range, however, very few devices have demonstrated full phase manipulation, high efficiencies, and reversible optical modulation. In this work, a programmable all‐dielectric Huygens’ metasurface made of antimony sulfide (Sb2S3) PCM is experimentally demonstrated, a low loss and high‐index material in the visible spectral range with a large contrast (≈0.5) between its amorphous and crystalline states. ≈2π phase modulation is shown with high associated transmittance and it is used to create programmable beam‐steering devices. These novel chalcogenide PCM metasurfaces have the potential to emerge as a platform for next‐generation spatial light modulators and to impact application areas such as programmable and adaptive flat optics, light detection and ranging (LiDAR), and many more.

Publisher Copyright

This research / project is supported by the A*STAR - RIE2020 AME Programmatic Funding
Grant Reference no. : A18A7b0058

This research / project is supported by the National Research Foundation - Investigatorship Award
Grant Reference no. : NRF-NRFI2017-01

IET A F Harvey Engineering Research Prize 2016

This is the peer reviewed version of the following article: Moitra, P., Wang, Y., Liang, X., Lu, L., Poh, A., Mass, T. W. W., Simpson, R. E., Kuznetsov, A. I., & Paniagua‐Dominguez, R. (2022). Programmable Wavefront Control in the Visible Spectrum Using Low‐Loss Chalcogenide Phase‐Change Metasurfaces. Advanced Materials, 35(34). Portico. https://doi.org/10.1002/adma.202205367, which has been published in final form at doi.org/10.1002/adma.202205367. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

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